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<blockquote data-quote="PATRIOT2" data-source="post: 283645" data-attributes="member: 6098"><p>I'm not a guru but without a tach you are shooting in the dark. I'm running a 25 year old 15HP 2-stroke currently and just fitted my tach last week. I have 2 props for the motor, the 9.8P and the 8.4P listed in my owners manual. I can only get the 9.8P up to 4000 rpms. I have yet to get a reading on my 8.4P but will post as soon as I do. For my own comparison, I traced the outline of my blades. To make matters even worse, the 9.8P would not get on plane at all at a 7700 foot altitude, last month, even after a carb adjust. :?</p></blockquote><p></p>
[QUOTE="PATRIOT2, post: 283645, member: 6098"] I'm not a guru but without a tach you are shooting in the dark. I'm running a 25 year old 15HP 2-stroke currently and just fitted my tach last week. I have 2 props for the motor, the 9.8P and the 8.4P listed in my owners manual. I can only get the 9.8P up to 4000 rpms. I have yet to get a reading on my 8.4P but will post as soon as I do. For my own comparison, I traced the outline of my blades. To make matters even worse, the 9.8P would not get on plane at all at a 7700 foot altitude, last month, even after a carb adjust. :? [/QUOTE]
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