That's not as terrible as you think (to me, with a lower power 4 stroke). I get those numbers with a yamaha F100 on a 20 master angler with a 13" x 15" pitch 4 blade and a hydroshield. Probably similar prop RPM, higher engine RPM, as I have a 2.31 gearcase. I think a 15" pitch might be better- maybe with a bit of cup added, maybe not. With a 4 blade and less pitch, hole shot will be good, as will low speed planing, which is nice for the rougher stuff in a 20. They say a 3 blade will give a bit more speed. I never tried-I rarely get to use 28 knots in Buzzards Bay. I run almost the same top speed, just 1-2MPH slower with a 17P prop, but much lower RPM and crappy holeshot.
I don't know RPMs for that engine, but I bet you are a bit low.
If you want to go faster, I wouldn't suggest a hydroshield with it's drag, but it does seem to keep a heavy 4 stroke and kicker on plane better (like mine). You don't have that problem with a light 115 2 stroke. The normal fins on top of the anti ventilation plate will help you get it up on plane faster, if you don't have one.
Nice looking boat!
Last edited by FishStretcher; 04-14-2013 at 06:47 PM.
Reason: spelling
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04-14-2013, 06:42 PM
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