Remember you need to go up one to two prop sizes minimum , to make the current prop work try moving it back towards the stator veins ( no Washer ) no stubby tail cone, an aggressive intake grate , all will help. Make sure when you fit the pump to the wear ring it's a smooth transition (drum sander on a drill), silicone the wear ring, pump seal and pump shoe together and smooth out the excess with an ice cube or soapy finger , This is the most critical area of the ski for hook up. Your motor is going to feel 100-200cc larger and so the best is to prop for it along with the other tricks, just keep it on the down low. BRAP