LONCIN LC2P73F - Spark Plug Maintenance

Part III Maintenance
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than 30 psi) through the filter from the inside. Never try to brush off the dirt. Brushing will force dirt into the
filter fibers.
5. Use a damp rag to wipe any dirt from the inside of the air cleaner base and cover. Be careful not to allow dirt
into the duct leading to the carburetor.
6. Install filter in reverse order of removal
CAUTION: Operating the engine without an air filter, or with a damaged air filter, will allow dirt to enter
the engine, causing rapid engine wear. This type of damage is not covered by the Distributor’s Limited
Warranty.
3-4 Maintenance of spark plug
Recommended types: BOSCH F7RTC NHSP BP7RES
CHAMPION RN9YC
The replacement of spark plug has the following
advantages:
Guarantee the continuous spark; start with more
reliability; better fuel conservation
Note
The use of spark plug with incorrect models and
heat values may reduce the engine performance or
damage the engine.
1. Take off the spark plug cap and remove dusts around
the spark plug.
2. Dismantle the spark plug with socket wrench for spark plug.
3. Check if the electrode of the spark plug is excessive worn,
and if the insulator is cracked or if there is too much carbon
deposition.
If it can be continuously used, use the steel wire brush to
remove impurities such as carbon deposition.
4. Measure the electrode clearance of the spark plug with a
feeler gauge and the correct clearance shall be 0.7 ~ 0.8 mm.
If it requires adjustment, slightly tap (when the clearance
is huge) or pry the electrode with a slotted screwdriver (when
0.7-0.8 mm
Side
electrode
Steel wire brush
Spark
plug cap