Re: 1992 120 hp force outboard hp improvement
Outboard engines are NOT like auto engines and the same rules do not necessarily apply!
You can not remove more than .010 safely. HOWEVER: It is possible to mill .060 without having the piston contact the head. The increase in compression while increasing the BMEP of the engine will NOT yeild a significant increase in horsepower, you will probably see NO increase in speed, and very well may damage the engine. The increase in compression MAY require premium fuel; you may increase the likelihood of detonation.
In short, unless you are all-out modifying the engine for balls-to-the-wall race purposes, don't do it!
While I am a Chrysler and Force enthusiast, if you really want to go faster, the answer is to buy a Merc. However, Attached is a stock three cylinder 90 Force doing 55.
