b) Clean the spark plug with a steel brush. If the insu lator is
damaged, replace the spark plug instead.
c) Measure the spark plug clearance with a feeler. The clearance
should be 0.7~0.8 mm (Fig.29). If adjust ment is necessary, bend the
side electrode carefully.
d)Check if the spark plug gasket is in good conditions, or replace
with a new one. Screw on the spark plug to the bottom first by
hand and then tighten it up by a spark plug wrench. If a new spark
plug is used, twist 1/2 more turns after impacting the gasket; if
reinstall the original one, just twist 1/8~1/4 more turns.
CAUTION
• The spark plug must be tightened securly, or it may
become very hot to damage the engine.
• Only use recommended spark plug or the equivalent.
Incorrect heat range of the spark plug may damage the
engine.
5. SPARK ELIMINATOR (option)
The spark eliminator should be serviced at least once every 100 hour's operation so as to keep it in a
sound condition.
WARNING
The muffler is very hot during running
the engine and even a long time after
stop ping. Never touch it, or you may get burns.
Service after the engine cools down.
a) Unscrew two nuts M4, and remove the exhaust
elbow from the engine body (Fig. 30).
b) Turn off five screws M5 from the muffler guard
and take out the latter.
c) Turn off screw M4 from the spark eliminator and
separate it from the muffler.
d) Clear away carbon deposit from the spark
eliminator mesh with a brush.
e) Reinstall the spark eliminator in reverse or der of
removal.
CAUTION
• Be careful not to damage the mesh of the spark
eliminator.
• Never use a damaged spark eliminator.
6. ADJUSTMENT OF CARBURETOR IDLING
a) Start and preheat the engine until arriving at its normal working
temperature (Fig. 31).
b)Obtain standard idling by adjusting the throttle fixing screw
under the engine runs at a low speed.
Standard idling:1700±150rpm.
TRANSPORT, STORAGE AND REMOVAL FROM STORAGE
I. TRANSPORT
Transport with the fuel switch turned off. Transport or store the engine when it is cool so as to avoid
getting burns or fire.
CAUTION
Do not incline the engine so as to avoid spilling fuel. Spilled fuel or fuel vapor may ignite
to cause fire.
Muffler
guard
Muffler
Mesh
0.7 - 0.8 mm
fig. 29
Screw M5
Exhaust
elbow
Screw M4
Screw M4
Spark
eliminator
fig. 30
Throttle fixing screw
fig. 31
EN
35