I'm not actually a gunsmith, but sometimes imitate one with pretty good success. I buy a lot of old wrecks of rifles and pistols and have fun making them work as intended, sometimes having to create missing parts, from what I scrounge out of my ummmm treasures.
Well I found myself working on an Evinrude 15 HP outboard motor, that is in pretty good shape, but -- has been messed with by someone who didn't quite know what they were doing. (I think they knew just a little bit less than I do about it.)
Anyway, I found that my skills and previous experience came in handy in creating a carburetor linkage that replaces a part that isn't available. It was very similar to a trigger or safety linkage that one might find on various bolt action rifles.
I've still got to finish assembling the motor - carb, flywheel, starter, tiller/throttle handle, and such. BUT-- I think I've nailed it on this carb-choke linkage. These old motors are pretty well made, although designed in weird ways, so as to fit a lot of stuff in a small housing. Been a pretty fun project so far, and a punch to my man-card if I have final success. jd