fuel usage difference force to 4 stroke

[mhanewich]

I would like to know what the fuel usage difference would be if I went from a 90 hp force to a 115 4 stroke? I have read manufacturers claim "up to 80% better fuel economy". Any ideas?

 

[JB]

Re: fuel usage difference force to 4 stroke

I would expect the 115 to use about half as much fuel.

 

[rodbolt]

Re: fuel usage difference force to 4 stroke

at cruising speeds I am with JB. the force engines were decent just not very efficient. at or near WOT the gap will narrow some but the 115 should still be in the lead