Echo SRM-280U Operator's Manual

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X7502310910 29© 3/2015 ECHO Inc.SRM-280U MAINTENANCEExhaust SystemSpark Arrestor ScreenLevel 2.1. Remove spark plug lead.2. Remove muffler cover (A).3. Place piston at Top Dead Center (TDC) to preventcarbon/dirt from entering cylinder.4. Remove spark arrestor screen cover (B), gaskets (C), andscreen (D), from muffler body.5. Clean carbon deposits from muffler components.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 CleaningLevel 2.1. Remove spark plug lead from spark plug, and removemuffler cover.2. Place piston at top dead center. Remove muffler (A), heatshield (B), and eye plate (C).3. Use a wood or plastic scraping tool to clean deposits fromcylinder exhaust port.Never use a metal tool to scrape carbon from the exhaust port. Do not scratch the cylinder or piston whencleaning the exhaust port. Do not allow carbon particles to enter the cylinder.4. Inspect heat shield, and replace if damaged.5. Install heat shield, muffler, and eye plate.6. Tighten muffler mounting bolts (or nuts) to 60-80 kgf•cm(53-70 in•lbf).7. Install muffler cover and attach spark plug lead.8. Start engine, and warm to operating temperature.9. Stop engine, and re-tighten mounting bolts (or nuts) tospecifications.Parts Required: Spark Arrestor Screen, GasketParts Required: As needed: Heat ShieldC BDAABC