Cobra S40C - Troubleshooting

16
13. TROUBLESHOOTING
Problem
Possible causes
Remedial action
Engine does not start
Throttle choke is not in the correct
position
Move the throttle choke to correct
position.
Fuel tank is empty.
Fill tank with fuel: refer to ENGINE
OWNERS MANUAL.
Air cleaner element is dirty.
Clean air cleaner element: refer to
ENGINE OWNERS MANUAL.
Spark plug loose.
Tighten spark plug.
Spark plug wire loose or
disconnected from plug.
Install spark plug wire on spark
plug.
Spark plug gap is incorrect.
Set correct gap between
electrodes.
Spark plug is defective.
Install new, correctly gapped plug:
refer to ENGINE OWNERS
MANUAL.
Carburetor is flooded with fuel.
Remove air cleaner element and
pull starter rope continuously until
carburetor clears itself and install
air cleaner element.
Faulty ignition module.
Contact the service agent.
Motor speed drops off
Depth of cut too great
Set to smaller depth of cut
Grass too high
Mow the lawn before scarifying
Ejector channel blocked
Pull out spark plug connector,
remove blockage.
Air filter clogged
Clean air filter: refer to ENGINE
OWNERS MANUAL.
Poor scarification results.
Depth of cut too small
Set to great depth of cut.
Worn cutting blades
Having cutting blades replaced in
a specialist workship
Grass catcher never fills
Grass catcher is full/clogged
Stop the scarifier. Unload grass
catcher or clean it
Ejector channel blocked
Pull out spark plug connector,
clean ejection channel
Unusual noises
Bolts, nuts or other mounting
parts slack.
Tighten parts.
Vibration
Cutting assembly is loose.
Tighten blade cartridge.
Cutting assembly is unbalanced.
Balance blade unit.