Yamaha 2 Stroke 50 HP Losing power

gjr

Recruit
Joined
Jul 21, 2011
Messages
1
Recently my engine loses power to about a third of its capacity after about twenty minutes of running. Though I am at full throttle, it will not pick up speed again. Does the oil reserve have a default setting that could be responsible for this? I have taken the boat out of the water and gone over everything but each time I put it back in, the problem returns. Any suggestions?
 

harvey5560

Cadet
Joined
Sep 15, 2010
Messages
26
Re: Yamaha 2 Stroke 50 HP Losing power

i just had the same problem with my 2006 50hp two stroke. worked great one day then only 75 percent power the next.
turned out to be a slight restriction in the carbs. I had the carbs pulled and cleaned and now it runs great.
 

grizzleyjoe

Cadet
Joined
Jul 21, 2011
Messages
9
Re: Yamaha 2 Stroke 50 HP Losing power

I had the same problem . i also rebult my carbs and fixed it . from 6 mile per hour to 25 . ran gerat till i burnt a pistion up .. good luck safe boating
 
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