Re: Water Getting in Top Cylinder Yamaha 40hp Twin

[billw]

I have seen a couple of heavy use Yamasakis where the bearing cage for the upper crank bearing goes away. (It’s plastic, sometimes.) Then all the rollers work around to one side of the crank, causing it to thrash around and generally be noisy, spew some oil out of the top, but exhibit no other symptoms. Wondering if this is why your rods hit the reed screws?

Long live American manufacturing!