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#1
04-16-2013, 12:11 PM
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Very interested in this thread
I've got a 87 20sf (which I believe may be a little longer then yours) and I currently top out 33mph at 5500-5600rpm. It's a painted stainless Yamaha prop 17p. Out of curiosity what hole is your engine mounted in. Nice looking boat. 
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#2
04-16-2013, 10:24 PM
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The cavitation plate is about one inch above the boat bottom. 3rd hole but my transom was rebuilt to 25"ish so not factory specs. She is a 74 hull. If I had known where the motor would sit I would have built the transom higher than the 25 3/4" it is now.
If your running a Yamaha four stroke the 15 pitch Amita should get you a bit more speed/rpms but I was running a light load and 35mph at normal trim so we are pretty close I would think.
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