Exhaust System - Echo SRM-280U Operator's Manual

SRM-280U

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 cover (B), gaskets (C), and
screen (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 Cleaning
Level 2.
Parts Required: As needed: Heat Shield
1. Remove spark plug lead from spark plug, and remove
muffler cover.
2. Place piston at top dead center. Remove muffler (A), heat
shield (B), and eye plate (C).
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, 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) to
specifications.
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MAINTENANCE
D
C
B
A
B
A
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