Yamaha ox66 high pressure fuel pump I've said it many times I’ll show the high pressure fuel pump output from idle to 1300rpms. 2 - yamaha oem lower unit gaskets. 1 - yamaha oem vst fuel filter. That's with the key on, idle, and up to 3500 RPMs (that is as high as I was comfy running in a bucket) Outboard fired right up. You just need a small 10mm socket and 4 zip-ties for the fuel lines. 54 to ,57 ohms. it has left me on the water 2-3 times. 2001 OX66 150HP High Fuel Pressure reading. 2 - yamaha About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright I don’t have water in the fuel, changed with new fuel water separator, I put ring free and Yamaha fuel stabilizer in it religiously. EFI models 41-52 psi HPDI models 35. A clogged vent will cause fuel shortages to your carburetor at high speeds, as fuel is pulled from an unvented tank, a vacuum develops that your pump can't overcome. I've changed the low pressure fuel pumps and checked the screen on the high pressure one. the high pressure pump checks good pressure right on the money and doesn't drop it . Put power to pump sometimes still hard to start. Have a 1998 Yamaha 250 two stroke, generally runs well. 70 ohms. Jump to page: Uodate: replaced all 3 low pressure fuel pumps and my boat runs better than it ever has. Google OX66 fuel pump Lexington High Back Reclining Helm Seat Shop Helm Seats. traced it to high pressure pump. 2000 Yamaha OX66 250HP SX250TXRY 61AX103847T 1982 Grady Weekender/Offshore (removed stern drive & modded to be an OB) Comment. It measured 1. Service Manuals. D. Aug 6, 2011 #2 Re: yamaha ox66 stalling How about giving us the fuel pressures you read when doing the testing. i called yamaha service they told me at idle the motor runs on 4 cylinders, after 2000 she runs on 6. Yamaha OX66 flooding. 2000 250hp OX66 shuts down at high RPMs. VST tank is full, clean and refills. Cranks instantly all day and I can get up to 6k rpms again. Check it at the tire shrader valve you mentioned above. You can hear it if you listen to the vst and have someone turn on the key at the same time. I ran it off of a remote tank and same thing. The fuel pressure decreased down to around 30psi as I pulled about 30kPa (~8" Hg) of vacuum. Thanks Comment. CDF. All three fuel pumps and filters are new. According to the manual I've got, this is expected. Find many great new & used options and get the best deals for Yamaha Outboard 225hp OX66 High Pressure Fuel Pump And VST Part #66K-13907-00-00 at the best online prices at eBay! Free shipping for many products! Yamaha Outboard 225hp OX66 High Pressure Fuel Pump And VST Part #66K-13907-00-00. stator with the engine running and it will continue to run fine until the battery goes below 9 volts and can't run the high pressure fuel pump. Start date Aug 22, 2006; M. In a final act of desperation, I replaced the Lexington High Back Reclining Helm Seat Shop Helm Seats. Thread starter rogsnow; Start date Aug 18, 2011; R. I have a Yamaha Vmax 200 ox66 and I want to change the low pressure fuel pumps. I recently changed out all my fuel lines from tank to engine, replaced the fuel filter on the engine, primer bulb, and fuel/water separator. Skip to main content. Outdoorsman. the low pressure fuel pumps operate using a diaphragm. Checked all three low pressure pumps and Yamaha Motors; OX66 Turning off at high RPMS; Thread: OX66 Turning off at high RPMS. acted like it ran out of gas. 3) clean pressure regulator screen on VST. countless times. Reply. Has anyone had any experience with aftermarket pumps? OEM is just north of $500, aftermarket close to $70. 6) replace water pump 7) replace engine filter and water separator filter. Results 1 to 13 of 13 It's tied in to the high pressure fuel pump with a relay, so they only run for five seconds when the key is turned on if I am currently purchasing my 3rd set of low pressure fuel pumps for my ox66 in 2years. UPS Next Day and Re: Ox66 Yamaha NO voltage to fuel pump HI just wanted to tell you what I did today. chbaker3 Recruit. Fully HPDI High Pressure fuel pump failure? I have twin 200hp HPDI motors and the port motor will not rev beyond about 2400 rpm and is rough running. Thanks Tags: None. After a 10 mile run out into the LI Sound last week, when we got to our location, it would not idle. Thread starter Fishtail67; Start date Jan 22, 2015; F. 1 - yamaha oem vst gasket. Join 2000 Yamaha OX66 250HP SX250TXRY 61AX103847T 1982 Grady Weekender/Offshore You can check fuel pressure with a tire pressure round gauge, should have around 40 psi. What are the symptoms of low pressure fuel pumps failing or bad/clogged/dirty o2 sensor. Replaced all filters There is no resistance specification given for an OX66 high pressure fuel pump. Changed filters, ran a Back Pumps and Plumbing. Most that I have seen give problems they will just shut down, never to work again. Then it shuts off until the motor is running. So I thought the problem had to be the high pressure fuel pump. The float chambers and covers are the same. Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. 5 volts when throttle plate is completly closed) changes all fuel pumps (lift lumps and high pressure)and had Re: OX66 low pressure fuel pump diaphragms I just did this on my 200 HPDI. On a normal days fishing that breaks down to about $10-$15 difference in fuel. As far as prop and rpm's i have a yamaha Re: 2000 OX66 225hp surging & bogging above 3000RPM VST = Vapor Separating Tank - (or something like that). Still stalled. Hose's are fine but the fuel bulb really never gets hard. Posts; Latest Activity . I replaced the fuel bulb and fuel/water separator filter and it ran fine on a water hose. The fuel pressure is 35 psi and cylinders all Yamaha 115 4 stroke problems & solutions International oem low pressure fuel pump kit 1876108c92. he feels the pump is draging or starting to lock up and the hicups and rough ideling then stalling is because the fuel pump is not Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. Everything I listed below are maintenance things that need to be done typically every year if not more depending on use. 2000 ox66 LX150 TXRZ. Lyle Spellings. com FREE DELIVERY possible on eligible purchases FPF Fuel Pump for Yamaha 2003-2020 FJR1300 Replace OEM 5JW-13907-23-00, 5JW-13907-10-00, 5JW-13907-13-00. changed all filters new high pressure pump , new lift pumpoxs last year . 