looking to replace my motor on 1974 starcraft16 foot ss. Due to local hp limits on a lot of water here in Pa. I'm looking at a 20 hp Yamaha. I know it may not get the boat up on plane but was going to change out the prop with a different pitch and go with stainless. I was hoping for some comments,suggestions on my thought being there are a lot of folks here far more knowledgeable on boating than I am. Thanks