Echo HC-150 Operator's Manual

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18spark plugLevel 2.Parts required: REPOWERTM Tune-Up KitIMPORTANTUse only NGK BPM-8Y spark plug (BPMR-8Y in Canada) other-wise severe engine damage may occur.1. Remove spark plug and check for fouling, worn and rounded centerelectrode.2. Clean the plug or replace with a new one. DO NOT sand blast toclean. 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 sysTemLevel 2.Parts required: None if you are careful.IMPORTANTTo maintain proper engine operating temperatures, cooling air mustpass freely through the cylinder fin area. This flow of air carriescombustion heat away from the engine.Overheating and engine seizure can occur when:• Air intakes in the crankcase are blocked, preventing cooling air fromreaching the cylinder.• Dust and grass build up on the outside of the cylinder. This build upinsulates the engine and prevents the heat from leaving.Removal of crankcase cooling passage blockages or cleaning of coolingfins is considered “Normal Maintenance.” Any failure attributed to lackof maintenance is not warranted.0.65 mm(0.026 in.)