Husqvarna SMS 125 2011, Specifications - Operation - Maintenance

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TROUBLESHOOTING
The following list is used for troubleshooting and to find
the necessary remedies.
The engine does not start
- the starting procedures are not correctly followed: fol-
low the instructions given on paragraph “Starting the
engine”
- dirty spark plug: clean
- the spark plug does not spark: adjust the electrodes
gap
The engine has starting troubles
- dirty or worn out spark plug: clean or replace
The engine starts, but it is erratic
- dirty or worn out spark plug: clean or replace
- faulty spark plug electrode gap: adjust;
The spark plug gets easily dirt:
- unfit spark plug: replace
The engine overheats
- the air flow on the radiators is blocked: clean
- insufficient quantity of oil: top up
- Check that the thermostat valve functions correctly.
The engine lacks power
- dirty air filter: clean
- the spark plug electrode gap is too large: adjust;
- insufficient compression: check for the cause
The engine knocks
- excessive carbon deposit on the piston crown, or in the
combustion chamber: clean
- faulty spark plug or wrong heat rating: replace
The alternator fails to charge, or its charge is insufficient
- the cables on the voltage regulator are badly connect-
ed, or in short-circuit: correctly connect, or replace
- faulty alternator coil: replace
- de-magnetised alternator rotor: replace
- faulty voltage regulator: replace
The battery overheats
- faulty voltage regulator: replace
Difficulty in shifting gears
- Transmission/gearbox oil with excessively high viscos-
ity: replace with specified oil
The clutch slips
- insufficient spring load: replace
- worn-out clutch plates: replace
Faulty brakes
- worn-out pads: replace
- Air in system