But with that increase in HP you should be able to run a higher pitch
prop. A 2" pitch increase at a prop speed of 2500 rpms should give you
4.7 MPH speed increase. My 9.8 would never be able to get to WOT with a
13" prop on my boat. But the 25 HP has no problem. If you do get more
ponies from an engine upgrade. You should look at changing the prop. A
prop turning at a certain speed is only going to go so fast not matter
how much horse power is behind it.
Paul
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