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Old 02 April 2013, 17:22   #101
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Country: UK - England
Town: Bristol
Boat name: loopy lou
Make: Avon Searider
Length: 5m +
Engine: Honda BF75
Join Date: Jul 2012
Posts: 128
I took the boat out today for a test with the engine a notch higher, What a difference it made it now feels much more stable.
Wondering if i would benefit from raising one more notch bringing cav plate slightly above keel ?

Also changed the prop from 13.5 x 15 to 13.25 x 17 the boat seemed quicker to plane, I had thought a smaller pitch prop gave quicker acceleration.

would it go even better with a 13 x 19 ?
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Old 02 April 2013, 17:36   #102
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Country: UK - Scotland
Town: Argyll
Boat name: Helena
Make: Birchwood
Length: 5m +
Engine: Inboard Diesel 250hp
Join Date: Jun 2011
Posts: 116
I would definitely go another hole or two. If you do go higher a stainless prop would be a better bet and cavitation won't be a problem other than on the hardest of tight turns. Just use trim and it'll be brilliant. We have a 90 opti on our boat and we've got the hull in line with the top of the water inlet so cav plate is about 2-3 inches above the bottom of the hull. We're running a 23 pitch laser prop and no cavitation. Best way is trial and error as every boat needs a slightly different setup. Good luck though.
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