I just bought a 99 Ranger R61 with a 99 Mariner 90 hp. It has a 3 blade aluminum 19 pitch prop. It has good compression and everything checked out at the marina. However, I am having a tough time getting it to plane. It takes a long time and I have to have someone get on the front deck to get it to plane out. Would a different prop help? What prop should this boat have? Thanks!!