Another problem that can cause a gas-powered Stihl weed eater to run poorly or refuse to start is an old or dirty spark plug. You'll usually need a socket or spark plug wrench to loosen the spark ...

If they're damaged or clogged with debris, the trimmer likely won't work. person removing spark plug from Stihl trimmer - iScaper1/YouTube If you can't get your gas-powered Stihl weed eater to ...