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SPARK PLUG
Level 2.
Tools required: 13 x 19 mm (1/2 x 3/4 in.) T-Wrench, Feeler gauge
(preferably a wire gauge), Brush
Parts Required: Spark Plug, NGK BPM-7Y, P/N 99944500071
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 SYSTEM CLEANING
Level 3.
Tools required: 13 x 19 mm (1/2 x 3/4 in.) T-Wrench, 3mm Hex Wrench,
Cross Head Screwdriver, Pointed Wood Stick, 25-50 mm (1 in. or 2 in.)
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.
Cleaning Grill
Remove accumulated debris from crankcase intake grille (A) above the
fuel tank.
Cleaning Cylinder Fins
1. Remove spark plug.
2. Remove engine cover (seven screws) and clean cylinder fins to
allow cooling air to pass freely.
0.65 mm
(0.026 in.)
A