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© 08/2013 ECHO Inc.
MAINTENANCE CS-310
Air Filter
1. Check before every use.
2. Close choke ( ).
3. Press hand guard forward and close choke.
4. Release the cylinder cover latches (C) and remove
cylinder cover (A) and air filter (B).
5. Lightly brush dust off air filter, or clean with
compressed air, or replace the air filter.
6. Install air filter and cylinder cover, engage latches.
Spark Plug
• Check periodically.
• The standard spark gap is 0.65 mm (0.026 in.).
• Fastening torque:13 to 17 N•m (110 to 150 in•lbf).
1. Remove cylinder cover and remove spark plug.
2. Correct the spark gap if it is wider or narrower than the standard gap.
Check Fuel System
• Check before every use.
• After refueling, make sure fuel does not leak from around fuel pipe, fuel grommet or fuel tank cap.
• In case of fuel leakage there is a danger of fire. Stop using the machine immediately and request your
dealer to inspect or replace.
Fuel Filter
• Check periodically.
• Do not allow dust to enter fuel tank.
• A clogged filter (A) will cause difficulty in starting engine
or abnormalities in engine performance.
1. Using a wire bent into the shape of a hook, pull filter
out through gas port, and inspect filter.
2. When the filter is dirty, replace it.
3. When the inside of the fuel tank is dirty, rinse the tank out with gasoline to clean it.
Note: Federal EPA regulations require all model year 2012 and later gasoline powered engines produced for
sale in the United States to be equipped with a special low permeation fuel supply hose between the
carburetor and fuel tank. When servicing model year 2012 and later equipment, only fuel supply
hoses certified by EPA can be used to replace the original equipment supply hose. Fines up to
$37,500 may be enforced for using an un-certified replacement part.
A
B
C
0.65 mm (0.026 in.)
A