Cavitation problem
Hi
I got a 20 Lund Alaskan with a 50 hp Honda.
The problem is that the prop loses its bite when there is any chop in
the water (2' seas). The RPM will run up to 6500 and I (quickly) have
to back it up to about 3000 before it gets it bite again. A real
pain. The Transom height is lined up with the plane. The motor has
been maintained. The Prop is an 11.2 X 12.
The Advise I got so far is:
The Lund rep told me the engine size is too small and for that boat it
should be 75 hp min. Which I guess is what they come with now. It's
rated for up to 120 hp
Was told that a different prop size may help.
The boat will get up to 30 when empty which is more than enough for
me.
The problem is more prevalent when its got a load (800 lbs) (I lug a
lot of stuff with it).
If the problem could be fixed with a prop that does not lose its bit I
would probally opt for that since speed is not big a factor as cost of
a new engine.
Thanks for the ideas
Claude
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