Spoke before about flashing my new Yamaha sho 225 to a 330 and said I would let you know what happened.
The 225 would only turn my 25 pitch prop at 5400 rpm so I backed off to a 23 pitch to get it broke in. The boat would run 65mph. Flashed it to a 330 and now it's turning a cupped 26 pitch at 61-6200 rpm at 74 mph. This is on a z20 ranger tournament loaded with around 36 gallons of fuel and my wife with me. I'm sure if I drop some weight I will pick up some top end. Should also pick up some top end when it's not hot and humid. A tad bit sluggish coming out of the hole compared to the 23 pitch but still gets out fast enough.
The 225 would only turn my 25 pitch prop at 5400 rpm so I backed off to a 23 pitch to get it broke in. The boat would run 65mph. Flashed it to a 330 and now it's turning a cupped 26 pitch at 61-6200 rpm at 74 mph. This is on a z20 ranger tournament loaded with around 36 gallons of fuel and my wife with me. I'm sure if I drop some weight I will pick up some top end. Should also pick up some top end when it's not hot and humid. A tad bit sluggish coming out of the hole compared to the 23 pitch but still gets out fast enough.
