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Message: <blockquote data-quote="Pappy" data-source="post: 235112" data-attributes="member: 3278">First off what year is your engine? Later engines (around 1982 or so) of your HP had an exhaust tuner in addition to your carb change. This is worth a little more horsepower. Second. Yes, you will benefit from jacking the engine up on the transom. Go adjustable if you can. There are a couple good threads on here addressing that subject. With your rig you may be able to go up around 2.5" or so from where you are currently at and still run the same prop. That engine likes to turn over 6,000RPM and the additional height may get you there or a little closer. How did you check RPM?</blockquote>