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Poor Engine Performance
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Fuel:
- Dirt in fuel system or fuel is old. Replace fuel with
fresh, stabilized fuel. Obtain fuel from another supplier before suspecting
machine problems. Suppliers blend fuels differently, and changing
suppliers will generally solve any performance problems.
- Fuel blended with alcohol or ether may contribute to performance
problems by causing gum and varnish deposits, especially if fuel is
stored for several weeks or more. Obtain fresh fuel.
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Engine Will Not Start or Is Hard to Start
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- Park brake lever not in the proper position.
- Check that motion control levers are in neutral and roller
bearing adjustment is correct.
- PTO engaged.
- Fuel shutoff valve in off position.
- Stale or improper fuel/fuel level.
- Plugged fuel filter.
- Plugged air intake filter.
- Spark plug wires loose or disconnected.
- Spark plugs not gapped correctly.
- Blown fuse.
- Electrical problem - dead battery.
- Choke adjusted incorrectly. See your John Deere dealer.
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Engine Will Not Slow Idle
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- Carburetion problems. See your John Deere dealer.
- Bent or kinked throttle cable.
- Bent governor control.
- Incorrect governor idle control.
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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.
- Spark plugs not gapped correctly.
- Replace spark plugs.
- Choke adjusted incorrectly. See your John Deere dealer.
- Check carbon canister and fuel lines.
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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.
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Engine Overheats
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- Clean cooling fins.
- Low oil level.
- Do not operate at slow idle. Operate at fast idle.
- Cooling air intake screen is dirty.
- Plugged carburetor air intake filter.
- Plugged air intake filter.
- Operating at ground speed too fast for conditions.
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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.
- Replace spark plugs.
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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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Engine Backfires Through Muffler
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- Throttle lever should be at 1/2 fast position for 30 seconds
before turning off machine.
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High Fuel Consumption
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- Improper type of fuel.
- Plugged air intake system.
- Operating at ground speed too fast for conditions.
- Improper valve clearance. See your John Deere dealer.
- Restricted air intake system.
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