Re: Prop pitch question

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gdcarpenter


Replies: 49
Topics: 3
#73087

Hi, looks like a GlenL ‘ZIP’. My GlenL ‘ZIP’ runs 29-30 MPH @ 5,600 RPM with a 1959 35 HP outboard.
(In terms of full disclosure it’s a Mercury Mark35A)

My best results have come from a 10" diameter 10" pitch prop giving me the above top end results, using a tach for RPM and a GPS for speed. A 12" diameter 11" pitch prop was too much prop for my boat, which weighs in a little under 800 lb. fully load for a days outing with 6 gal. of gas.

A tach is rally important to dial in your prop, so at WOT you are at or near max. RPM.