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1SO
Fig. 6. 12
Spark plug cleaning
CD
Spark plug
Fig. 6. 13
Spark plug measuring 10. 7-0. 8 mm/
Fig. 6. 14
CD
Fuel cock lever
6.
INSPECTION AND ADJUSTMENT
4.
Spark Plugs
The engine condition may be determined by
the condition of the spark plugs.
plugs are contaminated or broken, or the elec
trodes are worn,
efficiently, and the best engine operation cannot
be obtained.
adjustment should be done periodically.
carbon or other matter exists on the electrodes.
or the electrodes ore wet, the high voltage
passes through the mediums, and perfect sparking
cannot be made.
a.
It is best to use spark plug cleaner for the
cleaning, however, when a cleaner is not
available, after scraping with a piece of wire
or needle, wash with gasoline and wipe off
with a dry rag.
b.
After cleaning. adjust the electrode gap.
Adjust with a thichness gauge so that the gap
is 0. 7 to 0. 8 mm. (0. 028�0. 32 in)
6. 13)
NOTE:
111
Under no circumstance should a torch be
used to remove the deposit.
12)
When reinstalling the spark
oil and dust around the spark plug opening on
the cylinder head.
131
When installing the spark plugs, first thread
in by hand, and then tighten firmly with spark
plug wrench.
141
Spark plugs should be periodically inspected.
When tne spark plug is used for a long time,
the electrode gradually burns and the sparking
efficiency lowers.
c.
The spark plug efficiency con be detected
with a spark plug tester.
voltage,
changing the tester internal pressure.
5.
Fuel System
When the fuel system is clogged, enough fuel
is not fed to the carburetor ; and when engine
speed is raised, the engine does not operate
smoothly, and sometimes stalls at high speed.
a.
Check the fuel level.
b.
Remove the feed line from the carburetor
and check the flow when the fuel cock lever
is "ON" or "RES".
c.
When the flow is defective, dismount the
tank from the body and clean inside.
semble and clean the fuel cock too.
If the spark
a spark
is
not
produced
For this reason.
cleaning and
When
( Fi
. 6. 1 2)
g
plug,
wipe off
Applying roted
inspect the sparking condition by
(Fig. 6. 14)
(Fig.
Disas
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