50 to 1 Remember, too much oil will reduce the flash point of the fuel and
create detonation, which will melt piston and head.
Steve

"rckchp" wrote in message
...
OT. I'm reactivating a 1997 Evinrude 9.9 hp outboard and I've
misplaced the owner manual, and I don't remember the proper oil mix
ratio. Is it 50 to 1, or 100 to 1? Thanks.