Just an idea
For you preppers. My friend is kind of a hoarder, but he does something extremely cool. He pilfers junk yards and gets all types of lawnmower, weedwacker, etc engines and fixes them. I've seen him fix 2 kerosene heaters for under 25 dollars worth of parts, and they work like new. Great learning experience, and you can do a lot with old generators and alternators.
Arbitrary enforcement of the law is the mark of tyranny. Citizens will always fight against it.