20
Exhaust Port Cleaning
Level 2
Tools required:
3 mm Hexagon wrench, Wood or plastic scraper
Parts Required:
As needed: Heat Shield
1. Remove spark plug lead from spark plug, and remove engine cover
(4 screws).
2. Place piston at top dead center. Remove muffler (A), heat shield (B),
and eyeplate (C).
3. Use a wood or plastic scraping tool to clean deposits from cylinder
exhaust port.
IMPORTANT
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 eyeplate.
6. Tighten muffler mounting bolts (or nuts) to 80-95 in•lbf (90-110
kgf•cm).
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 specifica
-
tions.
carburetor
adjustment
WARNING
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.
Engine Break-In
New engines must be operated a minimum duration of two tanks of fuel
break-in before carburetor adjustments can be made. During the break-
in period your engine performance will increase and exhaust emissions
will stabilize. Idle speed can be adjusted as required.
High Altitude Operation
This engine has been factory adjusted to maintain satisfactory starting,
emission, and durability performance up to 1,100 feet above sea level
(ASL) (96.0 kPa). To maintain proper engine operation and emission
compliance above 1,100 feet ASL the carburetor may need to be ad-
justed by an authorized ECHO service dealer.
A
B
C
