Exhaust Port Cleaning - Echo shindaiwa 402s Operator's Manual

402S
5. Assemble components in reverse order.
Note: When cleaning carbon deposit, be careful not to damage the
catalytic element inside muffler.

Exhaust Port Cleaning

Level 2.
Parts Required:
1. Remove air cleaner cover and
remove spark plug lead.
2. Remove engine cover.
3. Place piston at top dead center.
4. Remove muffler. Check parts for
wear or damage, and replace if
necessary.
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.
5. Use a wood or plastic scraping
tool to clean deposits from
cylinder exhaust port.
6. Install muffler. Tighten muffler
mounting bolts (or nuts) to
8-11 N•m (70-95 lbf•in).
7. Install engine cover and attach
spark plug lead.
8. Replace air cleaner cover.
9. Start engine, and allow unit to
warm up at idle for several minutes.
10. Stop engine, and re-tighten mounting bolts (or nuts) to 8-11 N•m
(70-95 lbf•in).
11. Install guide bar and chain. Adjust chain tension.
12. 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.
X7503256304
© 11/23 ECHO Incorporated
As needed: Muffler gasket
MAINTENANCE
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