Re: Yanmar prop size
My suggestions:
Was the previous prop suitably sized, i.e. could you reach hull speed and max RPM at WOT with a clean bottom and prop?
Is your new transmission the same ratio as the old one?
There isn't much difference between the 3YM30 and the 3GM30 in terms of max power and max rpm however it really depends on transmission ratios and both engines had several ratios available.
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All men dream: but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find it was vanity: but the dreamers of the day are dangereous men, for they may act their dreams with open eyes, to make it possible. T.E. Lawrence
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