Re: My "115" Evinrude is really an 88hp
Regarding the flat back 115 - prior to 1984, they were flat backs. After 1984, any 115s were bubble backs, as they re-rated the motors at the propshaft, with the old 140 bubble becoming the 115/110, the old 115 becoming the 100, etc. The 85/90 stayed the same - I guess because it was a "strong" 90 before the switch, and became an "average" 90 afterwards, falling within the 10% variance allowed...