PB-770 H/T MAINTENANCE
X7531125807 35
© 01/2020 ECHO Incorporated
Spark Plug
Level 2.
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 kgf • cm (130-150 in • lbf).
Cooling System
Level 2.
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.
Parts Required: Tune-up Kit
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