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Old 03-03-2019, 09:02 AM   #2
O C Diver
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City: Fort Myers, FL... Summers in Crisfield, MD
Country: USA
Vessel Name: Slow Hand
Vessel Model: Cherubini Independence 45
Join Date: Dec 2010
Posts: 7,920
Within the same outboard class, HP often increases when the manufacturer increases the upper limit or the RPM and more fuel. I would start with what you have and change as you see the need. In a perfect world, borrowing a 15 and 20 HP engines would be the best way to determine what you need.

Ted
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