Maintenance Interval
• The spark arrester should be inspected and cleaned after
every 25 hours of use.
• Replace the screen if it cannot be thoroughly cleaned, or
if it is damaged.
Spark Arrester Maintenance
1. With the engine at ambient (room) temperature, loosen
the knob and remove the air filter cover.
2. Twist the high tension lead boot on the spark plug
back and forth a couple of times to loosen the boot,
then pull the boot off of the spark plug.
3. Loosen the knob and lift off the cylinder cover.
4. Remove and clean the tail, gasket and spark arrester
with a safety solvent and a stiff brush. If any part cannot
be thoroughly cleaned, it must be replaced.
5. Reinstall the spark arrester and tail onto the muffler,
then reinstall and tighten the two socket headscrews.
6. Reinstall the cylinder cover and the air filter cover.
Exhaust Muffler
Maintenance Interval
The muffler should be inspected and cleaned after each
100 hours of use.
Muffler Maintenanc
1. With the engine at ambient (room) temperature,
loosen the knob and remove the air cleaner cover.
e
2. Twist the high tension lead boot on the spark plug
back and forth a couple of times to loosen the boot,
then pull the boot off of the spark plug.
3. Loosen the knob and lift off the cylinder cover.
4. Remove the spark arrester (see spark arrester
maintenance), Clean the muffler with a stiff brush.
IMPORTANT: Don't use solvent for cleaning
inside of muffler, because of the catalytic converter
in muffler.
Be careful not to allow any dirt or debris to fall
into the exhaust port, as this can cause engine damage.
5. Reinstall the spark arrester and tail onto muffler,
then reinstall and tighten the two socket head
screws.
6. Reinstall the cylinder cover and the air filter cover.
Lubrication
Maintenance Interval
The gearcase should be inspect after each 30 hours of
use.
Lubrication
The gearcase should be checked for lubrication after each
10 hours of use. Grease fittings are installed into gearcase.
Use #2 lithiumbase bearing lubricant.
― US - 22 ―
Grease Fitting