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Discussion Starter #1
If anyone has some ideas on this:

On a Yamaha 1999 GP1200x

Jumped a wave then when landed, loss of power and rough running.

Checked the plugs and the number 1 cylinder spark plug had zero gap as if something pushed it closed. No obvious damage to piston. Out of water seems to run ok.

Checked the compression on all cylinders and #1 cylinder was 65 PSI and other two were 110 PSI.

Any ideas as to what I should do? And what may have happened?

Thanks,
Bruce
 
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