05 285xl Pro
150 Vmax carb
6 inch Slidemaster jackplate
Yamaha 25m prop
2 3/4 below pad
67.1 mph on GPS full of gas, ready to fish


Bought the boat back in early summer had a 23M prop on it would run 63-64 but would go 61-6200 rpm. Bought a 25M to lower the rpms, stuck it on and it will run good up to 65-66 just as smooth as can be at around 5900-6000, bump the trim once more it goes 66 and starts dancing a little not to but not to bad, bump it once more and it will go 67 and then it starts dancing to the point you have to back out of it a bit to settle it down. When it runs 67 rpms are back to 61-6200, and it actually drives and feels like it is over trimmed due to the dancing, and you can hear the motor get louder also, but it still picks up speed. I believe it would pick up some more if you didnt have to feather the throttle or bump the trim back down to settle it......My question is which route do I need to go to correct this or improve this i?....Jackplate higher or lower, try more prop?....I'm new to this so take it easy on me, any any comments will be apprecitated...Thanks.