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Old 03-31-2021, 09:18 AM   #6
High Wire
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City: Cape May, NJ
Vessel Name: Irish Lady
Vessel Model: Monk 36
Join Date: Dec 2007
Posts: 4,964
Agree the short answer is no for older mechanical injection engines. Huge difference between the fuel consumed in neutral at 2000 RPMs and fast cruise at 2000 RPMs. The newer computer controlled engines can.
So until you get some useful fuel data, you could build a simple RPM/Speed table and cruise about 1 knot below calculated hull speed.
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Archie
Irish Lady
1984 Monk 36 Hull #46
Currently in Cape May, NJ
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