Read it again. It bans the SALE not use. And yes, there will be huge up tick on small engine repair needs.
Eventually CA will have to stop folks from going to AZ or NV or OR to buy the “sale prohibited” items.
They will have to go full Gestapo—searching every truck as it crossed the border from those states.
There will also be a black market in the ghettos selling these goods.
Gas lawnmower dealers will be treated like drug dealers.