Re: Water Getting in Top Cylinder Yamaha 40hp Twin

[joesnuffy]

I have been inspecting the reed valves with a very bright light I forgot I had. The ones that the rod hit I see light coming through all 3 valves so I am feeling good about replacing them. All the other 9 reeds no light coming through them. The motor did run a lot higher rpm’s yesterday with the screws in the reed valves. The compression is so high on that motor I don’t think it will be the head or head gasket. I will replace the reeds first and see how she runs. If that doesn’t fix my issue I will rebuild the fuel pump got a new diaphragm coming at that time I will see if it has any cracks in it. Then if that doesn’t fix the issue I will change the head and put on a new head gasket.

Thanks for helping I really appreciate it,

Joe

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