9 9 vs 15 hp johnyrude

[clam]

I have been told that the only difference between these 2 engines is the carburetor. I am talking about 70s thru 90s, Does anyone know if this is a true statement and what year motors apply? Tanx

[mercguy]

carb and tuner pipe.......same situation as Merc 9.9/15

[Smokin' Joe]

I have been told that the only difference between these 2 engines is the carburetor. I am talking about 70s thru 90s, Does anyone know if this is a true statement and what year motors apply? Tanx

Best are 1980-83. I have a 1981 15 on a fishing boat that turns 6500.