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Old 10-18-2012
Waltthesalt Waltthesalt is offline
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Cal 29 prop size

I’m repowering from the original A-4 to a Beta 16. This requires a prop replacement as the diesel that turns at about ½ the A-4 rpm. Can I use a 12 in dia. prop?

I’ve assumed a 12” prop is the standard installation for these boats. The measured clearance to the hull from the shaft CL is 6 ¾” MWC and Gerr’s Propeller Handbook want a blade tip clearance of at least 15% the prop diameter. That would mean an 11” diameter prop or less.

Is anyone out there having any problems with a 12” prop on their Cal 29?
Walt Elliott
Kingston WA
Puget Sound
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