25
COOling
sysTem
Cleaning
• Remove spark plug lead.
• Remove two (2) muffler cover screws and muffler
cover.
• Remove four (4) recoil starter housing screws and
starter housing.
• Use a stiff bristle cleaning brush (do not use a metal
brush) to remove dirt from cylinder fins in muffler and
ignition coil areas.
sPaRk aRResTOR muffleR
• The spark arrestor muffler controls the exhaust
noise and prevents hot, glowing particles of car-
bon from leaving the muffler.
• Make sure the spark arrestor screen is in good
repair and properly seated in the muffler.
• Certain internal combustion engines operated on
forest, brush, and/or grass-covered areas in the
states of Washington, Oregon, Idaho, California,
Minnesota, New Jersey and Maine, are required to
be equipped with a spark arrestor.
this requirement also applies to all U.s. Forest service
lands. in some of these areas, the spark arrestor system
must be certified per USDA Forest Service Regulation SAE
J335.
Check with your local or state authorities for specific regula
-
tions in your area. Failure to follow these requirements is a
violation of the law.
sPaRk
aRResTOR
Cleaning
IMPORTANT
Carbon deposits in muffler will cause a drop in engine
output and overheating. spark arrestor screen must be
checked periodically.
1. Remove muffler cover.
2. Remove spark arrestor screen cover, gaskets, and
screen from muffler body.
3. Clean carbon deposits from muffler components.
NOTE
When cleaning carbon deposits, be careful not to dam-
age the catalytic element inside muffler.
4. Replace screen if it is cracked, plugged, or has holes
burned through.
5. assemble components in reverse order.
