Echo CS-352 Cooling System Cleaning, Spark Arrestor Muffler, periodically, Maintenance

MAINTENANCE	CS-352
Cooling System Cleaning
• Check periodically.	Cylinder fins
• Clogged fins will result in poor engine cooling.

1.Remove cylinder cover and starter.

2.Use compressed air or wooden tool to remove

dirt and dust from between fins to let cooling air pass easily.

Spark Arrestor Muffler

•The spark arrestor muffler controls the exhaust noise and prevents hot, glowing particles of carbon from leaving the muffler.

•Make sure the spark arrestor screen is in good repair and properly seated in the muffler.

•Certain internal combustion engines operated on forest, brush, and/or grass-covered areas in the states of Washington, Oregon, Idaho, California, Minnesota, New Jersey and Maine, are required to be equipped with a spark arrestor.

This requirement also applies to all U.S. Forest Service lands. In some of these areas, the spark arrestor system must be certified per USDA Forest Service Regulation SAE J335.

Check with your local or state authorities for specific regulations in your area. Failure to follow these requirements is a violation of the law.

Spark Arrestor Screen	A
Carbon deposits in muffler will cause drop in engine output and	B
overheating. Spark arrestor screen must be checked	C
periodically.

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

2.Remove spark arrestor cover (C) and screen (B) from muffler (A) body.

3.Clean carbon deposits from muffler components.

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

5.Assemble components in reverse order.

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

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