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hi


You are replying to:
NickD
Posted 4/17/2023 1:24 PM (#1019995 - in reply to #1019984)
Subject: Re: Alumacraft/Honda Propeller Recommendations




Posts: 296


Not sure what max RPM you are seeing but that engine has a 2.14:1 gear ratio. I plugged those into the Merc calculator.

45mph at 6000(max rpm per Honda) 18” prop yields 6% slip
43mph at 6000 18” prop yields 10% slip

Your loaded slip number would get you to 48mph with a 20” prop (provided you get 6000 RPM)
Your solo slip number would get you to 50mph with a 20” prop at 6000 RPM

Theoretical max for a 19” is 50mph and 20” is 53mp

Gonna be tough to get 50 out of that combo I suspect.

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