As an additional data point I also have a 3GM30F with the 2.61:1 transmission and I second the 16D X 12P option (My pro is a Martec Elliptec).
My boat is a somewhat different design but similar in dimensions and general hull shape. Following Martec's recommendation I tried 16 X 14 blades and it was a cavitating / vibrating mess.. For what I do 16D X 12P works fine with 7.0 knots top speed, tolerable vibrations, and somewhat mediocre astern performance. I'm on a smallish lake so unknown distant shores and busy seaways are just not part of what we do. I've also become mostly a racer and don't motor much. If I was on the coast or great lakes and traveled with the boat I would most likely opt for something with more braking power.. Many factors at play, what you primarily do with the boat and things like transmission ratios are key examples. Good luck as it can become a tiresome and somewhat expensive trial and error process.. Regards, -Francois Rivard 1990 34+ "Take Five" Lake Lanier, GA From: Tim Goodyear <[email protected]> To: David Jacobs <[email protected]> Cc: "[email protected]" <[email protected]> Subject: Re: Stus-List Propeller Question for 35-3 Message-ID: <cac9qatrtubuspwqh-rohh05qzcj0se3ysoyvckyvsjextyu...@mail.gmail.com> Content-Type: text/plain; charset="utf-8" The Flex-o-Fold was a 16x12 2-blade. This was with the Yanmar 3GMF / 2.61:1 transmission. We replaced the engine with a 3GM30F last year and that also works really well with the prop. Thanks, Tim
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