32 X7503320105
© 09/2013 ECHO Inc.
MAINTENANCE CS-355T
Exhaust Port Cleaning
Level 2.
1. Remove spark plug cover and remove spark plug.
2. Release chain brake, remove guide bar nuts, sprocket
guard, guide bar, and chain.
3. Remove muffler cover.
4. Place piston at top dead center.
5. Remove muffler. Check parts for wear or damage, and
replace if necessary.
6. Use a wood or plastic scraping tool to clean deposits from
cylinder exhaust port.
Never use a metal tool to scrape carbon from the exhaust port.
Do not scratch the cylinder or piston when cleaning the exhaust
port. Do not allow carbon particles to enter the cylinder.
7. Install muffler. Tighten bolts to 7-10 N•m (60-90 in•lbf), but
do not exceed specifications, otherwise damage to bolts
may occur.
8. Connect spark plug lead and replace spark plug cover.
9. Start engine, and allow unit to warm up at idle for several
minutes.
10. Stop engine, and re-tighten muffler bolts to 7-10 N•m (60-90
in•lbf).
11. Install muffler cover.
12. Install guide bar and chain. Adjust chain tension.
13. Start engine and check for exhaust leaks between muffler and cylinder head. Stop engine if leak is
found and correct problem before operating chain saw.
Parts Required: As needed: Muffler gasket
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