Echo SRM-236 Operator's Manual page 25

Air intake
Cleaning silencer
Check fuel system
Check spark plug
a: 0.6 ‑ 0.7 mm
Maintenance and care
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.
1. Remove the silencer cover.
2. Remove the spark arrester screen cover (C) and the screen
(B) from the silencer body.
3. Clean carbon deposits from silencer components (A).
4. Replace the screen if it is cracked, or has holes burned
through.
5. Assemble the components in reverse order.
Carbon deposits in silencer will cause drop in engine out-
put.The spark arrester screen must be checked periodically.
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 electrodesor terminals are worn, or if there are cracks
in the ceramics, replace them with new parts.
5. 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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NOTE