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bfindley

15" 260 merc on river rocket

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I have a 15" 260 mounted on transom set at 1 1/4" above pad, I can't get the bow to raise enough to stop the porpoising, I have a merc 14 1/2" x 30" cleaver on a sport master. Do you guys think the engine is too high or maybe a little cup added to the prop? Thanks, Bob <_<


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How much trim you running? When I had my Euro/280/sport-master running Merc cleavers I liked 1 inch up and ran the trim from even to slightly up. Describe your porpoising more.

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Thanks for your reply Larry, this weekend we are going to lower the motor, distribute weight differently, and test three different props... and then test...test...test! The porpoising was at 55 mph, and I think it's because prop wasn't hooking up properly, due to set-up. Again, thanks Larry. :)


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