I need help! I'm running a Sunbird 198 Sport Cuddy with an OMC 2.5 (120 hp) and OMC outdrive. This boat is forever coming to plane. When I first leave the dock and throttle down it will run about 3,000 rpm. When it does finally plane, it will run 42-4400 rpm and will really fly across the water. I had a 13.5 X15 prop, then tried a 12.7 X 19 and it did even worse. The 13.5 is the biggest I can put on it and still clear the outdrive. Will a 4 blade Comprop help? What can I do? I don't believe this boat should have to have trim tabs to get it out of the water. I did put the big fin on the outdrive though. I'm lost. Thanks for any help.<br /><br />Mdborn