53 - 0. Shop by Engine. rodbolt Supreme Mariner. Symptoms of bad LP fuel Pumps in OX66 06-30-2017, 12:14 PM. have a 2000 250 hp ox 66. When I returned boat would not High-Pressure Fuel Pump Resistor: 0. JLM MARINE 2PCS 6E5-24410 Fuel Pump for Yamaha 2 Stroke 115 130 140 150 175 200 225 250 300 HP Outboard Models 6E5-24410-02 18-7349. Delivering to Nashville 37217 Update location -3 new LP fuel pumps-Most filters, VST, On-board fuel filter, Water separator on the boat, (not oil filter)-New lines from Water separator to engine-New primer bulb-New plugs, and Plug boots, (Tested resistance)-O2 sensor looked terrible so I cleaned it up-Cleaned out the High-pressure regulator screen 4. USD Re: 1998 Yamaha 225 OX66 SHUTS DOWN - Pressure & Amp readings Re: 1998 Yamaha 225 OX66 SHUTS DOWN - Pressure & Amp readings I finally picked up the fuel pressure tester. It is basically a float type fuel bowl that the high pressure pump pulls the fuel from. I'm thinking potentially bad kill switch or neutral switch, or bad ground, or bad connection somewhere, or taking up I have a 2002 ox66 2 stroke 250 hp. Filter. Turn the key on without starting the motor. 50-70 is normal. Joined Jun 29, 2020 If fuel pressure is down, change filters and consider strainer on VST This video shows how to test a 2 stroke Yamaha outboards low pressure fuel pump. I'm guessing then its a bad fuel pump or clog in the tank pickup screen? Frustrated. As the manifold pressure goes down the fuel pressure goes down. Page 1 of 2 1 2 Last. Previous Outdoor Network LLC Yamaha Parts. replace the low pressure fuel pumps. 225 ox66 starving for fuel 07-23-2011, 12:44 PM The high pressure fuel pump was replaced about 100-150 engine hours ago, and the low pressure pumps were replaced during the rebuild. Try FUEL INJECTION PUMP GENERATOR INTAKE LOWER CASING DRIVE 1 SX LOWER CASING DRIVE 2 SX MODELS IN THIS CATALOG OIL PUMP Fuel system: 0X66 Remote Control. I called a Yamaha master tech at a dealer in Houston today and he says he is pretty sure it is the fuel pressure regulator that is letting too much fuel go by and not creating the back pressure it needs. Buy NewYall High Pressure Fuel Pump for Kia Sportage Optima Sorento Hyundai Elantra Santa Fe Sport Sonata 2. How To Replace An Outboard Water Pump - YouTube Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. Aug 18, 2011 #1 i have a problem with my ox66 250 outboard (2006). I attached a pressure gauge and get no pressure from the port. How to rebuilt a fuel pump on a yamaha 250hp ox66 outboard and also how to change the spark plugs. Can anyone tell me if tapping into the blue wire is correct? When I turn the key on, I This fuel pump fits the Yamaha V6 250 OX 66 Saltwater Series II 2-Stroke outboards (Made between 1999 and 2002). It's alway good to spray t-9 corrosion protection on mar I recently purchased a low hour '00 Yamaha 200 OX66 that has a "stuck" high pressure fuel pump. Seems like a connection problem wi Delete Plates supplied by : Speed Doctor Racing Components. This page was generated at 1 minute ago. cobra9750 Cadet. All filters and fuel is good per routine maintenance. Will check both the bulb and the fuel pumps today. Junior Member Yamaha 6E5-24410-10-00 FUEL PUMP ASSEMBLY; 6E5244101000; New # 6E5-24410-03-00; Snowmobile Parts As the manifold pressure goes up the fuel pressure goes up. At Replaced blown lift pumps, HP fuel pump high pressure reduced after cleaning pressure regulator screen. S. did a full rebuild, deleted the oil injection system Buy QFS OEM Marine/Outboard Fuel Pump w/Strainer Replacement for Yamaha Outboard EFI 150-250 HP, 1997-2001, OEM 65L-13907-00-00, 66K-13907-00-00, 67H-13907-00-00: Electric Fuel Pumps - Amazon. But the engine fuel filter does not stay full, goes down to about 1/4 inch above the screen. It should have 12 volts to pressurize the fuel into the injectors. I'm having a fuel problem with my 2001 Yamaha OX66 250 hp. found a bad fuel pump due to fuel pressure slowly dropping at WOT and then later a bad fuel pressure regulator because the pressure would stay super high almost 100psi. Yamaha Ox66 fuel pumps tests 07-08-2020, 11:18 AM but pull back on the stick and it comes back . to/4aUrrUDFuel Line - https://amzn. Finally dove into the project and decided to record it. Not sure what caused the piston damage on my old motor. a 2000 250 ox66 that is fouling number 1 and 5 plugs every 4 to 5 hours of running time. Our flat rate shipping is USPS Priority which is 2-3 business days to most of the U. When I applied 25kpa as the book states, the fuel pressure dropped to 33 psi. ----- 1 - yamaha oem water pump rebuild kit. what is the proper way to test pumps? thanks in advance ! Tags: None. 719 hours. Try rapping it with a scewdriver handle a few times if still not starting. Yamaha Motors; OX66 fuel pump relay options; Thread: OX66 fuel pump relay options. The specification is for fuel pump output pressure. I am 99% sure this is due to fuel that wasn't treated and/or drained from the VST before the engine was put in to storage, so it went bad and locked the pump up. I have read where several Yamaha Owners have replaced their lift pumps-and primer bulb with an electric fuel pump. inside that VST is the electric pump that supplies the injectors. 1 - yamaha oem fuel filter. HaulinBass. 1L LP Fuel Pump question Mercury - 2. no water in fuel. These fuel pumps are in stock and ship out the same business day if ordered before 3PM Eastern - after 3PM they will ship out next business day. Could be the high pressure pump. My fuel pressure gets erratic out of no where when I'm at high rpm till it gets so low its shutsdown. 80/30 amp fuses are good. Thread starter chbaker3; Start date Feb 6, 2011; C. Joined Jul 14, 2010 Ok guys I need a little help. The engine actually runs on its own miniature built-in fuel tank - the "VST" holds about half a cup of gas. TPS checks out within specs. 5 psi invariant under all conditions, even during the loss of rpm event), Cleaned the O2 sensor, Checked link & synch, checked TPS. Try it and see. Thermostats swapped out every other year since I have owned it. The fuel must be at a precise pressure for the fuel injectors to perform As stated in a manual; Turn ignition key to ON/RUN and immediately check and correct fuel leakage. pump has 12V anytime the key is on, ECU completes the ground path to make it run, below 1200 and the path is through the resistor above 1200 The shop that did the install replaced all the low pressure fuel pumps. com. View All; Fresh Water Boat Systems had injectors cleaned and tested, Checked low pressure fuel, VST high pressure fuel (35. Re: OX66 stals at high RPM!!! and I am still telling you to fix your fuel system BEFORE it runs lean and smokes a piston. Install your pressure gauge. Can anyone tell me how to access the fuel pressure regulator filter screen? I looked at the diagram and it's kinda hard to tell if it's inside hi guys im new to the sight i need helpi have a 1999 225 yamaha ox66 vmax. That was an expensive mistake. DIY Larry Eby, 2004 ChampioN 188 Elite/2003 200 Hp Vmax OX66 "Romans 10:9" That makes me believe the problem is not filling the VST, i. I only run ethanol free and put a little ring free on every fill up (1oz\10gal) I just eat the darn things and I am sick of it. I've changed the spark plugs and checked for water in fuel, found none. Posts: 125. 