I have a 25' tritoon with a 2007 150 4 stroke yamaha. I am new to boating and need some help. What should wot rpm run? it has a 15 pitch prop on it now, has a small flat spot on one of the blades. I can get about 5300-5400 at wot with about a speed of 20 mph. Does this seem right? most of what I read said it should be closer to 5900-6000 rpm. It does have a stainless prop on it can it be repaired?