The correct setting will allow your engine to reach maximum rpm (Nigel Calder says at least 90% of rated speed), under load (in gear) at full throttle. If you can't reach max rpm, you're over pitched. If you can run faster than max rpm, you're under pitched. Normal run speed is about eighty percent of max rpm. For anyone considering purchase of a feathering prop, get the largest diameter prop that will give you a clearance of 15% of the diameter of the prop between the prop and the hull. Three blade props run smoother than two blade, and are worth the extra money.
Alan Bergen 35 Mk III Thirsty Rose City YC Portland, OR
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