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Evinrude 1985 115hp V4 manual for RPM and Prop info
really what I am after here is a prop recommendation.
the boat and motor came with a 13.25 - 17" 3 blade aluminum prop. Yesterday on a beautiful day on the Hudson River the tach was showing about 6200 rpm at WOT. That sounds to fast. The river was a bit choppy but not too bad. I never run it that fast for more than a few seconds. I can imagine that the motor should run in the 5000-5500 range....
The 18' Outrage moves pretty well with that prop but I have read that I should have a 13 x 19 prop.
Sounds to me like you need either a higher pitch like you say, 19 or a bigger diameter. 13 seems kind of small to me. You might try a 14 1/2 or 14 3/4 X 17. I'm no expert, but I just tested a few props on mine.
If you are lucky, Tom W. Clark will give you some advice.
