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Cylinder Cooling Fins
Maintenance Interval
The cylinder cooling fins should be cleaned after every
25 hours of operation, or once a week, whichever
comes first.
Air must flow freely around and through the cylinder
cooling fins to prevent engine overheating. Leaves,
grass, dirt and debris buildup on the fins will increase
the operating temperature of the engine, which can
reduce engine performance and shorten engine life.
Cooling Fin Cleaning
1.
With the engine at ambient (room) temperature,
loosen the knob and remove the air filter cover.
Knob
High Tension Lead Boot
Air filter Cover
Knob
2.
Twist the high tension lead boot on the spark plug
back and forth a couple of times to loosen the
boot, then pull the boot off of the spark plug.
3.
Loosen the knob and lift off the cylinder cover.
4.
Clean all dirt and debris from the cooling fins and
from around the cylinder base.
5.
6.
Spark Arrester
POTENTIAL HAZARD
• Muf fler sur face becomes hot when
WHAT CAN HAPPEN
• Contact with hot muffler surfaces could
HOW TO AVOID THE HAZARD
• Make sure the muf fler is cool before
Cylinder Cover
Maintenance Interval
Spark Arrester Maintenance
Cooling Fins
1.
2.
— US-23 —
DO NOT overlook cleaning of the cooling air
intake area below the crankcase and above the
fuel tank! This area must be free of debris and
obstruction for the engine to cool properly.
Reinstall the fan cover and the filter cover.
k
WARNING
Edger is in operation and remains hot
for some time after the engine is shut
off.
cause a burn.
inspecting and cleaning the spark
arrester.
• The spark arrester should be inspected and
cleaned after every 25 hours of use.
• Replace the screen if it cannot be thoroughly
cleaned, or if it is damaged.
With the engine at ambient (room) temperature,
loosen the knob and remove the air cleaner cover.
Twist the high tension lead boot on the spark plug
back and forth a couple of times to loosen the
boot, then pull the boot off of the spark plug.
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