Got a Lund Tyee Grans Sport, 1850'-- 115hp Merc, 17 pitch. ring hook up, No Problem.I meant a few posts below your on the main 'boats' page. Thanks for the info, I'm not getting the performance I'd hoped for out of my Mercury 115, only about 34 mph on a 20' lund Alaskan (flat bottom on the rear, v in the front, 20" transom) and I was looking for comparison. My boat only weighs 800# dry weight, so it should run like a rocket, but it doesn't. Do you know what pitch you're running? Mine's a 21", Shakedown's right about the power, you shouldn't have any problems with the hp from the motor, but you might have to drop down a size or so in pitch to get the low end you're looking for.