Echo GT-2150 Operator's Manual page 22

0.6 mm to 0.7 mm
Engine cover
GT-2150/2150S
Cylinder fins
Air intake
Heat shield spark arrestor
Silencer
Silencer lid
Gasket
CHECK SPARK PLUG
•
Check plug gap. Correct gap is 0.6 to 0.7 mm.
•
Inspect electrode for wear.
•
Inspect insulator for oil or other deposits.
•
Replace plug if needed and tighten to 14.2 -
15.2 N·m (145 to 155 kgf·cm ).
COOLING SYSTEM MAINTENANCE
CAUTION
To maintain proper engine operating
temperature, 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,
or
• • • • • Dust and grass build up on the out
side of the cylinder.
This build-up insulates the engine and
prevents the heat from leaving.
Removal of cooling passage blockages or
cleaning of cylinder fins is considered
"Normal Maintenance".
Any resultant failure attributed to lack of
maintenance is not warranted.
•
Remove dust and dirt from between fins.
CLEANING SILENCER AND EXHAUST
PORT
•
Remove spark plug lead from spark plug, and
throttle cable from carburettor swivel.
•
Remove the four screws which secure engine
cover.
•
Remove engine cover.
•
Remove silencer and heat shield.
•
Place piston at top dead centre.
Clean deposits from silencer and cylinder
exhaust port.
NOTE
Be careful not to scratch the cylinder or piston
when cleaning the cylinder exhaust port.
•
Inspect gasket, replace if damaged.
•
Install heat shield and silencer.
•
Install silencer lid.
•
Install engine cover and spark plug lead.
22