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SPARK PLUG
Level 2.
Tools required: Scrench (combination socket wrench and screwdriver),
Feeler gauge (preferably a wire gauge) , Brush.
Parts Required: Spark Plug, SRM-2100SB NGK BPM-7A
SRM-2400SB NGK BPM-7Y
1. Remove spark plug and check for fouling, worn and rounded
center electrode.
2. Clean the plug or replace with a new one. DO NOT sand blast to
clean. Remaining sand will damage engine.
3. Adjust spark plug gap by bending outer electrode.
4. Tighten spark plug to 145-155 kg/cm (125-135 in. lb.).
COOLING SYSTEMS CLEANING
Level 3.
Tools required: Cross Head Screwdriver, 3 mm Hex Wrench, Pointed
Wood Stick, Cleaning brush (1" - 2" medium bristle paint brush).
Parts Required: None if you are careful.
IMPORTANT
To maintain proper engine operating temperatures, cooling air must
pass freely through the cylinder fin area. This flow of air carries
combustion heat away from the engine.
Overheating and engine seizure can occur when:
• Air intakes are blocked, preventing cooling air from reaching the
cylinder.
• Dust and grass build up on the outside of the cylinder. This build up
insulates the engine and prevents the heat from leaving.
Removal of cooling passage blockages or cleaning of cooling fins is
considered “Normal Maintenance”. Any failure attributed to lack of
maintenance is not warranted.
1. Remove spark plug lead and throttle linkage end from the carburetor
swivel.
2. Remove the three screws that retain the engine cover (A). Two at the
top of the recoil starter, one in the arm rest. Lift the cover from the
engine.
0.65 mm
(0.026 in.)
A