Bob, Have a 1997 Nordic Rush I just picked up, 454mpI, boat has a 4 blade prop, 22p, 48-831910 stamped on prop. Boat gets up on plane ok but once up , getting prop wash after up on plane when I throttle up. When we have 6 to 7 people and full tank of gas, If someone moves the front of the boat prop will spin. Back off on throttle and the prop will catch. Had the motor pulled for new mounts and replaced the coupler, did not look like it was spinning. Should I consider lowering the drive a little? Boat has been mostly used on river, I use it in Mohave and powell. Help. Albert