Operator's Manual

19
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
Model 53010 & 53011
1. With the engine cool (ambient or room temperature),
remove the socket head screw holding the muffler
cover, then remove the muffler cover (Fig. 30).
2. Loosen the cylinder cover screw and remove the
cylinder cover (Fig. 29).
3. Clean all dirt and debris from the cooling fins and
from around the cylinder base.
4. Reinstall the cylinder cover and the muffler cover
(Figs 30 and 29).
Model 53002 & 53003
1. With the engine at ambient (room) temperature, loosen
the knob and remove the air cleaner cover (Fig. 33).
2. Loosen the knob and lift off the cylinder cover
(Fig. 33).
3. Clean all dirt and debris from the cooling fins and
from around the cylinder base.
4. Reinstall the cylinder and air cleaner covers (Fig. 33).




m-3041
Figure 33
1. Air Filter Cover
2. FIlter Screen
3. Foam Ring
Spark Arrester
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.