45 (I have ordered a The only trick is that you need to loosen the high pressure fuel pump assembly to get to one of the bolts on the middle pump (there are three). It seems like I'm not getting power to the electric pump, but while following the aftermarket service book, it said to check the resistor for the fuel pump if problems are suspected. When was the last time the High Pressure Fuel pump (VST) was serviced as well as internal (inside the VST fuel pump body ) cleaned or replaced? Also, the same for the O2 sensor. 1-239-367-0202. Thought about changing the high pressure electric fuel pump but don't want to just throw money No vent problem. boats. since problem started i have replaced many parts to try and correct this problem and also several parts for general maintenance as the engine is around 1,000 hours. I also put a direct 5 gallon tank of fresh gas and still starts for 3 seconds and shuts off. It ended up Yamaha ox66 fuel pump question #7366931 04/03/12 12:47 AM: Joined: Nov 2010. 1 - remote oil tank filter. I traced the problem to the high pressure fuel pump that feeds the injector tree. A friend of mine had a similar problem with his 225 Optis and was able to determine that Merc gets their I'm trying to troubleshoot my 2000 ox66 250 fuel injection system. And I have also gotten fuel from a few different stations, tried different additives, and even ran 89 and 91 octane once each with no change. So guys any suggestions here would be a big help so I can start to narrow down the cause. For some reason the gas is not getting to the vst. If you have power/ground and no flow, then the pump is bad. SX250 OX66. With this kind of guarantee, you can rest assure you are taken care of if any issue occurs. 5 volts with the engine running then the Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. com FREE DELIVERY possible on eligible purchases pump delivers constant 30 psi pressure from electric pump to the high pressure pump and she runs again! HPDI motors hi this is my first post but i will say that i have done research and used the search fuction. and did you monitor them while the problem was occuring? B. 0 2. test the lift pumps. The book states it should be . UPS Next Day and I bought a fuel pressure tester. Yamaha has used these LP pumps for years. 200 OX66 Won't start (fuel related) edit: now wont start period. i have pulled and cleaned the vst tank and screen i have pulled and cleaned the 02 If the problem isn't in the fuel pump, that leaves the question unanswered, but one possible answer lies at the fuel tank; check the fuel tank vent first. I checked one on a neighbors boat If fuel pressure is good out of the low pressure pump but low on the high pressure pump, then either the high pressure pump is bad, or there is trash in the vapor tank that the high pressure I recently purchased a low hour '00 Yamaha 200 OX66 that has a "stuck" high pressure fuel pump. 1L OX66. net. 04-02-2017, 12:14 PM. Yamaha pumps. it doesn't happen right away maybe 10-15 min into bein on plane and over 3000 rpms. The "low speed" pump is a diaphragm operated pump using the same principals as a fuel pump on Johnsons and Evinrudes since the late 50's and early '60's. I wired the the relay into blue wire of my VST High pressure fuel pump as a few folks did on Youtube. Lexington High Back Reclining Helm Seat Shop Helm Seats. Thread starter Mark S. Both motors have low pressure fuel pumps, VST fuel pump with screen inside it, canister fuel filter (high pressure), some HPDI's have O2 sensors (2. I would replace the filters and high pressure pump screen first. Too much fuel for the Spark Plugs fuel filters 3 LP fuel pumps opened VST, replaced filter even though it was clean when i opened Menu. . Hey guys i have a 2000 yamaha 225 ox66 lx225txry. Less smoking at startup as well. All times are GMT-5. low pressure fuel system is not the troublemaker. Thus far, I have changed the O2 sensor (reads . swflfisherman (269) 98. Fuel pressure seemed to be right about 34 psi. Motor runs fine for a while (15-25mins) at all speeds and RPMs (wot @ 5500-5700), soon as it gets warmer and it hits 4000rpm or over, shuts down, like if I turn the key off!! Motor starts right away, when HPDI high pressure fuel filter 11-29-2014, 01:08 PM. The Boating Forum - OX66 Fuel Pressure reading high?? - Hello All - This all started since I am having surging problems at higher RPMs. The engine is turning over and has a spark on all 6 plugs, but the pump is not I replaced the high pressure fuel pump and can hear it fire up on the first click of the ignition for 3 seconds. Sometimes i spray a little 2+2 in intake and it restarts. 8v. If your batteries aren't getting low and you get 13. M. TPS voltage can be monitored,O2 sensor voltage can be monitored,rail pressure can be monitored,lift pump intake vacum can be moitored,can be done with the yamaha flow testing tool or on the lake with a vacum gauge. It was around $170 for the solenoid, fuel line connectors, hardware, aluminum stock to fashion over the low pressure vacuum holes, fuel pump, and tread plate that I mounted the pump on. 99yam40. The key turns on the high pressure pump for 3 seconds when the key is first turned on. View All; Barbeque Grills Yamaha 200HP OX66 Fuel Pressure Drop If This Does Not Solve It Move To Low Pressur Fuel Pumps, Should Be Ghanged Every 3 Years $ 100 For The 3 YOU HAVE TO REMOVE MABEY 8 OR 9 SCREWS TO DROP THE BOTTOM OFF THE VST Re: yamaha 225 OX66 dies at high speed thanks. High pressure fuel pump: Also known as the VST pump, it pressurizes the fuel before sending it to the fuel rail. Heads up guys, I'm pulling off my 2000 Yamaha OX66 225hp 25" shaft outboard. Ive replaced the fuel priner ,lo pressure pumps, filters ,plugs,bypassed the fuel tank ,cleaned the Customer: 2001 Yamaha f225 ox66. Replaced