My neighbor runs a loud gas trash pump on his dock all day when he’s out.

This is moronic in about 37 different ways, but this sort of problem is what a .22 Long Rifle round is made to solve. If you’re a good shot that is.

Hit that pump with a couple of those, issue resolved. And .22 LR has low penetrating power from ricochet so there is very little danger of the round going through walls of nearby houses easily. But it will still fuck up the pump.