Engine

If	Check
Engine Will Not Start Or Is Hard To Start	Transmission gear shift lever not in neutral position. PTO engaged. Engine throttle lever not pushed forward. Fuel shut-off valve CLOSED (OFF). Stale fuel / improper fuel / fuel level. Wrong engine oil viscosity. Cold start system not being used, or malfunctioning. Plugged fuel filter. Plugged air intake filter. Dirty or faulty fuel injectors. Blown fuse. Failed fuel solenoid. Other electrical problem.
Engine Runs Rough Or Stalls	Fuel shut-off valve partially closed. Plugged fuel filter. Plugged air intake system. Fuel cap vent dirty. Faulty seat switch. Stale or improper fuel / fuel level. Dirty or faulty fuel injectors. Low coolant temperature. See your John Deere Dealer. Fuel pump not functioning properly. See your John Deere Dealer.
Engine Overheats	Dirty grille, radiator screen, or radiator cooling fins. Plugged air intake filter. Low coolant level. Cooling system needs flushing. Defective radiator cap. Defective thermostat. Defective water temperature indicator or sender. Low oil level. Loose or defective alternator belt. Engine speed too low for load. Do not operate at low idle. Operating at too fast ground speed for conditions.
Engine Knocks	Engine oil level low. Injection pump out of time. See your John Deere Dealer. Low coolant temperature. See your John Deere Dealer. Engine overheating. Idle speed too low.
Engine Lacks Power	Exhaust filter restriction. See your John Deere Dealer. Improper type of fuel. Plugged air intake system. Plugged fuel filter. Engine Overheating. Operating at too fast ground speed for conditions. Engine oil viscosity too high. Low coolant temperature. See your John Deere Dealer. Improper valve clearance. See your John Deere Dealer. Dirty or faulty fuel injectors. See your John Deere Dealer. Injection pump out of time. See your John Deere Dealer. Implement improperly adjusted, causing drag on machine. See implement operator’s manual. Rate-of-drop valve closed, causing hydraulic load on engine.
Low Oil Pressure	Engine oil level low. Plugged oil filter. Improper type of oil. Oil leaks.
Engine Uses Too Much Oil	Find and correct oil leaks. Incorrect engine oil. Plugged air intake filter.
Engine Emits White Smoke	Improper type of fuel. Low engine temperature. Defective thermostat. See your John Deere Dealer. Engine out of time. See your John Deere Dealer.
Engine Emits Black or Gray Exhaust Smoke	Improper type of fuel. Plugged air intake system. Operating at too fast ground speed for conditions. Dirty or faulty fuel injectors. See your John Deere Dealer. Engine out of time. See your John Deere Dealer.
High Fuel Consumption	Improper type of fuel. Plugged air intake system. Operating at too fast ground speed for conditions. Improper valve clearance. See your John Deere Dealer. Dirty or faulty fuel injectors. See your John Deere Dealer. Engine out of time. See your John Deere Dealer. Implement improperly adjusted, causing drag on machine. See implement operator’s manual. Low engine temperature. Restricted air intake system. Plugged crankcase vent tube or baffle. Brakes dragging.