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Mercury Force 1998 50 HP Propeller Recommendation
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<blockquote data-quote="LDUBS" data-source="post: 511156" data-attributes="member: 21536"><p>So, at WOT, you need to be at 5300 rpms and you are confident you are at 7000 (YIKES!). What research would lead you to a smaller pitch (13P)? The general rule is stepping up by one pitch, will reduce rpm by 150 to 200. It seems going up one pitch (15P) you will still be significantly over revving that motor. I would caution against making inferences from this rule. You are so far off I would be uncomfortable you applying it based on my comments. Not sure it is even practical.</p><p></p><p>Are you absolutely sure the tach is correct?</p><p></p><p>Hopefully someone with more knowledge than me will chime in.</p></blockquote><p></p>
[QUOTE="LDUBS, post: 511156, member: 21536"] So, at WOT, you need to be at 5300 rpms and you are confident you are at 7000 (YIKES!). What research would lead you to a smaller pitch (13P)? The general rule is stepping up by one pitch, will reduce rpm by 150 to 200. It seems going up one pitch (15P) you will still be significantly over revving that motor. I would caution against making inferences from this rule. You are so far off I would be uncomfortable you applying it based on my comments. Not sure it is even practical. Are you absolutely sure the tach is correct? Hopefully someone with more knowledge than me will chime in. [/QUOTE]
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