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EC7500.34
High and Low Speed Needle
The high and low speed needle is fixed
and cannot be adjusted.
Spark Plug Maintenance
If the engine becomes hard to start or
if idle speed is unstable, inspect the
spark plug according to the following
procedures.
1. Remove the spark plug. Refer to
the procedures on page 13, If the
Engine Does Not Start…
2. Clean the electrode with a wire
brush. If necessary, adjust the
electrode gap. The gap should be
0.6mm. See Figure 24.
Cleaning Cylinder Fins
WARNING!
Before cleaning cylinder fins, make
sure the engine is cold.
Dust and debris may accumulate
between the cylinder fins and can lead
to engine overheating. In order to
maintain efficient service, cylinder fins
should be cleaned once every month.
Checking the Drive Belt
The transmission belt tends to loosen
and wear after a period of operation
and should be checked and adjusted
regularly according the following
procedures. If the belt is worn, torn,
cracked, scratched or otherwise
damaged, replace it with a new one
immediately.
Adjusting Belt Tension
(Figure 25)
1. Loosen the two bolts in the belt
guard by one turn.
2. Turn the tension screw so the
washer aligns with the mark on the
clutch cover.
3. Tighten the two bolts in the belt
guard.
Figure 24
0.6mm
EC7500.34A
Figure 25
Clutch
Cover
Bolt
Mark
Belt Guard
Washer
Tension
Screw