Cooling System Cleaning - Echo CS-305, CS-306 Instruction Manual

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COOLING SYSTEM CLEANING

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MUFFLER SPARK ARRESTOR
CS-305
CS-306
Cylinder Exhaust Port
19
Remove spark plug lead.
Remove two (2) muffler cover screws and muffler
cover (A).
Remove four (4) recoil starter housing screws and
starter housing (B).
Use a stiff bristle cleaning brush (do not us a metal
brush) to remove dirt from cylinder fins in muffler and
ignition coil areas.
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 screws and 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 deposit, be careful not to
damage the catalytic element inside muffler.
4. Replace screen if it is cracked, plugged, or has
holes burned through.
5. Assemble components in reverse order.
IMPORTANT
The cylinder exhaust port must be inspected and
cleaned of excess carbon every 3 months or 90 hours
of operation in order to maintain this engine within the
emissions durability period. ECHO strongly recom-
mends that you return your unit to your ECHO dealer
for this important maintenance service.