Indeed the Yamaha F150 is a fine motor. I simply believe overall performance of the 20 hull will suffer with a 480+lb motor back there.
I'm sure others would suggest otherwise. Just my opinion.
Original poster asked if a 90 hp Yammie 4-S would push his 20. I think it would be fine.
Second poster brought up the 150 idea which I tried to inhibit based on the very weight he expressed concern about. Granted in my response I failed to express why I felt that way.
