I was wondering if anyone knows what kind of problems I might run into if I was to put a 21-25HP motor on my 48" Turf Tracer HP. My primary areas of concern are: 1) I assume that the mounting bolt pattern would be different on a bigger motor, but I could drill new hole in the engine deck right? 2) do new motors come with mufflers or would I have to find one that work fit? and 3) would it be a bad idea to put more HP on any exisitng component of the mower. For example - could the hydro pumps handle more HP? I know this wouldn't be cheap to do, but more HP should allow me to be much more productive when mulching thick Bermuda grass. I love the mower - just need more power. In addition, I do have another use for the 17 HP motor on the motor if I were to do this so that somewhat offsets the cost.