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18
INTAKE
GRILL
0.65 mm
(0.026 in.)
WARNING DANGER
Muffler and catalytic mufflers operate at extremely high tempera-
tures. Muffler area must be kept clean. Do not perform maintenance
on the engine or muffler until engine and muffler are completely
cool, otherwise serious personal injury may occur.
SPARK PLUG
Level 2.
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 15 - 17 N•m (130 - 145 in. lb.).
COOLING SYSTEMS
Level 2.
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
• Brush accumulated debris from intake grill.