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Help with prop selection...
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<blockquote data-quote="dkuster" data-source="post: 331489" data-attributes="member: 6507"><p>I thought dropping pitch by 1 increases RPM by 200 (not 2000) ?</p><p></p><p>So to go from 3900 RPM to 5100 RPM (just barely in the recommended range for my motor) I would need to drop the pitch by 6, which isn't possible.</p><p></p><p>My current prop is a 3-blade, 9.25" 9-pitch.</p><p></p><p>The best I could find was this 4-blade, 10" 5-pitch prop:</p><p></p><p>https://boatpropellers.iboats.com/Mercury-Outboard-Propellers/?pitch=5.00&chart=43&engine_id=222&cart_id=652093117</p><p></p><p>Even disregarding the effects of the increased diameter and number of blades, the best I could hope for is 4700 RPM(!)</p></blockquote><p></p>
[QUOTE="dkuster, post: 331489, member: 6507"] I thought dropping pitch by 1 increases RPM by 200 (not 2000) ? So to go from 3900 RPM to 5100 RPM (just barely in the recommended range for my motor) I would need to drop the pitch by 6, which isn't possible. My current prop is a 3-blade, 9.25" 9-pitch. The best I could find was this 4-blade, 10" 5-pitch prop: https://boatpropellers.iboats.com/Mercury-Outboard-Propellers/?pitch=5.00&chart=43&engine_id=222&cart_id=652093117 Even disregarding the effects of the increased diameter and number of blades, the best I could hope for is 4700 RPM(!) [/QUOTE]
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