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trainfan1 wrote:
wrote:

O.K.: Urban myth or not?

I've heard over and over again that everything is the same on a 7.5
h.p. Johnson as on the 15 horse, except the carb. I also heard it's
not even the carb, it's just the jets.

I have a 1980-ish 7.5 seahorse that just does not have the guts to pop
my inflatable up on plane with two people and a full tank aboard. I
added those wings, which do help, but still just need a little more.

You've heard wrong. That engine is a 6/7.5/8 hp. The conversion you
are wishing for is the 9.9 - to - 15 hp, those two are nearly identical
except for the carb and, on earlier models, the exhaust tuner.

Rob

That is the same thing that I heard (9.9 and 15 hp nearly identical).

Bill