high pressure low pressure pumps, vst needle valve and spark plugs. now fow the VST. This seems a little lower than I remember and maybe felt like it was idling a little rougher than pre 2000-year 225 Yamaha EFI OX66 Replace 3-lift pumps with electric pump. The engine turns over reel fast but won't crank. Recently have replaced the lift pumps and high pressure fuel pump, injectors have been rebuilt. com FREE DELIVERY possible on eligible purchases. That engine also has a fuel pump that runs at 2 different speeds by controlling the should a 200HP ox66 saltwater series 2, have a fuel pressure of 35. These fuel pumps are in stock and ship out the same business day if on that OX66, the ign system is old school alternator driven CDI. Ran it but same as before. View Profile View Forum Posts Private Message Either way the electric FP is the way to eliminate the stumbling experienced with the vacuum assist LP fuel pumps. Document Viewer. DIY Larry Eby, 2004 ChampioN 188 Elite/2003 200 Hp Vmax OX66 "Romans 10:9" I'm servicing the filter inside the Vapor Separator on my 2002 Yamaha OX66 150hp engine. If not check the fuel pump relay. filter. arlington . Senior Member. Replaced blown lift pumps, HP fuel pump high pressure reduced after cleaning pressure regulator screen. Fuel Pump Link - https://amzn. OT- Attention Yamaha OX66 owners. Maybe my high pressure fuel pump is faulty. I figure I do have a problem with either: - the high pressure fuel pump, or - the pressure regulator valve on top of the VST, or - the high pressure fuel pump filter (which I cleaned about 4 -5 hours ago and still find it clean). Gas and tank are brand new, all filters are new, and new yamaha primer bulb as well. First, check the fuel lines and connections to ensure they are properly connected and not kinked or damaged. TOP SELLING ITEMS FOR YOUR 2000 Outboard 225hp [ SX225TXRY ] Yamaha Motors. 1999 Yamaha ox66 225 - Fuel injectors? Thread starter JahDW; Start date Sep 10, 2021; JahDW Member. Yamaha Motors; OX66 low pressure fuel pump delete mod; Thread: OX66 low pressure fuel pump delete mod. Looking for others who experienced problems with 2000 Yamaha 225 HP OX 66 whose fuel pump needed replacement after storage. 6 - ngk br8hs-10 spark plugs. has a new tp sensor installed. 6? or is the clymer guide correct for the EFI model? i am thinking bad or weak pump or fuel pressure Start throttling up while watching the fuel pressure gauge, if the fuel pressure falls to nothing then you have a bad pump or not enough fuel making it into the VST tank for the Fuel bulb squeezed and sucked in? That says everyting You have a blockage in the fuel line before your fuel squeeze ball that is creating a vacume. Thread starter abrngolf; Start date Feb 7, 2023; A. Thanks and best of luck! :nanner: -Chris If anyone is looking for detailed VIDEO instructions on deleting your lift I have a problem with low fuel pressure and losing 600rpm on the top end of 1998 250 ox66 I have changed low pressure pumps, VST filter, water separator, plugs, fuel lines. At fast idle and through the mid-range, the engine performs fine. I have a 2004 yamaha 150 OX 66 (SX150TXRC) that is starving for fuel above 4000 - 4500 RPM's. When I went to restart this past weekend with new tank, no pressure from HP pump. I suspect fuel pressure will be 40 psi plus. CDF OP. Aug 22, 2006 #1 There is spark. Sputtering yamaha outboard fixed. I’ll give you the details and then I’m all ears. When attached to the valve its a steady 35. 2003 225 OX66. 4/ 2. run it after the job to check for leaks. 8 volts), reset the TPS (. Ive eliminated clogged filters as the HP pump strainer is clean, the fuel regulator basket strainer Yamaha Motors; 250HP OX66 High Fuel Burn and Sluggish; Thread: 250HP OX66 High Fuel Burn and Sluggish. If it were me I would go ahead and replace all three if you find one leaking. Fuel looks as if it only trickles in. Two bolts each. will generate spark as long as the flywheel is turning. 4. Kevin | 2000 Champion 19 1 | 2000 Yamaha OX66 200hp. <br /><br />I followed all Yamaha's directions in the operator and service manuals for long term storage, i. e. Hey guys I have a 1999 225 OX66 that I am working on. Remove the output hose from the pump, and see if the pump runs. Run the engine on a different fuel supply to verify where the problem is. while running engine dies. Comment. How to test a low pressure fuel pumpYamaha 4 stroke testing high pressure injector pump, low fuel Low Pressure Fuel Pump 03-12-2013, 10:52 AM. Leaving all the fuel lines connected, Loosen the two 10mm bolts, wiggle the pump to loosen it from the block and squeeze the fuel ball My high pressure fuel pump on my 2003 Yamaha 200 OX-66 bit the dust. With the key on, lanyard in place voltage reading at fuel pump fuse is . Hi, I have 2002 yamaha 250 ox66, i am having exactly the same problem, no more than 4000 rpms. Find many great new & used options and get the best deals for OEM Yamaha Outboard 250hp OX66 Fuel Pump And VST at the best online prices at eBay! Free shipping for many products! It was around $170 for the solenoid, fuel line connectors, hardware, aluminum stock to fashion over the low pressure vacuum holes, fuel pump, and tread plate that I mounted the pump on. If there is a problem with the relay, you will have no fuel pressure at all at the Schrader valve. Service Manual LIT-18616-02-02. idled between 500 and 600 RPMs. 3 LP fuel pumps with gaskets on each motor. It should read in the neighborhood of . Mark S. When you remove vst for Yes, the OX66 motors have the same fuel filters as the HPDI's. Responces are spec. Thread . Coming in today it shut down and wouldn't restart. If you have a 1999 OX66 in a 225 or 250 (and perhaps others) specifically an S250TXRX - BE CAREFUL about which VST filter and gasket you purchase. Replaced fuel check valve past engine filter and cleaned out the check valve on the tank and replaced fuel primer bulb. to/47BeSdVRelay - https://amzn. 1999 Grady Sailfish SX225 OX66 1998 Grady Tigercat S200 lightening strike But I JUST replaced them all only about 20 to 40 hours ago. when this diaphragm g Re: Yamaha 200 EFI OX66 VMAX Help please the electronics are solid on that engine,failure is rare. com FREE DELIVERY Hey guys i have a 2000 yamaha 225 ox66 lx225txry. the high pressure pump did seize up but i was able to free it up soaking it in fuel injector cleaner. Contact Us. High pressure fuel rail: Takes the pressurized fuel and delivers it to the fuel injectors. Feb 7, 2023 #1 Looking for opinions and options for replacement high pressure pump for my 2003 ox 66 sx200txrb. Fishtail67 One of the mechanical fuel pumps is leaking fuel into the pulse port. 6L). ox66 aftermarket high pressure fuel pumps. new pt Pump ox66. Pump failures are not too uncommon. I have not ohm checked the wires, but what are the chances all six went bad at once? I will check. I actually had a spare (actually 2 spares). from the low pressure pump-motor paper filter-primer bulb-flow meter-water This will allow excess fuel to be pumped directly into the cylinders and foul spark plugs and your O2 sensor. It still had the same problem. 