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GRASS TRIMMER/BRUSH CUTTER
OPERATOR'S MANUAL
23
SPARK PLUG
Level 2.
Tools Required: Scrench (combination socket wrench & screw driver)
Feeler gauge, preferably a wire gauge. Brush.
Parts Required: Spark Plug, NGK BPM-7A
1. Remove spark plug and check for wear or fouling.
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. Install spark plug and tighten to 145-155 kg/cm (125-135 in. lb.).
COOLING SYSTEMS CLEANING
Level 2.
Tools required: Pointed Wood Stick, 25-50 mm (1 -2 in.) medium
bristle paint brush.
Parts Required: No parts are required if care is used during cleaning.
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. Disconnect spark plug lead from spark plug.
2. Remove three (3) screws from muffler cover, and remove cover.
3. Use the wooden stick or brush to remove dirt from the cylinder fins
and muffler area.
0.65 mm
(0.026 in.)