IF
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CHECK
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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
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Brake pedal not depressed.
Mower Engagement (PTO) Lever is in ENGAGED position.
Shift lever not in N (neutral) position.
Fuel shut-off valve in closed position.
Spark plug wire is loose or disconnected.
Improper fuel.
Plugged fuel filter.
Electrical problem - See Electrical Troubleshooting Section
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Engine Is Hard To Start
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Carburetor is not adjusted properly or dirty.
Plugged fuel filter.
Choke adjusted incorrectly.
Faulty spark plug.
Stale or improper fuel.
Loose or corroded electrical connections.
Engine oil viscosity.
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Engine Runs Unevenly
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Air intake screen plugged.
Loose electrical connections.
Choke or throttle cable sticking.
Fuel filter plugged.
Stale or dirty fuel.
Improper fuel.
Air cleaner element plugged.
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Engine Misses Under Load
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Faulty spark plug.
Stale or dirty fuel.
Plugged fuel filter.
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Engine Vapor Locks
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Fuel tank vent plugged.
Dirt in fuel filter.
Cooling fins plugged.
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Engine Overheats
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Engine air intake screen plugged.
Engine oil low or too high.
Engine operated too long at a slow idle speed.
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Engine Will Not Idle
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Spark plug not gapped correctly.
Faulty spark plug.
Operator raising off the seat.
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Engine Knocks
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Stale or low octane fuel.
Engine overloaded.
Low engine speed.
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Engine Stops Or Misses When Operating On Hillsides
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Fuel tank less than half full of fuel.
Operator raising off of the seat.
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Engine Backfires
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Faulty spark plug.
Operator raising off of the seat.
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Engine Loses Power
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Engine overheating.
Too much oil in engine.
Dirty air cleaner.
Faulty spark plug.
Travel speed is too fast for conditions.
Improper fuel.
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Engine Stops When shift lever is moved to the R (REVERSE) position and Attachment Is Engaged
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Normal condition. (See Using Reverse Implement Option in the OPERATING section.)
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