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Engine Will Not Start Or Is Hard To Start
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Check diagnostic light.
Motion control levers not in the “neutral lock”
position.
Park brake lever not in the proper position.
Operator not on seat.
Key switch not in proper position.
PTO engaged.
Stale or improper fuel / fuel level
Plugged fuel filter.
Plugged air intake filter.
Blown fuse.
Electrical problem - dead battery.
Fuel system on water or air.
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Engine Runs Rough or Stalls
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Plugged fuel filter.
Plugged air intake system.
Fuel cap vent dirty.
Stale or improper fuel / fuel level.
Dirty or faulty fuel injectors.
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Engine Knocks
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Engine oil level low.
Reduce load. (Slower ground speed.)
Fuel is bad. Fill tank with fresh fuel, correct octane.
Idle speed too slow.
Water in fuel system
Clogged air filter
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Engine Overheats
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Clean grille, radiator screen or radiator cooling fins.
Low oil level.
Do not operate at slow idle. Operate at fast idle.
Plugged air intake filter.
Operating at too fast ground speed for conditions.
Defective thermostat, water temperature indicator or sender.
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Engine Lacks Power
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Reduce load.
Plugged air intake system.
Plugged fuel filter.
Improper type of fuel. Drain tank and fill with correct fuel.
Clean cooling fins to help prevent overheating.
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Engine Uses Too Much Oil
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Find and correct oil leaks.
Incorrect engine oil.
Plugged oil filter.
Plugged air intake filter.
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Low Oil Pressure
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Engine oil level low.
Plugged oil filter.
Improper type of oil.
Oil leaks.
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Engine Emits White Smoke
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Improper type of fuel.
Low engine temperature.
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Engine Emits Black Or Gray Exhaust Smoke
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Improper type of fuel.
Plugged air intake system.
Operating at too fast ground speed for conditions.
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High Fuel Consumption
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Improper type of fuel.
Plugged air intake system.
Operating at too fast ground speed for conditions.
Restricted air intake system.
Plugged crankcase vent tube or baffle.
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