Now, I have been a motorcycle tech for many decades, and I get that, that industry is a lil different than is automotive. And nearly every problem on a bike can be traced to a compression issue. So when a bike comes in with certain symptoms, Ima gonna do a compression test, or, you can take it down the road. I fix stuff. I don't put bandaids on gushing arteries.
Same when I do marine work. the last thing a guy wants is to be stuck out on the water ripping on the rope; lemmee fix it right or take it on down the road.
Same with chainsaws; some guys make a living with those.
Now: Pushmowers, that's a different world. I quit working on those many decades ago. We sent those to a retired old guy, who was pretty good at it, and his shoprate was a fraction of ours. Now, I'm the retired old guy in my community, and guess what ............ Hyup, I do a lotta compression tests, which usually ends up with me owning the junker, and them buying a new one. I got 23 pushmowers, three riders, a snowblower, a tiller, and a whole mess of chainsaws/and string trimmers.. I'm thinking of going into the rental business, lol.