57v and it measured at something like 0. Skip to content. VST tank is full, clean and refills High Pressure fuel pump will not always turn on, and I have issues with intermitting cutouts while operating in the water. When this happens it may start back in a minute or two and sometimes it my have to set for a day or two before it will fire. us. <br /> you dont have - see if you have power to the high pressure fuel pump. We've stocked a huge selection of replacement high-pressure fuel pumps for your Yamaha outboard engine. Fuel pressure at idle is 38 psi. 2000 Yamaha ox66 surging at high speeds and fuel blowing out exhaust. 8% positive; Seller's Yamaha Outboard Forum . What else is there to look at. Turn ignition key OFF for 30 sec. OP. Loss of Power to HP fuel pump OX66 08-05-2013, 05:37 PM. Back Cabin and Galley. and with the engine off it hold pressure and Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. low pressure fuel pump replace 5. its simply running out of fuel, when it does the shutdown can be quite violent, almost like the key was i have tested fuel pressure. Once I start giving it throttle, it shuts off and won't start back for several hours. Just replaced all fuel pumps. 1 - yamaha oem fuel/water separator. 4: Electric Fuel Pumps - Amazon. Sync the throttle plates, couldn't set idle speed because I Still had a Stall. There is a fuel pressure regulator in the VST. Loosen the two bolts and squeeze the primer bulb. Sputtering yamaha outboard fixed Signs of a bad outboard fuel pump & how to troubleshoot Yamaha outboard low pressure vst fuel pump 4-8psi 200 225 250hp 69j. the system is designed to operate the high pressure pump for about I've got a 1999 Yamaha 150 ox66 fuel injection and having trouble running it past idle speed. Show Printable Version; Can you rebuild high pressure fuel pump (03 OX66)? By djd in forum Yamaha Motors Replies: 3 Last Post: 06-28-2008, 09:13 AM. Post Cancel nope the high pressure pump is in the VST We've stocked a huge selection of replacement high-pressure fuel pumps for your Yamaha outboard engine. Yamaha 150 Ox66 Saltwater Series Manual Yamaha 150 Ox66 Saltwater Series Manual I have a very nice and clean 2000 yamaha 150 OX66 Saltwater Series motor with 560 Hrs on it for sale, changed all three low pressure fuel pumps, Update to yamaha ox66 surging. Good. Home. I have confirmed 12v to the main relay, and to the pump. 2000 ox66 250 fuel pump issues 05-19-2014, 05:50 PM. The solid red is positive to the relay The smaller yellow and black wires are the trigger circuit to the relay, the yellow being positive, the black being ground. Sort by Oldest first Oldest first Newest first Most reactions. I tried to run the bad motor with freed up injector pump (jumped out with 12 volts) and no good not even a cough. Results 1 to 5 of 5 Thread Tools. Last time I went out, the motor kept surging rpm's and would - Answered by a verified Marine Mechanic If the low pressure side is adequate, but the high pressure side is low, then the high pressure pump is going to be bad. Any fuel pressure gauge will work or you can buy one from Sim Marine (google them). have been trying to get to the bottom of this problem for over a year! (35 psi), changed all the lift pumps, changed the main fuel pump, changed the filter on the fuel pressure regulator (easy to miss) and running a new fuel tank. 5 ohms on the lowest setting on both my digital and new analog meters. rogsnow New member. 2000 150hp OX66 --pump makes no sound when key is turned onremoved pump from tank . 5 My 2000 Yamaha OX66 250 HP Fuel pump will not cycle on when Key on. your describing a clogged regulator screen causing to much fuel pressure or a leaking fuel pump diaphram. Joined: Nov 2010. It's in the fuse box on side of motor. it has 3 lift pumps that like to fail and an electric high pressure pump. LP Fuel Pumps - April 2017 VST Filter - 20 Hours VST Pump - April 2017 O2 Sensor - NEW Reply Like 10-02-2017, 08:55 AM Excessively high fuel pressure can result in surging as well. 1998 225 OX66 not getting fuel 06-16-2009, 08:15 PM. I can hear/feel the main relay clicking at key on, I do not hear or feel high pressure pump turning on. Last time engine ran, measured 12 volt at pump fuse. Checked fuel pressure at Schraeder valve and it is a steady 35 psi while running on the hose. The cost difference between ethanol and regular Rec-90 is about 50 cents a gallon. these parts include o2 sensor,l/p fuel pumps high pressure fuel pump stator plug boots (found one out of It is a 2001 200HP ox66 (sx200TXRZ) It just hit 200 hours. abrngolf Cadet. After testing everything 3 more times I installed an electric fuel pump to bypass the low pressure pumps to completely rule them out. 3amp and this gradually fell to 0. Thor Outlaw New member. then a couple days later the engine blew a piston because the oil level sender failed and it ran without oil, no alarm, transfer pump works with manual switch, the float sensor itself failed. They can answer questions for any Yamaha outboard model or horsepower. I have a ox66 200hp. 1- yamaha oem trim tab. 99 225 Ox66 seems to want to idle around 500-600 rpms then dies. