MAINTENANCE CS-31048 X7503275401© 02/2019 ECHO Inc.Spark Arrestor ScreenCarbon deposits in muffler will cause drop in engine output andoverheating. Spark arrestor screen must be checked periodically.1. Remove air cleaner cover andremove spark plug lead.2. Remove spark arrestor cover (C)and screen (B) from muffler (A)body.3. Clean carbon deposits frommuffler components.4. Replace screen if it is cracked, orhas holes burned through.5. Assemble components in reverseorder.Note: When cleaning carbon deposit, be careful not to damage thecatalytic element inside muffler.Exhaust Port CleaningLevel 2.1. Remove cylinder cover andremove spark plug lead.2. Place piston at top dead center.3. Remove muffler. Check parts forwear or damage, and replace ifnecessary.Never use a metal tool to scrape carbon from the exhaust port. Donot scratch the cylinder or piston when cleaning the exhaust port. Donot allow carbon particles to enter the cylinder.Parts Required: As needed: Muffler gasketABC