Echo Instruction Manual

25
COOling sysTem Cleaning
• Remove spark plug lead.
• Remove two (2) mufer cover screws and mufer
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 ns in mufer and
ignition coil areas.
sPaRk aRResTOR muffleR
• The spark arrestor mufer controls the exhaust
noise and prevents hot, glowing particles of car-
bon from leaving the mufer.
• Make sure the spark arrestor screen is in good
repair and properly seated in the mufer.
• 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 certied per USDA Forest Service Regulation SAE
J335.
Check with your local or state authorities for specic regula-
tions in your area. Failure to follow these requirements is a
violation of the law.
sPaRk aRResTOR Cleaning
IMPORTANT
Carbon deposits in mufer will cause a drop in engine
output and overheating. Spark arrestor screen must be
checked periodically.
1. Remove mufer cover.
2. Remove spark arrestor screen cover, gaskets, and
screen from mufer body.
3. Clean carbon deposits from mufer components.
NOTE
When cleaning carbon deposits, be careful not to dam-
age the catalytic element inside mufer.
4. Replace screen if it is cracked, plugged, or has holes
burned through.
5. Assemble components in reverse order.