Fault Possible cause Troubleshooting
The machine does not start. Correct starting procedure not
followed.
Follow the instructions for starting.
Sooted or damp spark plug Clean the spark plug or replace it
with a new one.
Incorrect carburetor setting Contact an authorized customer
service outlet or send the machine
to ISC-GmbH.
The machine starts but does not
develop its full output.
Incorrect choke lever setting Set choke lever to “ ”
Soiled air filter Clean the air filter
Incorrect carburetor setting Contact an authorized customer
service outlet or send the machine
to ISC-GmbH.
The engine does not run smoothly Incorrect electrode gap on the
spark plug
Clean the spark plug and adjust
the electrode gap or fit a new spark
plug.
Incorrect carburetor setting Contact an authorized customer
service outlet or send the machine
to ISC-GmbH.
Engine smokes excessively Incorrect fuel mix Use the correct fuel mix (see fuel
mixing table)
Incorrect carburetor setting Contact an authorized customer
service outlet or send the machine
to ISC-GmbH.
9. Troubleshooting
GB
22
