Re: 1963 Johnson QDL-24 10HP

[Don]

Thought about this some more on the drive to work….1963 was the last year for the 10hp, so OMC may have been on a cost cutting mission here….
The threaded boss might have been a sign of designs to come in later years for the 18-25hps, which I’m sure shares a common carb body casting with these 10hps…
In any event, even the wizards at OMC couldn’t expect that throttle arm to stay in place on the throttle shaft with just that set screw….Look at the throttle shaft again, I’m thinking you will find a dimple on the shaft where the throttle arm set screw is supposed to park itself into….