Ideas on powerhead failure? Yamaha 150

scjmc

Petty Officer 2nd Class
Joined
Apr 30, 2009
Messages
121
Re: Ideas on powerhead failure? Yamaha 150

100% of fuel used in this boat since new has been non-ethanol. It is all purchased at the marina that the boat lives at. Their 90 octane remains non-ethanol. I blew air through the check valve. Some oil and a small amount of debris came out. Not much, only a few small particles. The lines themselves were non restricted.
 

scjmc

Petty Officer 2nd Class
Joined
Apr 30, 2009
Messages
121
Re: Ideas on powerhead failure? Yamaha 150

Powerhead rebuilt. No cause found for the cylinder failure. It has about 50 hours since rebuild with no problems.
 
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