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Boat House
Small Motor Tachometer
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<blockquote data-quote="ktoelke54" data-source="post: 484406" data-attributes="member: 21618"><p>If you have an accurate speed, you can use an average slip (5% for example) and come very close to the rpm’s. I realize this is not the preferred method. But who’s to say that a cheapo Tach is not off a bit. </p><p></p><p>I’m familiar with that motor. If your breaking 20 mph with the stock 10 prop, your definitely in the ballpark rpm wise. I dropped from a 10 to a nine pitch because my boat with a heavy load was only doing about 18.5 and was lugging. The nine brought the rpms up where they should be and topped out at 19. It was a lot quicker out of the hole. </p><p></p><p></p><p>Sent from my iPad using Tapatalk</p></blockquote><p></p>
[QUOTE="ktoelke54, post: 484406, member: 21618"] If you have an accurate speed, you can use an average slip (5% for example) and come very close to the rpm’s. I realize this is not the preferred method. But who’s to say that a cheapo Tach is not off a bit. I’m familiar with that motor. If your breaking 20 mph with the stock 10 prop, your definitely in the ballpark rpm wise. I dropped from a 10 to a nine pitch because my boat with a heavy load was only doing about 18.5 and was lugging. The nine brought the rpms up where they should be and topped out at 19. It was a lot quicker out of the hole. Sent from my iPad using Tapatalk [/QUOTE]
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