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Prop choice: 12 or 13
Hi
I have a Tohatsu 40c (2 cyl) that now has a Tohatsu 10½ x 12 aluminum prop. The motor turns about 6000-6100 at full throttle (max allowed 5800). If i buy a stainless steel prop (I was thinking of a Michigan Wheel Rapture), should I get a 12 or 13 pitch? Someone told me that in a case like this, if the revs are slightly high, get a stainless prop with the same pitch as the alu prop, that'll take some rpm off, presumably because the alu prop flexes ever so slightly and the steel does not. The boat is 14 ft and weighs about 350+ kg including me. Comments? Suggestions? Rgds Alex |
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