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Old 05-29-2007
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Not a simple question! I am assuming you want a fixed two-blade prop, not a folding or three-blade. The key criteria are diameter, pitch, shaft diameter, and right-hand or left-hand in selecting one. Measure the shaft - it's likely 3/4 inch, 7/8 inch or 1 inch. Determine the direction the prop will turn when going ahead: clockwise = RH, counter clockwise = LH. Diameter and pitch are trickier. I would try to get a recommendation on these from someone who knows the boat. For reference my CAL 9.2 (30 foot) has a 14 inch diameter, 10 inch pitch folding prop which seems to work well.
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