GB
25
PROBLEM
Unit won’t start or starts but will
not run.
Unit starts, but engine has low
power.
Engine hesitates.
No power under load.
Runs erratically.
Smokes excessively.
1. Remove cutter knife (E) from debris shield (F)
(Fig. 17).
2. Place knife in a bench vise. Sharpen knife using a
flat file, being careful to maintain the angle of
cutting edge. File in one direction only.
• STORING A UNIT
Warning: Failure to follow these steps may
cause varnish to form in the carburetor and difficult
starting or permanent damage following storage.
1. Perform all the general maintenance
recommended in the Maintenance Section of
your User Manual.
2. Clean exterior of engine, drive shaft assembly,
debris shield and stringhead.
3. Drain fuel from the fuel tank.
4. After fuel is drained, start engine.
5. Run engine at idle until unit stops. This will purge
the carburetor of fuel.
6. Allow engine to cool (approx. 5 minutes).
7. Using a spark plug wrench, remove the spark
plug.
8. Pour 1 teaspoon of clean 2-cycle oil into the
combustion chamber. Pull starter rope slowly
several times to coat internal components.
Replace spark plug.
9. Store unit in a cool, dry place away from any
source of ignition such as an oil burner, water
heater, etc.
10. Do not transport and store the trimmer with the
blade fitted unless the supplied transport guard is
also fitted.
• REMOVING A UNIT FROM STORAGE
1. Remove spark plug.
2. Pull starter rope briskly to clear excess oil from
combustion chamber.
3. Clean and gap spark plug or install a new spark
plug with proper gap.
4. Prepare unit for operation.
5. Fill fuel tank with proper fuel / oil mixture. See Fuel
and Lubrication Section.
Trouble shooting the engine
PROBABLE CAUSE
Incorrect starting procedures.
Incorrect carburetor mixture
adjustment setting.
Fouled spark plug
Fuel filter plugged.
Incorrect lever position on
choke.
Dirty air filter.
Incorrect carburetor mixture
adjustment setting.
Incorrect carburetor mixture
adjustment setting.
Incorrectly gapped spark plug.
Incorrect carburetor mixture
adjustment setting.
Incorrect fuel mixture.
CORRECTIVE ACTION
Follow instructions in the User
Manual.
Have carburetor adjusted by an
Authorized Service Center.
Clean / gap or replace plug.
Replace fuel filter.
Move to RUN position.
Remove, clean and reinstall filter.
Have carburetor adjusted by an
Authorized Service Center.
Have carburetor adjusted by an
Authorized Service Center.
Clean / gap or replace plug.
Have carburetor adjusted by an
Authorized Service Center.
Use properly mixed fuel (40:1
mixture).
