Thread: 1978 3.7 / 470. Alpha one prop size?
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Unread 10-25-2012, 08:34 PM
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spareparts spareparts is offline
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Join Date: Oct 2006
Location: Raleigh, NC
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21P is awful steep for that motor, how many rpm does it turn at WOT, I'd guess a 19P if you're just riding, 17 if you're pulling skiers
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