IF
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CHECK
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ENGINE WILL NOT CRANK OR START
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Wrong engine oil viscosity.
Stale fuel / improper fuel / low fuel level.
Fuel is dirty / replace fuel filter.
DIESEL MODELS: Open fuel shut-off valve.
PTO indicator light lit-disengage hydraulic PTO lever.
Defective fuse.
Air cleaner filter element(s) plugged.
Put gear shift lever in NEUTRAL position.
GAS MODELS: Spark plug wire(s) loose or disconnected.
GAS MODELS: Check spark plug gap.
Battery low - charge battery.
Battery cables loose or corroded-clean and tighten battery cables.
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GAS MODELS: Spark plug not gapped correctly.
GAS MODELS: Faulty spark plug - replace spark plug.
Stale or dirty fuel.
Plugged fuel filter-replace fuel filter.
Check electrical connections.
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GAS MODELS: Clean/adjust carburetor. (See your technical manual or your John Deere dealer).
Stale or dirty fuel.
GAS MODELS: Check/replace failing spark plug.
GAS MODELS: Check spark plug gap.
Air cleaner filter element(s) plugged.
Check/clean electrical connections.
Check for air lock in fuel line. Disconnect fuel line from fuel filter. Fuel should flow.
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Air cleaner element plugged/ replace filter element.
Clean radiator air intake screen, fan shroud and cooling fins.
Clean oil cooler coils. (Optional)
Check engine oil level - add oil.
Low coolant level.
Cooling system needs flushing.
Defective radiator cap.
Defective thermostat.
Loose or defective alternator belt.
Do not operate at SLOW idle, operate at FAST idle.
Operating at too fast ground speed for conditions.
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ENGINE WILL NOT SLOW IDLE
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GAS MODELS: Clean/adjust carburetor. (See your technical manual or your John Deere distributor.)
GAS MODELS: Spark plug not gapped correctly.
GAS MODELS: Faulty spark plug - replace spark plug.
Improper idle speed adjustment.
Stale or dirty fuel.
Plugged fuel line - clean fuel line.
Valves not seating correctly - adjust valves. (See your technical manual or your John Deere distributor.)
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Gas Models: Faulty spark plug - replace spark plug.
Intake valve sticking - adjust valves. (See your technical manual or your John Deere distributor.)
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Replace fuel filter.
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Dirty or faulty fuel injectors.
Plugged fuel line - clean fuel line.
DIESEL MODELS: Fuel shut-off valve partially closed.
Stale or dirty fuel.
Replace fuel filter.
Air cleaner filter element(s) plugged.
Check/clean electrical connections.
GAS MODELS: Faulty spark plug - replace spark plug.
GAS MODELS: Clean/adjust carburetor. (See your technical manual or your John Deere dealer.)
Faulty seat switch.
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Improper fuel.
Too much oil in engine - drain to correct level.
Air cleaner filter element(s) plugged.
Engine overload-reduce load.
Engine overheating-Clean radiator screen, fan shroud, cooling fins and oil cooler coils (optional).
GAS MODELS: Faulty spark plug - replace spark plug.
Replace fuel filter.
Engine overheating. Operating at too fast ground speed for conditions.
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.
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Stale or low octane fuel.
Engine oil level low.
Engine overload - reduce load.
Improper idle speed adjustment.
Injection pump out of time. See your John Deere Dealer.
Low coolant temperature. See your John Deere Dealer.
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Engine oil level low.
Plugged oil filter.
Improper type of oil.
Oil leaks.
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Improper type fuel.
Low engine temperature.
Defective thermostat. See your John Deere Dealer.
Engine out of time. See your John Deere Dealer.
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ENGINE EMITS BLACK OR GRAY EXHAUST SMOKE.
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Improper type fuel.
Plugged air intake system.
Operating at too fast ground speed for conditions.
Dirty or faulty fuel injectors. See your John Deere Dealer.
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