Echo SRM-267 Operator's Manual page 24

Maintenance and care
Cooling system maintenance
 To maintain proper engine operating temperature, cooling air must pass freely through the cylinder fin area. This
flow of air carries combustion heat away from the engine. Overheating and engine seizure can occur when:
 Air intakes are blocked, preventing cooling air from reaching the cylinder.
 Dust and grass build up on the outside of the cylinder. This build-up insulates the engine and prevents the heat
from leaving.
Removal of cooling passage blockages or cleaning of cylinder fins is considered "Normal Maintenance". Any resultant failure
attributed to lack of maintenance is not warranted.
Cleaning silencer
Check fuel system
Check spark plug
a: 0.6 - 0.7 mm
IMPORTANT
Air intake
 Remove dust and dirt from between fins (A).
 Before each use, remove accumulated debris from bottom en-
gine intake grille located between the fuel tank and starter.
 Carbon deposits in silencer (A) will cause a drop in engine out-
put and overheating. Spark arrestor screen must be checked
periodically. Clean deposits from silencer.
IMPORTANT
Do not remove the silencer cover. If necessary, Please consult
your dealer.
 Check before every use.
 After refuelling, make sure fuel does not leak or exude from
around fuel pipe (A), fuel grommet (B) or fuel tank cap (C).
 In case of fuel leakage or exudation, there is a danger of fire.
Stop using the machine immediately and request your dealer
to inspect or replace.
1. Check plug gap. Correct gap is 0.6 mm to 0.7 mm.
2. Inspect electrode for wear.
3. Inspect insulator for oil or other deposits.
4. If the spark plug is dirty, clean it. Do not sandblast to clean.
Remaining sand will damage engine.
5. If the electrodes or terminals are worn, or if there are cracks
in the ceramics, replace them with new parts. (see Specifi-
cationspage 28)
6. Tighten to 15 N·m - 17 N·m (150kgf·cm to 170 kgf·cm).
 The spark test (for checking whether the spark plug is spark-
ing) must be carried out by your dealer.
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