Yamaha 4 stroke "making oil"

[bobber]

I've seen it in some older John-Zuki motors- it was years ago and there was some kinda ring problem. they did a "leak-down" test to confirm

[numbskull]

I was told the wrong prop (resulting in overloading the engine for a given rpm) can also reportedly contribute to this.

[Rmarsh]

Originally Posted by numbskull

I was told the wrong prop (resulting in overloading the engine for a given rpm) can also reportedly contribute to this.

I changed out a dinged prop a while ago with one of a different diam and pitch.....never felt quite right....
Thanks ....I'll look into that