Dating outboard motors
When they designed this series of motors, they designed it as a 15 hp and then detuned it with a different carburetor for the 9.
There is nothing inside these silencers as that's all they do is silence there is no dust on the water.
The word was that the imported Japanese engines of the same rating were outperforming the US engines, as they were rated differently.
My son and I went to Lake Pueblo in Colorado and the engine instantly started, warmed up nicely, and we spent the next 4 hours cruising all up and down the lake. You and your family should be very proud of this family business. Albert, I bought a 1957 35hp Johnson Javelin from you a few weeks ago, and just recently got it matched up and mounted to my antique 1956 Larson Falls Flyer boat that my Dad bought in 1960.