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Propwash A boat is a hole in the water into which you pour... good times!

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Topic Review (Newest First)
06-21-2004 06:10 AM
transom change

Didn't even think of renting a lift I will keep that in mind.
Modification went great and tested on Sunday.
dropped the engine the intended 1.5 inches all cavitation is gone. The bow has a much smaller bow up zone during acceleration. The only thing it has not corrected
is the porpoising. Time well spent overall.
Caught only one small 36" striper, on plugs. Would not take my fly even though they were killing herring.
06-18-2004 07:17 AM
Hawkeye You can rent an engine lift for $25 a day or $50 a week. That's what we used to get the engine in.
06-17-2004 08:20 PM
Changes made

Jim I was having trouble with cavitation regardless where I set the trim. As it turns out an 11/2" is the perfect number. Hole pattern on motor is spaced 3/4" apart. So I can raise back to original height or just half way. This new location coincides with
the bottom of the skeg which is close to an 11/2".
So I think this will be the last of the modifications to the back for a while. I will take what I get.
Part of the problem is this is a flat bottom boat. When I built the boat I did not accound for extra glass and epoxy and that is why the motor was a bit high. The whole job only took 2 hours. Next time I will build a lift of some sort so I don't have to go back to the dealer to lift the motor.
06-11-2004 08:18 AM
JimW You might also check the trim. I know if the prop is angled up too much you'll get cavitation.
I have no idea how far down the prop should be but would think it has to do with how far out of the water the hull gets when on plane.
06-11-2004 05:45 AM
More changes

I have been doing sea trials on the boat the last week or two. Motor break in and the like. Noticed that as soon as the rpm's
started to climb the motor was cavitating. I think what is happening is even with the motor is a bit high and the skeg is causing some turbulence. Does anyone know of an apropriate distance to drop the motor? The anticav. plate is currently even with the bottom.

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