18
spark plug
Level 2.
Parts Required: REPOWER
TM
Tune-Up Kit
IMPORTANT
Use only NGK BPM8Y spark plug otherwise severe engine
damage may occur.
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 150-170 kgf • cm (130-150 in • lbf).
CoolIng sysTem
Level 2.
Parts Required: None, if you are careful.
IMPORTANT
To maintain proper engine operating temperatures, cooling air must
pass freely through the cylinder n area. This ow 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 ns is
considered “Normal Maintenance.” Any failure attributed to lack of
maintenance is not warranted.
INTAKE GRILL
0.65 mm
(0.026 in.)
Cleaning Grill and Cylinder Fins
1. Remove accumulated debris from intake grill between backpack
frame and blower housing.
2. Disconnect spark plug lead from spark plug.
3. Remove spark plug
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