Only 4500 -4800 RPMS- 90 HP Johnson on 20'SF

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Only 4500 -4800 RPMS- 90 HP Johnson on 20'SF

#11

01-06-2009, 06:09 PM

Fr. Frank

Senior Member

Join Date: Oct 2003

Location: Shalimar, Florida

Posts: 2,265

Re: Only 4500 -4800 RPMS- 90 HP Johnson on 20'SF

Smaller diameter will give you more RPMs. I think you'll need to go to a 15" pitch, though.

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'73 Cobia 18' prototype "Casting Skiff", 70hp Mercury

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