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25hp Johnson Propeller help
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<blockquote data-quote="turbotodd" data-source="post: 477790" data-attributes="member: 7376"><p>assuming your 25hp johnson is a twin cylinder, the max rpm is, off of memory, 5500. If you are already at 5800, your are under-propped and increasing pitch by one inch from what you currently have "should" get you in the ballpark, propbably pick up a couple mph as well. If yours is a 3 cylinder, max is 5800 as I recall and if you're at 5800 now, I'd say that's just nearly perfect. Ideally you want to be at the upper limit of maximum rpm for best all around performance.</p></blockquote><p></p>
[QUOTE="turbotodd, post: 477790, member: 7376"] assuming your 25hp johnson is a twin cylinder, the max rpm is, off of memory, 5500. If you are already at 5800, your are under-propped and increasing pitch by one inch from what you currently have "should" get you in the ballpark, propbably pick up a couple mph as well. If yours is a 3 cylinder, max is 5800 as I recall and if you're at 5800 now, I'd say that's just nearly perfect. Ideally you want to be at the upper limit of maximum rpm for best all around performance. [/QUOTE]
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