Engine

If	Check
Engine Will Not Start	Look for flashing indicators on instrument cluster. Brake not pushed down. PTO/RIO switch in on position. Relieve fuel line pressure if run out of fuel. Upper (switch) fuse blown. Improper fuel. Dirty or faulty injectors, see your John Deere dealer Plugged fuel filter. Spark plug wire(s) loose or disconnected. Spark plug(s) not gapped correctly. Discharged Battery
Engine Is Hard to Start	Loose or corroded electrical connections. Stale or dirty fuel. Battery voltage is too low. Improper fuel. Plugged fuel filter. Dirty or faulty injectors, see your John Deere dealer. Spark plug(s) fouled. Check choke position. Faulty spark plug(s). Spark plug(s) not gapped correctly.
Engine Misfires Under Load	Stale or dirty fuel. Improper fuel. Plugged fuel filter. Dirty or faulty injectors, see your John Deere dealer Faulty spark plug(s). Spark plug(s) not gapped correctly.
Engine Runs Unevenly	Fuel line or fuel filter plugged. Stale or dirty fuel. Improper fuel. Loose electrical connections. Air cleaner element plugged. Dirty or faulty injectors, see your John Deere dealer.
Engine Overheats	Engine air intake screens plugged. Radiator fins plugged. Engine oil low. Engine operated too long at slow idle speed. Coolant low. Loose or defective fan/alternator belt.
Engine Loses Power	Engine overheating. Improper fuel. Too much oil in engine. Air Restriction Indicator - Air cleaner element plugged.
Engine Stops When Brake Is Disengaged	Seat switch not engaged. Seat switch disconnected or broken.