HC-2420/3020 MAINTENANCE
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© 1/2015 ECHO Inc.
1. Remove muffler cover.
2. Place piston at Top Dead Center (TDC) to prevent carbon/dirt from entering cylinder.
3. Remove exhaust guide (A), gasket (B), and screen (C) from muffler body.
4. Clean carbon deposits from muffler components.
Note: When cleaning carbon deposits, be careful not to
damage the catalytic element inside muffler.
5. Replace screen if it is cracked, plugged, or has holes burned
through.
6. Assemble components in reverse order.
Exhaust Port Cleaning
Level 2.
1. Remove spark plug lead from spark plug, and remove
engine cover.
2. Place piston at top dead center. Remove muffler (D) and
heat shield (E).
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 70-80 kgf•cm
(60-70 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.
Carburetor Adjustment
The blades must not move at idle, otherwise serious personal injury may result. Periodic carburetor
adjustment may be necessary to assure blades do not move at idle.
If blades move, readjust carburetor according to these instructions, or see your ECHO Dealer.
Parts Required: Spark Arrestor Screen, Gasket
Parts Required: As needed: Heat Shield
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