Regarding Lawn mowers and two cycle chainsaws, weed eaters and etc, I've found if the engine is running
rough or just barely running, you can mix a little of this in with the fuel and run it a while and many times it
will straighten right out and run normal. It mostly works good for a carburetor that's got a little trash in it. It
don't always work but it's worth a try before you tear it down
https://www.berrymanproducts.com/pr...-carburetor-fuel-system-and-injector-cleaner/