1989 20 sport or fish

[nipper]

There are better minds than mine on here, and wtf, I run a sterndrive 4.3 litre mercruiser which produces 190 h.p. at the prop, but I would think either the Black Max or the Ocean Pro would be fine, IF your transom is in good shape. Go ahead, drill a couple small holes. Wet, mushy stuff = not good for any re-power, whatever the size. Dry shavings with a fresh lumberyard smell, you are good to go with the 2 stroke outboard of your choice up to 225 h.p., and 4 stroke up to 175.