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Prop has no markings...what do I have/need
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<blockquote data-quote="bduffel" data-source="post: 239698" data-attributes="member: 7078"><p>I have an 87 Polar Kraft 16' with a 91' Merc 4 cylinder 40 HP ELPTO tiller motor. Boat and motor are great. Seems to struggle a bit on accelerating to plane but not bad and top speed seems OK.</p><p></p><p>Question is what is the original prop? The only markings on the aluminum prop are "20 / OR 11". The 11 could almost be "//" instead of two ones. It is a three-bladed prop.</p><p></p><p>The prop diameter is about 10 1/2" or 11" and it is aluminum.</p><p></p><p>Is there any way to measure and cipher out the pitch?</p><p></p><p>Just curious in case I want to increase the hole-shot and/or top speed; or just obtain a spare/new prop.</p><p></p><p>Thanks,</p><p></p><p>BDUFFEL</p></blockquote><p></p>
[QUOTE="bduffel, post: 239698, member: 7078"] I have an 87 Polar Kraft 16' with a 91' Merc 4 cylinder 40 HP ELPTO tiller motor. Boat and motor are great. Seems to struggle a bit on accelerating to plane but not bad and top speed seems OK. Question is what is the original prop? The only markings on the aluminum prop are "20 / OR 11". The 11 could almost be "//" instead of two ones. It is a three-bladed prop. The prop diameter is about 10 1/2" or 11" and it is aluminum. Is there any way to measure and cipher out the pitch? Just curious in case I want to increase the hole-shot and/or top speed; or just obtain a spare/new prop. Thanks, BDUFFEL [/QUOTE]
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Prop has no markings...what do I have/need
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