Echo SRM-266 Operator's Manual page 38

MAINTENANCE
Removal of cooling passage blockages or cleaning of cooling fins is
considered "Normal Maintenance." Any failure attributed to lack of
maintenance is not warranted.
1. Remove spark plug lead.
2. Remove air cleaner cover.
3. Remove muffler cover (A).
4. Remove engine cover (B).
DO NOT use a metal scraper to remove dirt from the cylinder fins.
5. Use brush to remove dirt from
the cylinder fins.
6. Remove grass and leaves from
the grid between the recoil
starter and fuel tank.
7. Assemble components in reverse
order.
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SRM-266
B
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A
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