Thanks for the help
The complete engine ID is needed. It will begin with the number 6. One the side of the motor, on the decal, right below the model identity.
Under what operating conditions?
Is it temperature related or oil pressure related? What is your Yamaha tachometer telling you?
When replacing a shift cable you need a special 9/16" six pont socket about 4 inches long. Or a drilled out 3/8" extention drilled out so the
I switched the STBD side Diaphragm and T-stat to Port side and vise versa, and the "massage" was me bending and rolling