Echo X772000164 Exhaust System, Spark Arrestor Screen, Exhaust Port Cleaning, Maintenance

MAINTENANCE SHC-266

Exhaust System

Spark Arrestor Screen

Level 2

Parts Required: Spark Arrestor Screen, Gasket

1.Remove spark plug lead.

2.Remove muffler cover (A).

3.Place piston at Top Dead Center (TDC) to prevent carbon/dirt from entering cylinder.

4.Remove spark arrestor screen (D), gasket (C) and exhaust guide (B) from muffler body.

5.Clean carbon deposits from muffler components.

A

C

DB

Note: When cleaning carbon deposits, be careful not to damage the catalytic element inside muffler.

6.Replace screen if it is cracked, plugged, or has holes burned through.

7.Assemble components in reverse order.

Exhaust Port Cleaning	B	A
Level 2

Parts Required: As needed; Heat Shield

1.Remove spark plug lead from spark plug, and remove engine cover.

2.Place piston at top dead center. Remove muffler (A) and heat shield (B).

3.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.

4.Inspect heat shield, and replace if damaged.

5.Install heat shield and muffler.

6.Tighten muffler mounting bolts (or nuts) to 90–110 kgf • cm (80–95 in • lbf).

7.Install engine cover and attach spark plug lead.

8.Start engine, and warm to operating temperature.

9.Stop engine, and re-tighten mounting bolts (or nuts) to specifications.

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