Fuel degrades as it sits in the tank, so pour in some fuel stabilizer (available at home stores), following the dosage directions on the bottle; it will keep gas fresh for about six months. For lighter tools, such as trimmers, it’s better to drain the gas entirely. Pour the excess into a clean pan, then run the engine with the choke on, pressing the primer button until it quits.
Pro Advice: “Don’t leave cans of gasoline sitting around, because the fuel will absorb water, which makes motors run rough. Funnel whatever’s left into your car’s tank, then buy fresh gas come springtime.”
—Craig Murray, owner, LIFFCO Power Equipment, Mineola, New York