[JayBones]

New to this forum and thanks in advance for advice. Just picked up this 04 GP1300R that runs rough with no power on the water. Removed the plugs and found #3 cylinder very clean and the plug was wet with water. I own my own auto repair shop but no nothing about Waverunners. Has anyone run into this before? How should I proceed to find the source of the water in the cylinder?

 

[Ernest T]

If its just 1 cylinder, I'd suspect a leaking head gasket, or a failed exhaust valve. I think this model had the power valves, which are prone to failure.

 

[JayBones]

Pulling the head tonight, I just didn't know if there are cracking issues in the cylinders. Thanks Ernest I will let you know what happens.