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Troubleshooting schedule
Problem Cause
Engine does not start
There is no fuel in the fuel tank
Spark plug defective
Faulty spark plug connections or interchanged cables
Dirt in the carburettor or fuel line
Fuel tank vent blocked
Starter motor does not turn over the engine
Battery flat
Poor contact affecting the battery terminal cable connections, ignition
lock, or starter
Power take off (PTO) activated
Main fuse blown.
Ignition lock faulty
Faulty starter motor
The parking brake is not on
Engine does not run smoothly
Faulty spark plug.
Carburettor incorrectly set
Air filter clogged
Fuel tank vent blocked
Ignition key defective
Dirt in the carburettor or fuel line
Choking or incorrectly adjusted throttle cable
Engine seems to have no power
Air filter clogged
Faulty spark plug.
Dirt in the carburettor or fuel line
Incorrect carburettor adjustment.
Choking or incorrectly adjusted throttle cable
Engine overheats
Engine overloaded
Air intake or cooling flanges blocked
Fan damaged
Too little or no oil in engine
Ignition defective
Faulty spark plug.
Battery does not charge
The battery missing or damaged
Poor contact on the battery terminal cable connectors
Main fuse blown.
Power consumption too high, max 20 A
Machine vibrates
Blades are loose
Engine is loose
One or more blades unbalanced, caused by damage or poor balancing
after sharpening
Uneven mowing
Blades blunt
Cutting unit skew
Long or wet grass
Grass blockage under hood
Different tyre pressures on right and left front wheel
Over-speeding
Engine speed too low
Drive belt slipping
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