Sounds amazing. How on earth did he go from shoeing horses to learning about the internal combustion engine? Seems quite the leap that not everyone would be capable of.
Joke aside, it was not shoeing horses but also working on the carts, etc. Probably bikes too. So at least he reused some mechanical skills, and probably tools, he already had. Only the engine was really new.
And many people living in small villages back then had basic knowledge in many disciplines, including electricity. When you had a farm for instance, you needed to be able to repair yourself anything.
We're fixing up a 1987 Jeep Wrangler for our son. I could strip it down to the frame with 3 or 4 tools. It's kind of amazing how simple cars were, and that was in the late 80's.
Alec of Technology Connections just posted a video on this:
But it was easy to work on. My dad (not a mechanic) usually had a strong hunch about what the problem was. Lights went dim while you were driving and five minutes later it sputtered out? Alternator is dead. Flip through the manual to find a diagram of where all the bolts are, take it off, run to Auto Zone, get another one, bolt it on. By the end it was usually dark and I was finishing the job with a shop light hung under the hood.
I drove a series of beaters from the 80s and 90s and did all my own repairs until my mid 20s. Alternators, water pumps, break pads, break lines, ignition solenoids. All of it is just parts that you unbolt and bolt a new one on. When I got my first modern car (a 2008!) one look under the hood made me realize I had joined the yuppie class and would not be changing my own spark plugs anymore.