Echo X7503196704 - Manual (Page 28)

28 CS-450
EXHaUST POrT CLEaning
Parts Required: As needed: Muffler gasket
1. Remove air cleaner cover and remove spark plug
lead.
2. Remove guide bar and saw chain. See "Guide Bar
and Saw Chain Installation/Removal."
3. Remove muffler support bracket (A).
4. Place piston at top dead center. Remove muffler (B)
and muffler gasket (C ).
5. Use a wood or plastic scraping tool to clean depos-
its from cylinder exhaust port.
iMPOrTanT
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.
6. Inspect muffler gasket, and replace if damaged.
7. Install muffler gasket and muffler.
8. Tighten muffler mounting bolts (or nuts) to 60-95 in •
lbf (70-110 kgf • cm).
9. Install muffler support bracket (A).
10. Install guide bar and saw chain. See "Guide Bar and
Saw Chain Installation/Removal."
11. Install spark plug lead and air cleaner cover.
12. Start engine, and warm to operating temperature.
Stop engine.
13. Remove air cleaner cover and remove spark plug
lead.
14. Remove guide bar and saw chain. See "Guide Bar
and Saw Chain Installation/Removal."
15. Remove muffler support bracket.
16. Re-tighten mounting bolts (or nuts) to specifications.
17. Install muffler support bracket.
18. Install guide bar and saw chain. See "Guide Bar and
Saw Chain Installation/Removal."
19. Install spark plug lead and air cleaner cover.
B
a
C