And then the high pressure HPDI pump. The regulator in the HP pump might not be holding. J. Jonny2490 Cadet. Thanks a bunch. Those filters do clog fast with the fuels these days. You need to make sure you are able to maintain fuel pres to the high pressure pump. It is not hard to change, but be sure to read about it online before you try it. ecu only reads high presure,try resetting vst float level and pay close attention to the needle:D. I see that there is only one fuel pressure sensor and it is in the high pressure pump. I also drained the VST. The VST tank itself shouldn't need replaced but even the gasket that seals the top and bottom half can be $43 from Yamaha. Can't say that this is your problem but there real cheap and pretty easy to change out. I have twin 2002 HPDI's that are just shy of 800hrs. Hopefully they will give it a test run on the water or put a test prop on it and run in their tank. The electric high pressure fuel pumps can approach $800 and even the filter that mounts on the bottom of it can exceed $100 depending on the model you have. I have no clue where to check/change it. The medium fuel pump in the VST pressurizes the fuel to 40 psi. I replaced the VST filter, HP fuel filter and those little bastard basket filters. It is a small screen and I have not checked that. Both the pump and injectors should be pulled (not easy) and sent away periodically for cleaning and flow testing. Post Cancel. always remember with HPDI you have 3 pump pressures. HPDI FUEL PUMP DRIVE BELT: 2: S3220SUL: S3220SUL RACOR FUEL FILTER: 2: Comment. $69.95 Yamaha Outboard Fuel Injector Filter Baskets HPDI Z, LZ 150hp 175hp 200hp FSM017. The guy brings me this boat with a 2001 150 HPDI. This will cause bleed down and the pump will not make pressure. I can't stress enough to keep clean and current fuel in your rides.. Well it had been fine for a while but it is now doing it again. also what year is this engine? Hook up a fuel pressure gauge on the test port at the VST and run the boat. I heard back from the stealer I mean dealer today and they said that the high pressure pump is only putting out 50 PSI at the fuel rail and that it needs to be replaced or rebuilt. I think we may be on to something. Spark Plugs. I will have the boat back here on Monday and will go back through the VST and the high pressure pump looking closer for any screens that may be clogged. Changed out the filters and still have the problem. The RPM range is good up to 3500 RPM's any more throttle from there only seems to flatten it out. Yahmaha hpdi 250 hp high pressure fuel line repair - YouTube Yamaha has had a fit with … Yamaha has developed a high-pressure direct injection system (HPDI) that's used on seven all-new 2.6-liter 76 degrees V6 engines in 150- and 200-hp ratings. You also need to have the diagnostics running when this happens to see if you are losing high pressure. Fuel pressure needs to b 40 to 50 PSI at all times. These are the correct 14mm filter that come in the stock injectors and in the HP pumps. You need to make sure you are able to maintain fuel pres to the high pressure pump. Here again it depends on the model you have. It really too bad we can not purchase replacement filters for that pump. Jan 21, 2014 #4 Re: Yamaha 150 hpdi I did have the engine Running when i tested the hp pump and the pressure was good besides that i have not Done anything with the injectors since … Now I have 50 PSI ant the test port and the motor starts and runs great until you get up to about 2500 RPM in the water then it starts to miss and sputter like it is starving for fuel. Pull the throttle back just a bit then the fuel pressure comes back. Removing the HPDI mystery filter form the pressure regulator will cause debris to settle on the seat of the pressure regulator valve. All the filters on the engine have been replaced 18 running hours ago. The Motor has like 16 filters and only 3 are replaceable. Does that motor have the cheap little basket filters. Just because you replaced the filter 18hrs ago doesnt mean it is good now. Thanks vectorpat, I dont see alot of 2.6 HPDI's. There is the need to test pressures while problem is occurring. The only way to do this is with a gauge connected at the VST. $9.25 $ 9. 15% coupon applied at checkout Save 15% with coupon. Fuel pressure and spark. 200 Yamaha HPDI. If you have good pres there and are still loosing high pres make sure the big metal filter on the outlet of the VST has been changed, if so then your high pres pump needs to be looked at. I have heard and read that there is oil in the high pressure fuel pump that should be replaced and at least checked. Yes there are filters in the pump and that is possibly the problem. It really does sound like fuel delivery but it's hard to rule out a wayward sensor on these motors. The brain of the beast is a TCI microcomputer. One could not be brought back so I replaced that one. You can test that theory without taking the fuel pump off your motor and without returning to shore. 