Echo CS-450P instruction manual Exhaust Port Cleaning, Level

MAINTENANCE CS-450P

Exhaust Port Cleaning

Level 2.

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.

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 muffler mounting bolts (or nuts) to 7-11 N•m (60-95 in•lbf).

8.Install muffler support bracket (A).

9.Install guide bar and saw chain. See "Guide Bar and Saw Chain Installation/Removal."

10.Install spark plug lead and air cleaner cover.

11.Start engine, and warm to operating temperature. Stop engine.

12.Remove air cleaner cover and remove spark plug lead.

A

13.Remove guide bar and saw chain. See "Guide Bar and Saw Chain Installation/Removal."

14.Remove muffler support bracket.

15.Re-tighten mounting bolts (or nuts) to 7-11 N•m (60-95 in•lbf).

16.Install muffler support bracket.

17.Install guide bar and saw chain. See "Guide Bar and Saw Chain Installation/Removal."

18.Install spark plug lead and air cleaner cover.

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