I have a 2002 Yamaha 225 OX66 that has a problem with the transition from 4 cylinders to 6 cylinders at about 1700 to 2000 RPM's. When Im am running at these RPM's the motor misses. I brought the motor to local service technicians and they said that it was normal and the motor was fine. I recently was in another boat with twin engines exactly like mine and I could not tell there was any transition with those motors.<br />My warranty is about over and I would like if someone could tell me what the problem might be.