2000 yamaha 150 . 1 5 5. 1 5 5. Vast improvement, but the high pressure and low pressure drop near WOT. FREE Shipping. I will keep you posted. I have a Yamaha 200 HPDI that I am having an issue with. From 3500 up to WOT 5 psi @ lift pumps, 51 psi @ VST and computer states "normal" for high pressure pump. You plug the laptop in and there are pressure transducers on the HPDI pump to measure the pressure. Bruncato serviced the injectors. likely a fuel restriction or pump going out. HPDI Fuel Pressure Regulator. 2001 Z150TLRZ Yamaha Outboard VAPOR SEPARATOR 1 Diagram and Parts, 2001 VZ150TLRZ Yamaha Outboard VAPOR SEPARATOR 1 Diagram and Parts, If this is your first visit, be sure to Make sure you relieve the VST fuel pressure before attempting to change this filter. Also you can check or change the oil in them There is a top and bottom screw to fill and drain the pump oil. Guess they want you to take it to the dealer. No visible air in the clear section of hose I use when testing fuel systems. Is it lean or is it maybe going into limp? 99. Then after that these services should be done every two to three years depending on amount of use. Yes, I replaced #20 and #28 and the electric pump. The boat is now at the dealer to see if any codes are in the ECU and to have the high pressure pump tested for correct operating PSI. Yamaha does not endorse nor give instructions for opening up that HPDI pump. Baskets Can be removed with a … 05-20-2016, 05:59 PM. I have seen many issues with ethanol clogging filters in less time than this. There is a bulletin where flagship is cleaning the pumps now also. The motor will idle fine , off idle and thru to plane fine , but if you push to WOT it will go flat. Page 58: Measuring The Fuel Pressure (High-Pressure Fuel Line) Periodic checks and adjustments Measuring the fuel pressure (high- pressure fuel line) 1. On a 2.6 HPDI you see around 700psi the 3.3ltrs read around 900-1000psi. Free Information----- High Pressure Pump Filters are located in the head of the pumps it is relatively easy to replace them but it is high recommended red lock tight is used on the bolts when reassembling. Hopefully they find something I have missed. Hard to say as those are Green engines and require special knowledge and test eqipment. Compare with similar items. The 150 hpdi … The #2 cylinder of this powerhead is famous for blowing up. Any questions, please do not hesitate to call 1.800.381.2065 for more information. Thanks, Copyright © 2000 - 2021, Outdoor Network LLC. Thanks. But over all your maintenence will be minimal. if you think the motor is leaning out it might be a good idea to check your fuel pressure regulator because with a gain of rpm you should gain fuel press. 95. Also I had installed a reman powerhead late last season. If it is low, then the fuel pressure needs to be checked out of the lower pressure pumps. this is a complete video from start to finish. I replaced the mid pressure filter and the screen on the mid pump, I took the high pessure pump off and went through it and found it to be very clean. The Yamaha Diagnostic System gives me a low pressure reading, is this derived from the high pressure sensor? $49.99 $ 49. There are 2 low pressure pump, 2 medium pressure pump, and the HPDI high pressure pump. 8 months ago by Kevin. I pumped all the fuel out and replaced the fuel line and primer bulb before trying to start it. If an injector clogs it stops lubricating that cylinder and power head failure intervenes. If you have good pres there and are still loosing high pres make sure the big metal filter on the outlet of the VST has been changed, if so then your high pres pump needs to be looked at. I have been working on this motor for a while and can't see any obvious problems. The only thing you can do, if so inclined, is change the two "mystery filters" on the fuel intake lines. It was the filter in the high pressure pump. This page was generated at 1 minute ago. 8 months ago by William. Remove the cap 1. Full replacement video for low pressure fuel pump on a 2003 250 HPDI Yamaha outboard. since the introduction of the HPDI, other than trash filled pumps, I have only seen 1 high pressure pump failure. HPDI stands for high pressure direct injection. Do you know if that 50# came from the computer read out for the high pressure side while at the problem RPM or just idling? The motor would not start or even try. I believe changing the pump oil and belt is … Including the one in the VST and the one out to the high pressure pump. low pressure lift pump yours has 2, medium pressure(50 PSI) pump in the VST that feeds fuel via an inline filter that can and will clog to the high pressure belt driven pump. $8.99 Marine Pro O Ring, VST Seal Yamaha V6 EFI 1999 & Up only. The high pressure regulator inside of the pump is bad. I have a feeling when I get the pump back I will