Yamaha 150 HPDI

Stevetillis

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Jun 8, 2009
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I am having a fuel problem with my 2003 Yamaha, 150 HPDI. We accidently put contaminated fuel into a 2003 2670 Glacier Bay and experieced fuel problems. Since then we have cleaned the tank as best as possible. The motor runs fine all day at 3600 RPMS but when pushed to 4200 RPMS or better, the motor ruuns for about 10 seconds and then bougs down. The bulb on the tank is staying hard and I pumped it to where it is hard when motor is starting to boug down. But no success. I performed the following.

Cleaned the fuel tank out
Replaced all filters from the tank back to the motor including the fuel strainer after the VST pump back to the high pressure pump
Cleaned the VST pump screen
Changed out the VST pump out with the other motor
Ran fuel from an isolated tank to the motor
Vented the tank
Changed plugs
Changed fuel sensor on rear of motor

What else is left to check? Is it possible the fuel injector screens are dirty. I am fairly mechanically inclined but this one has me stumped. All of the problems started from contaminated gas so it should be fuel related. Any thoughts from anyone who has experienced the same problems.
 
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