Anyone else own a Mach 1 Commodore 21' bow rider and can recommend a prop size? Bought it used and it came with SS prop but acceleration is awful. Once it gets up on plane it screams, but I use mostly with my family so WO throttle is rare. Looking to put a prop on that will give better performance cruising. Any one have any suggestions on a good size/pitch combo? Has a mercruiser 5.7 260hp engine and Alpha OD. thanks