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10. Troubleshooting
Problem
Cause
Correction
The engine won’t start or
only runs at low speed.
Incorrect starting procedure.
Read the instruction ma-
nual.
Dirt in the carburettor.
Allow a qualified technician
to clean the carburettor.
Faulty spark plug.
Clean or change the spark
plug.
Clogged fuel filter.
Change the fuel filter (inside
the fuel tank).
The engine starts but with
loss of power.
Wrong choke setting.
Set the choke to “OPEN”.
Dirty air filter.
Clean or change the air
filter.
Dirt in the carburettor.
Allow a qualified technician
to clean the carburettor.
The engine doesn’t respond
to the throttle.
The engine is not warm
enough.
Allow the engine to idle for
a minute.
Loss of power under load.
Incorrect spark plug gap.
Clean and check the gap or
change the spark plug.
The engine runs irregularly.
Dirt in the carburettor.
Allow a qualified technician
to clean the carburettor.
The engine smokes a lot.
Incorrect fuel mixture.
Use petrol and 2-stroke oil
in the ratio 40:1 (2.5%).
Note!
The grass trimmer conforms to current safety requirements. Repairs to the grass trimmer
should always be carried out using original spare parts and by a qualified technician, failure to
do so may result in injury.
We apologise for any text or photo errors and any changes of technical data.
If you have any questions concerning technical problems please contact our
Customer Service Department (see address on reverse).
Summary of Contents for HY3315A1
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