Spark Plug; Cooling System Cleaning - Echo Power Pruner PPT-2400 Operator's Manual

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spark plug

Level 2.
Tools Required: 10 x 19 mm T-Wrench, Feeler gauge, Soft metal
brush
Parts Required: Spark Plug, NGK BPMR7A
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 (150 to 170 kgf·cm).

coolIng system cleanIng

Level 2.
Tools Required: Cross-head Screwdriver, 3 mm Hexagonal Wrench,
25 or 50 mm medium bristle cleaning brush
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 from spark plug.
2. Remove engine cover.
0.6 to 0.7 mm
Engine cover