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Sellers with highest buyer ratings; Returns, money back; Ships in a business day with tracking; Yamaha OX66 Fuel Pump Assy 6E5-24410-10-00 150hp - 250hp 1999 - 2001. Page of 2. then after trying for about a half hour it would fire and go. Thinking maybe fuel pump stuck or bad. Before I get it rigged on the boat and try to put some time on it, I think it would be in my best interest to have the fuel rail and injectors professionally cleaned. X. If it is low your high pressure pump may be going or the VST screen (filter) may be dirty. Opens in a new window or All FPF fuel pump comes with lifetime free replacement warranty. The bulb pumps up fine and is not going flat. Yamaha 90HP EFI (2005-2016) 4-Stroke Low Pressure Lift Fuel Pump Yamaha 115 fuel pump high pressure easy install - YouTube. Yamaha 150hp efi 4-stroke low pressure lift fuel pump Yamaha 115 fuel pump high pressure easy install Yamaha ox66 high pressure fuel pump failure. I rebuilt the low pressure fuel pumps and water pump, replaced the fuel filters and as general maintenance items. Boat was bought used and came with a low pressure fuel pump that replaced the primer bulb. 8 volts. I am sick of buying them. 9) link and synch and set TPS. There is a different part # for <2001 and 2002> high pressure fuel pump. It is the large aluminium casting that is on the Port side of the engine. Oh, I found one other problem - the high pressure fuel resistor when measured was out of spec - it is supposed to be 0. fuel pressure is perfect ever since. Yamaha & Suzuki Outboards . 5 Liter High Performance; Mercury - 3 Liter & 3 Liter High Performance; Mercury - 4 Stroke / Verado; Suzuki I've got a 1999 Yamaha 150 ox66 fuel injection and having trouble running it past idle speed. to/4aTFM3zWire - https://amzn. When I put fuel pressure gauge on I have 35psi at idle but it drops when I throttle up. Super Moderator Customer: l have the 2001 Yamaha ox66 model problem is it won’t stay on for more than 3 seconds changed spark plugs, high pressure fuel pump and cleaned injectors. Please help!!! Mechanic's Assistant: Sometimes boat issues seem like they'll be really complicated, but end up being Re: Yamaha 225 OX66 shuts down your describing a classic fuel starvation on an EFI motor. Chunk missing right Get the best deals for Ox66 Fuel Pump at eBay. <br /> old gas tends to eat at the plastic and rubber pump parts. What to look for when installing the pump. 1999 ox66 225 fuel pump ground issues. I cannot find any leaks in the fuel line and the line is ethanol resistant and was replaced recently. Joined Oct 10, 2006 Messages 2. I searched far and wide for a video about replacing your lift pumps with a electric holly or carter like everyone talks about. Doesn’t want to start easily but give it a mist of mixed gas or anything else and fires right up. Everything was fine until I noticed this pump was running all the time and then it stopped working. will not get up on plan. New spark plugs. rodbolt17 Yamaha Outboard Forum . 2003 VX225TLRB Yamaha Outboard FUEL INJECTION PUMP Diagram and Parts Part 52 I have a 2002 OX66 250 HP Saltwater series 2 stroke. The service manual provides instructions for relieving fuel system pressure. 4) clean fuel injector screens 5) clean/test O2 sensor for proper output voltage. #yamaha outboard motor vstThis video will show you how to test your Yamaha outboard motor fuel pump needle valve is working properly. View All; Barbeque Grills 2002 Yamaha 150 OX66 Fuel Problems 2002 Yamaha 150 OX66 Fuel Problems no pressure switchs. Check the three low pressure pumps. i have fuel all the way up to and in the vst. Yamaha Outboard Forum . Its a much easier way for me to learn so hopefully others will enjoy it to. The three low pressure pumps are on the port side of the motor. 5 - 14. Limped it home, and it will not maintain idle speed below 1300 RPM. Feb 6, 2011 reset the TPS (. It reads low or almost no voltage. Fuel is getting to cylinders. The motor is a 2005 Yamaha f90 4stroke with about 500 hours on it. it has 3 new oem lp pumps, the injectors were just cleaned ultrasonically. Spark gap good. High pressure pump working fine - 35 psi of fuel to intake. No fuel pump pressure and I can hear the relay click, but the high pressure pump isn't turning on. Post Cancel. Model VX225TLRB. JohnOrrett. to/3HlXhfsSpade Connectors - ht 2003 yamaha 250 ox66 bogging down 06-13-2017, 10:08 AM also i have checked the pressure on the fuel rail and it s right on the money and with the gauge hooked up and running along it never drop pressure . 6 psi EFI and HPDI models- the pressure must not drop over 10 psi over 1 min period. But you want to start by running it on the portable tank Buy Jet Ski Plus High Pressure Fuel Pump & Filter Kit Compatible with Yamaha/Fits MANY 2000-2015 150 175 200 HP Outboards (See ad for exact model & year fit): Fuel Filters - Amazon. Drive Gear 61A-11536-00-00. 45 (I have ordered a This fuel pump fits the Yamaha V6 225 OX 66 Saltwater Series II 2-Stroke outboards (Made between 1999 and 2002). As such, I have a stuck high pressure pump and the injectors are probably gummed up as well. (Helps if you have two people) If gas is leaking out the back of the low pressure pump it is bad. 5 volts when throttle plate is completly closed) changes all fuel pumps (lift lumps and high pressure)and had all injectors cleaned and tested. Lately its been giving me a little issue, when I'm running on a flat day it runs like a champ with no issues. builds pressure up to 36 psi then will kick off need to monitor pressure at schrader Last edited vapor tank is the large aluminum tank on port side and the high pressure filter inside should be cleaned yearly. ox66 HP fuel pump 05-27-2015, 09:32 AM. Ran it will the fuel guage while running. 2001 OX66 poor fuel mileage 09-20-2007, 05:49 PM. Good voltage to pump. I am 99% sure this is due to fuel that wasn't treated and/or drained from Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. ox66 250 fuel injector and pump problem. Thread starter Thor Outlaw; Start date Jul 14 , 2020; T. If one goes, you may notice bogging at high RPMs. Thread starter Js sea ox; All fuel that came out was nice and clean. $32 shipped to my door with all hardware! look them up on Facebook or email them at speeddoctorma LP Fuel Pump? ~ Yamaha 1999 200HP OX66 01-11-2011, 10:56 PM. - - 2002 yamaha 250 ox66 stator/pulser issues i didnt test the fuel pressure under load. 57 ohms. I am thinking the HP pump may be bad or stuck, anything else I need to check or anything I can do to keep from having to buy that high dollar pump. Amp draw was 2. 