John Deere tractor mowers are used around the world to cut and maintain sizable lawns. Internal combustion engines drive the mowers, which run on easily available gasoline. Fueling and maintaining a tractor mower is a straightforward operation, as long as you take proper safety precautions.
Gasoline and Octane
John Deere tractor mowers use unleaded gasoline, which is available from any service station. You can use any octane rating, from 87 up to "premium" 92, which burns cooler and helps to prevent engine knocking. Don't use gas/oil or two-cycle gas in a four-cycle mower engine. The oil will clog your spark plug and prevent the engine from starting or running.
Purchase gasoline in a 1- or 2-gallon container, then transport the gas to your John Deere mower for use. Use a clean funnel to fill the mower's tank. Always use fresh gas, as gasoline that has been allowed to sit for several weeks or months can affect your engine's performance. Stagnant gas can build up moisture that leads to deposits in the engine and carburetor, and clogged fuel lines.
Take care in handling gasoline and storage cans. Fuel is flammable and, under certain conditions, explosive. Don't smoke when you are filling the tank or working on the machine. Always clean up spilled gasoline and clean clothing that has been stained with gasoline. Don't store gasoline in a closed space where fuel vapors can build without ventilation.
Inspect your John Deere's fuel filter regularly and replace it at least once a year. The filter collects dirt and debris; a clogged filter can affect engine performance and waste gasoline. Always change the filter outdoors, and check the fuel line for leaks after you do so.