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what should a new 15hp 4 stroke do on a 1436 jon ?
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<blockquote data-quote="Rat" data-source="post: 343808" data-attributes="member: 1914"><p>My 12 footer with a 9.9 4 stroke would run 26 mph all day long with me and gear. With an extra person and gear she would run 20 MPH. </p><p>The RatKraft, 14 footer decked out, with a 20 HP will run 24 MPH and 20 MPH with an extra person. </p><p></p><p>You could have several problems:</p><p>1) As stated above, incorrect pitch will have a huge effect; heavy boat go heavy on pitch.</p><p>2) Make sure you are hitting the RPMs for the motor, again this is pitch</p><p>3) Make sure the motor isn't too far below the chine, the ventilation plate should be even or just above the bottom of the boat for best performance. </p><p>4) Do you have a Dol-fin (or similar) on the motor? If so, it should be out of the water when on plane. </p><p></p><p>I don't know what you should be getting but you should see a better increase than 4-5 MPH from a 9.9 to a 15 HP; unless the 9.9 was some kinda wicked good motor.</p></blockquote><p></p>
[QUOTE="Rat, post: 343808, member: 1914"] My 12 footer with a 9.9 4 stroke would run 26 mph all day long with me and gear. With an extra person and gear she would run 20 MPH. The RatKraft, 14 footer decked out, with a 20 HP will run 24 MPH and 20 MPH with an extra person. You could have several problems: 1) As stated above, incorrect pitch will have a huge effect; heavy boat go heavy on pitch. 2) Make sure you are hitting the RPMs for the motor, again this is pitch 3) Make sure the motor isn't too far below the chine, the ventilation plate should be even or just above the bottom of the boat for best performance. 4) Do you have a Dol-fin (or similar) on the motor? If so, it should be out of the water when on plane. I don't know what you should be getting but you should see a better increase than 4-5 MPH from a 9.9 to a 15 HP; unless the 9.9 was some kinda wicked good motor. [/QUOTE]
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what should a new 15hp 4 stroke do on a 1436 jon ?
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