my motor has no power but runs fine

by tony
(anderson indiana)

Can your help me?? I have a 1990 omc cobra 4.3 v6 and it seems to run fine but has no power. I dont hear any unusual motor noise, but the local marina says that I may have blown a head gasket except I do not see any signs of water in my oil. Is this true? because sometimes I am skeptical of what local marinas say. I can only go idle speed even when I give it full throttle, can you help?

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May 28, 2011
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mine does that too
by: Will

It seems to run ok but when I put it high throttle I do hear a slight knocking noise. Sounds fine in medium gear. but for the 1st time I had trouble starting it when I took it out last time. I took out the spark plugs and cleaned them ....they were wet with oil....it started right up....again when I was trying to start it later I had to do the same thing to both spark plugs. so they are getting wet with oil. could I have a blown head gasket?

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