what other mods do you have? pipe, arrestors, jetting do you have the holeshot trigger? how and where is the water being injected into the exhaust? What riding style? more bottom or top end? do you pull a tube or wakeboard? rec or race boat? the msd has tons of flexability but must be tuned to your needs, if not motor damage and poor performance are highly likely. Also the enhancer needs to be tuned on the water where test runs can be made and temp readings can be taken with an infrared thermometer.