Also Sprach Paul Browne :

The motor is fine, shifting in/out of gear is fine. The only thing I can
think of is that the rubber is slipping in the prop hub. I tried having
someone hold the flywheel still while in gear, but I couldn't make the prop
slip on dry land. I don't see any signs of shredded rubber or anything
either, but I'm guessing I probably wouldn't anyhow. I know I can't put the
kind of torque on it that it probably gets in the water at WOT either. The
propeller is older, and was going to be replaced this season, so...

Take a marker or a bit of paint and make corresponding marks on the inner
and outer parts of the prop hub. Take the boat out for a run. If the
prop is slipping, they will not be aligned anymore. From your
description, it does sound like it is slipping.

Dan


--
Ah... memories, memories. Where is that brain damage they promised us?

-- Hunter S. Thompson.