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,
remove the one screw retaining the muffler cover,
then remove the muffler cover.
Cylinder Cover
Sylinder Cover screw
2. Loosen the cylinder cover screw and lift off the
cylinder cover.
3. Clean all dirt and debris from the cooling fins and
from aro_und the cylinder base.
4. Reinstall the cylinder and muffler covers.
Spark Arrester
A
WARNING
POTENTIAL HAZARD
• Muffler surface becomes hot when
Trimmer is in operation and remains
hot for some time after the engine is
shut off.
WHAT CAN HAPPEN
• Contact with hot muffler surfaces could
cause
a
burn.
HOW TO AVOID THE HAZARD
• Make sure the muffler is cool before
inspecting and cleaning the spark
arrester.
Maintenance Interval
• 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.
Spark Arrester Maintenance
1. With the engine at ambient (room) temperature,
remove the one screw retaining the muffler cover,
then remove the muffler cover.
2. Remove the two socket head screws holding the
spark arrester assembly to the muffler.
Plate
Muffler
SOCket Head Screw (4)
-20-