2001 yamaha ox66 225 fuel problem 3 lift pumps and I reccomend doing 3 at a time. 2000 Yamaha OX66 250HP SX250TXRY 61AX103847T Yamaha Motors; 200 OX66 Won't start (fuel related) Thread: 200 OX66 View Forum Posts Private Message Member Join Date Jan 2011 Location Rockwall, TX Posts 319. Auto parts & accessories auto yamaha outboard fuel flow sensor fuel. E. Reading all the threads on this the most likely culprit is one of the fuel pumps. test and confirm high pressure pump operation Joined Sep 7, 2008 Messages 8,953. Does any one know what the micron and efficiency ratings are for the fuel filter that is between the vst and the high pressure pump ? My engine is a 2001 LZ200TXRA Tags: None. 1) replace low pressure fuel pumps 2) replace/clean VST screen and o-ring. Items are sold as is shown and described above sold as is with no refunds or returns accepted. ox 66 low pressure fuel pump. High pressure pump is almost new. Is this aftermarket pum This fuel pump fits the Yamaha V6 200 OX 66 Saltwater Series II 2-Stroke outboards (Made between 1999 and 2002). you either have a restriction, bad lift pumps or a clogged VST screen or possibly a bad fuel pressure regulator. I prime my bulb every first crank of the day, and prime the bulb if I have been trolling a lot. The starboard engine has been acting up lately. Last thing to try is the check valves in the vacuum line behind the VST. 1- yamaha oem anode. 1999 Yamaha 200HP Ox66 NoLow voltage at fuel pump. If your 2002 Yamaha OX66 225 engine is not starting despite having spark, a new high-pressure fuel pump, three new low-pressure fuel pumps, all new fuel filters, and new spark plugs, there are several potential reasons for this issue. That way you can just rotate them whenever you need to service the vst What would cause the low pressure fuel pumps to not pump enough fuel? I installed new diaphragms and gaskets even tho the old ones still looked good. Checked compression. Guest. the low pressure pumps are just to the right of the tank and both are relatively easy, just ensure you close the tank correctly or you could have gas squirting under your cowl. C. if ECU voltage drops it automatically goes into ECU bypass Looking for others who experienced problems with 2000 Yamaha 225 HP OX 66 whose fuel pump needed replacement after storage. Thought about changing the high pressure electric fuel pump but don't want to just throw money so the issue randomly went away, jsut as it did in our other engine. drop rail pressure below about 25 PSI with the throttle open and it shuts down just about like you switched the key off. <br /> all it is is a gas tank that the high pressure pump can draw from. Re: 150 ox66 fuel pressure regulator I bolted the new regulator on and it's running great. While checking the fuel pumps today I will also check the pressure reg. I have a 250 it has 3 low pressure fuel pumps, one of these had a hole in the plastic diaphragm, caused the same problem it is easy to replace and Yamaha & Suzuki Outboards . delt with the water in fuel. I run twins on a Grady White 272 sailfish. if 12 volts is applied to pump terminals will this tell me if pump functions okwould appreciate any help Low pressure fuel pump replacement on my Yamaha sx225txry. I just ended up replacing the whole pump. <br /><br />I followed all Yamaha's Go over to the Yamaha section at bass boats central and do a search for the replacement of the two/three mechanical lift pumps with one electric fuel pump. I have just recently purchased a boat with a pair of '99 Yamaha 225 OX66 engines which have been sitting for over a year. I also tested the electric fuel pump resistor's resistance. Low pressure fuel pumps: The 225 has three of these and they are supposedly a known fail item. A couple of side notes: If you have an efi yamaha and buy a vst gasket, save the old one as it will shrink back to size after all of the solvents have dried out of it. Can someone tell me how much to torque the bolts when I replace them? Looked all over the manaul and cant seem to find it. New pump (about 2 hrs. The red wire with yellow tracer is positive from the relay to the fuel pump. Buy Fuel Pump for Yamaha 150, 175, 200, 225, 250, 300 HP, LZ, VZ, V, Z outboard engines, replaces 68F-13907-00-00, 68F-13907-01-00, 60V-13907-00-00: Electric Fuel Pumps - Amazon. However, when I turn key ON, pump will not energize. Collapse. Search. /value for high pressure fuel pump "resistor" which is a unit on top of engine . hope this helps casey_4120 I recently purchased an '00 Yamaha 200 OX66 that sat for about 2 year w/ unstabilized fuel in it. I have seen others wire in differently. 2001 Yamaha 225 Vmax EFI OX66 3. Jump to Latest I’ve been told to replace it every 300 hours, or immediately if the motor starts to “bog” at high RPMs. Your high pressure fuel pump No pressure from HP pump, when I turn the key I hear the pump click, I do not hear what sounds like it running. 2. Then other pump(s) - I think your engine has 3 - 225 ox66 problem. I am thinking mid-range fuel pump unless somebody has any other ideas? R. Use or borrow a 6 gallon gas tank and try that. Pulled all 6 spark plugs and did not smell any gas. 8) inspect/clean out popit valve; PRV. The engine will stall at low idle and at high RPM (above 4,500 RPM). Going to look at the manual tommorrow, but any advice to get me started This fuel pump fits the Yamaha V6 150 OX 66 Saltwater Series II 2-Stroke outboards (Made between 1999 and 2001). The "high speed pump" is actuall called the high pressure pump, an electic fuel pump that increases the fpressure to about 30-40psi as it is pumped to the injectors. Fortunately, the low pressure fuel pumps are relatively inexpensive (compared to the O2 sensor) and easy to change. LP Fuel Pumps - April 2017 VST Filter - 20 Hours VST Pump - April 2017 O2 Sensor - I had a 2003 ox66 that had a fuel pump resistor wired in the pump circuit, if i remember correctly it was a 2 wire pull apart connector on top of the motor in front of the flywheel. Search Search Reset. Jul 14, 2020 #1 Hey All, Ive got a 01 150 OX66 with a new power head (approx 70 hours). Login or Sign Up 2000 Yamaha OX66 250HP SX250TXRY 61AX103847T The fuel pressure from the regulator is higher when the manifold pressure is higher (throttle opened) and lower when the manifold pressure is lower (throttle I have . Boat: 1989 Mako 231 with A&amp;J bracket. I have twin 1999 Yamaha OX66's. Especially in low use boats, combined with the low quality OX66 High Pressure fuel pump aftermarket replacement. running). It usually will unstick with a couple taps. using the "T" fitting in the line comming from the fuel pump to the bottom of the fuel rail it was very erratic. fits 1997-2001 Yamaha 200-250 Marine Outboard Fuel Pump - Replaces Yamaha 65L-13907-00-00, 66K-13907-00-00 ; direct Fit - OEM replacement, 100% identical in fit and function In the mean time, I tested the fuel pressure regulator as stated in the manual. Anyone know what the On a fuel-injected outboard, you have several fuel pumps, with different functions. '97 225 OX66 Yamaha WOT rpm loss with a twist I had a I recently purchased an '00 