9.9hp to 15hp johnson

[Brandon_stell03]

So iv read many forums and nobody has a clear answer. What all do i need to convert my 1990 johnson 9.9 to a 15? Carb and exhaust or just carb? I found a 15 hp carb off of a 1975 15hp. Will that work they look identical.

 

[flyingscott]

Just the carb. The later 9.9s had everything the 15 had except the carb.