have the same problem. Parker Yacht. I have seen them clog in less than 2 hours, if the fuel is 45-60 days old or older... the pump filters WILL fool you... we have had excellent results cleaning and flowing them, but we use Heptane as the flow liquid, and varying test pressures, and a different liquid process for the ultrasonic cleaning... Heptane ain't cheap by the bucket, but neither is a powerhead, so we don't skimp.. I am loosing high pressure, it drops off at about 4000 rpms to a variable 200-400 range. $7.50 shipping. So basically the high pressure pump is not boosting the pressure at all. Thanks guys. I just replaced every filter including mystery filters. It is the Yamaha Diagnostic System Version 1.32. FREE Shipping. astrobud311---Here is a link to a parts diagram can you tell me if you are talking about part # 15 ? Your expenses will be minimal. They tend to clog with debris dissolved in gasahol. 4.7 out of 5 stars 23. Let me know what you think. There are some fine micra screens in these pumps and they dont like ethanol ask any mechanic. Have you done a plug check? Problem fixed: Engine won’t stay running, runs rough. They fit Yamaha outboard motors 2000 and up HPDI LZ, Z 150hp 175hp and 200hp and should also fit VZ models. Needs to connected to computer diagnostic to see if high pressure pump is at 750 PSI or more. You can only get 3500 RPM's at most. $78.49 $ 78. If pressures stay in spec then do like Sparkie said and pull and have the injectors tested and cleaned. VST Fuel Filter For Yamaha Z150-Z300 HPDI - 18-79904, 68F-13915-00-00. Yes I have replaced that filter and it is 18 hours old. The fuel must be at a precise pressure for the fuel injectors to perform correctly, and thus the engine to run … I wonder if that little screen #15 could be clogged and maybe that regulates the high pressure. No power increase with more throttle. The 300 HPDI is a 3.3 liter 76 degree block that has a 3.66 bore x 3.23 stroke, six throttle valves, and six high pressure direct injectors that push fuel at 1,000 psi. Let you know. I replaced the mid pressure filter and the screen on the mid pump, I took the high pessure pump off and went through it and found it to be very clean. Were does the ECU receive low pressure fuel readings from? FREE Shipping by Amazon. other than that maybe a sensor or something. Your not supposed to disassemble the pump to clean the filters. Install the fuel pressure gauge onto the pressure check valve. Good luck on finding the filters. I am not real familiar with HPDI motors but I would assume they have some type of injector like my 4 stroke...you probably have clogged injectors, send them off for cleaning and flow testing/pattern test. Remember 2 and 3 won't have spark unless in gear. That pump is about 1200.00. The filters in the high pressure pump can clog too. Repair Difficulty Easy Repair Time Less than 30 mins . Wouldn't go above 3600 RPM at WOT. Tip: Yamaha four-stroke outboard timing belts and HPDI ® two-stroke outboard high-pressure fuel pump belts are cogged and Kevlar®-impregnated, making them super-tough and non-stretchable. You need to be monitoring the high pressure side as well as the medium pressure while the problem occurs. but this is coming from a student at marine mechanics institute if im wrong please inform me because im tryin to learn all i can. I checked for voltage at the mid pressure pump and it was good but the pump wasn't running so I pulled the pump out and replaced it with a new Yamaha pump. But from 3500 RPMs to WOT it flattens out, pull throttle back some and it picks up. Replaced the two low pressure fuel pumps. What kind of software are you using? If you are seeing something that says normal you are in the wrong screen on YDIS. No, it would be too hard for me to monitor the vacuum and pressure while running the boat by myself, I would probably kill myself LOL. is it from Yamaha? Outboard Fuel Pump OE 60V‑13907‑00‑00 Replace Fuel Pump Module Fit for Ya_maha 200‑300hp 3.3L HPDI 2003‑2015. The only thing different you will need to compared to a normal old two stroke is if the old owner has not had the oil in the high pressure pump changed you will probably want to have that done and also have the medium pressure pump filter and high pressure pump filter done. TPS and o2 in spec? 25 $16.75 $16.75. Or the HPDI pump itself is bad. 49. with vac, fuel lift and fuel pressure gauge hooked up so you can watch them. High pressure fuel pump: Also known as the VST pump, it pressurizes the fuel before sending it to the fuel rail. Secondary fuel filter: In-line filter that separates even smaller contaminants from the fuel before it enters the VST. Joined Jan 14, 2014 Messages 7. Can anybody tell me what else to look for that would cause this problem? We service Yamaha HPDI Pumps and direct fuel injectors for people nationwide! 4.8 out of 5 stars 95. I think it is #20.

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