Bob, I am having a similar problem with my 25 Outlaw with 502. I am only getting about 4400 RPM @ 61 mph. I talked to the Baja Factory and prior to delivery they tested the boat at 4800 RPM @ 68mph. Currently the boat is at the shop to find out why my 502 is acting like a 350. I'll let you know if I find something out. The tech rep at the factory I talked to said the ECM is probally not working properly but the motor should definently be turning out more rpm and power. If your motor is good I have been hearing and reading a lot of good things about the hydromotive 4 blade. There was also an article in ***boat a bit ago about a 280 Checkmate. Check the archives in this website, there may have the prop listed.
Outlaw
BOB[/B][/QUOTE]