Spark Plug; Cooling System - Echo HC-151 Operator's Manual

18

SPARK PLUG

Level 2.
Tools required: T-wrench, Feeler gauge, Soft metal brush
Parts required: REPOWER
IMPORTANT
Use only NGK BPM-8Y spark plug (BPMR-8Y in Canada) 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 kg/cm (130-150 in. lb.).

COOLING SYSTEM

Level 2.
Tools required: 3 mm Hex wrench, 25 or 50 mm (1 or 2 in.) cleaning
brush
Parts required: None if you are careful.
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 in the crankcase 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 crankcase cooling passage blockages or cleaning of cooling
fins is considered "Normal Maintenance." Any failure attributed to lack
of maintenance is not warranted.
Tune-Up Kit P/N 90074
TM
0.65 mm
(0.026 in.)