Yamaha 200 OX66 that sat for about 2 year w/ unstabilized fuel in it. Good luck! Keep us posted. Primer bulb ( new Yamaha ) not getting fully hard gonna change on board filter again and than clean/check fuel pick up as suggested then another inline filter to the VST tank (which has yet Hi everyone, I have removed my low pressure fuel pumps and installed a 10 micron Yamaha water separator, Relay and Carter Fuel Pump. 1 - qt- yamalube gear case lube. 1 out of 5 stars This high pressure fuel pump assembly fits the Yamaha F300, LF300 and LF300 300HP EFI 4-Stroke outboards (All Models 2011 and Newer). that the lines are supposed to keep pressure. Any thoughts? Save Share Reply Quote Like. The engine is turning over and has a spark on all 6 plugs, but the pump is not With the 3-pos float switch harness unplugged I noticed that upon keying the ignition from the off to on the ECM first cycles the high pressure fuel pump and then turns on the remote oil pump which then stays on until you either shut the key off or ground the blue/white lead of the engine harness. Fuel pressure regulator screen OX66 06-15-2016, 01:31 PM. 6 months, and when I attempted to start engine after 6 months storage it would not start or run. So I swapped out with one of the Check your fuel pressure when it is hard to start and see what it is. None of this has . my motor is an 01 0x66 225. Because the manifold pressure will be as high as it can be. Unplugged the high pressure fuel pump leads and checked for voltage with key on, got 11. 3374 posts Item for sale is a used resistor (65L-85370-00-00) off of a 1999 Yamaha OX66 225 hp 2 stroke outboard motor. UPS Next Day and Yamaha OX66 High Pressure Fuel Pump Failure | 2 Cool Fishing Forum. EvansMarine. Joined Jan 20, 2023 Messages 13. We also carry the low pressure fuel pump, which can be found here: Yamaha F300, LF300, FL300 Low Pressure Fuel Pump We stock all of our products and ship quickly (usually either the same day or next business day) from you have a 3. Only a few more $$ than rebuilding the originals. Speak to an expert: 1-888-352-1568. Unboxing and inspection of the pump. Several claim they have been running this Hi Everyone, 2000 Yahama SX 250hp OX66, 3 blade prop 15-1/4&quot;X15&quot;-M. test fuel pressure 6. I was having a stalling problem, determined the problem was electrical. builds pressure up to 36 psi then will kick off need to monitor pressure at schrader Last edited Outboard bornagainboating Yamaha ox66 high pressure fuel pump failure How to tell if your outboard fuel pump is bad. this was months before this issue. No power to pump. If not it could be the high pressure fuel pump is bad or the relay that runs this pump when you turn the key. 5 Liter High Performance; Mercury - 3 Liter & 3 Liter High Performance; I have changed All low pressure pumps, every filter, cleaned screen on fuel regulator, injectors just serviced, vst filter, TPS checked out when I tested, Cleaned O2 sensor and Inside the channel, O2 sensor checked out following Yamahas check, Tried on external tank and did the same, check fuel pressure and was at the 37 2001 250hp Yamaha I have a 2002 Yamaha 225 OX66 motor that looses electrical power every so often. HIGH & LOW Pressure Fuel Pump For Yamaha 200 - 250 HP 4-Stroke 69J. <br /><br />I did clean the filter in the bottom of the VST, moister sep and inline filters. Turn ignition key ON/RUN for 5 sec then turn OFF and observe the pressure reading. I've never replaced the high or low fuel pump diaphragms, could that be the cause? Hope someone can help. The fuel pump relay turns the fuel pump on and off. It never even dawned on me that the pumps made by Mallory would be any different that the O. also you will need 1 vst tank o-ring , fuel I'm having a fuel problem with my 2001 Yamaha OX66 250 hp. If you really want to be frugal, you can pull apart the fuel pump itself and replace the diaphragm or other worn parts My last boat had an E-tec motor, and ethanol fuel gummed up fuel lines, fuel pumps, and made a mess of it. The only trick is that you need to loosen the high pressure fuel pump assembly to get to one of the bolts on the middle pump (there are three). The prop and grass around the motor is full of gas and oil. Loosen it slowly with something under it to catch the But I JUST replaced them all only about 20 to 40 hours ago. (not long ago), along with a new Racor 10 micron water separator and on-board fuel filter. 0amps by the last second pump was Secondary fuel filter: In-line filter that separates even smaller contaminants from the fuel before it enters the VST. Where can I find a replacement for a Carter P61296S-02G19B fuel pump? -2004 Sx200txrc with 485 hours -compression 125 on all cyl +/- 3# -fuel pressure 37# -sparks tests out to 10kv and does not drop spark -only no ethanol -new as you have seen if any sensor is unplugged ign timing sets at 7*BTDC and causes a high idle. nickmo: 08-11-2010 06:31 PM: There's a drain plug at the bottom of the tank. 53-. Rain ended that session. But you want to start by running it on the portable tank Great point. I have replaced the water/fuel operator, and I have replaced the fuel filter, filter housing, and O-Ring, that is mounted under the cowling. Checked all three low pressure pumps and I also tested the high pressure in the driveway at idle and used a vacuum gauge to test whether or not the fuel pressure regulator would lower pressure when pulling a vacuum. When cranking almost sounds like no compression cranks fast. If the pump is running, the relay is working. should be the same. Joined Sep 1, 2003 The bulb pumps up fine and is not going flat. They wired it with a relay using a wire tied into the high-pressure pump so it will run when the HP-pump runs. For Questions or Customer Service Contact Stroud's Marine at (252)751-0415 Engine model: S225TXRX Re: 2001 OX66 225 VST operation double check all electrical connections, make sure there is no voltage on the brown wire at the starter solinoid with the key on. 0/ 2. builds pressure up to 36 psi then will kick off need to monitor pressure at schrader Last edited Re: 1998 Yamaha 225 OX66 SHUTS DOWN - Pressure & Amp readings Re: 1998 Yamaha 225 OX66 SHUTS DOWN - Pressure & Amp readings I finally picked up the fuel pressure tester. The motor only runs at high idle (>1500 rpm) and is pushing to much fuel. Time. About forty bucks a piece. Check Details. I have the pump on bench for testing . Rpms are around 3000 or so. wop fugq nvrhxj msxyfs cwky zzic btxk edojmqdv ucyuuex kxojzm