What is the mechanical difference between a Force 90HP and a 120HP. I have a 1997 90 HP and want to bump it up to 120 HP without buying a newly used motor. Does anyone have any ideas?
As far as I know the 90hp is a three cylinder engine and the 120 is a 4 cylinder engine. So unless you have some method of adding a 4th cylinder onto your block, getting to 120hp output from your 3 banger will be far more expensive than purchasing a solid 120.
