Echo HC-155 - Manual (Page 24)

24 X7502256706
© 9/2013 ECHO Inc.
MAINTENANCE HC-155
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 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.
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.
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 adjusted by an authorized ECHO
service dealer.
If the engine is adjusted for operation above 1,100 feet ASL, the carburetor must be re-adjusted when
operating the engine below 1,100 feet ASL, otherwise severe engine damage may result.
Level 2.
Note: Every unit is run at the factory and the carburetor is set in compliance with emission regulations.
Carburetor adjustments, other than idle speed, must be performed by an authorized ECHO dealer.
1. Check idle speed and reset if necessary. If a tachometer is
available, idle speed screw (A) should be set to the
specifications found on “Specifications” page of this
manual. Turn idle screw (A) clockwise to increase idle
speed; counter clockwise to decrease idle speed.
When carburetor adjustment is completed, the cutting
attachment should not move at idle, otherwise serious
personal injury may result.
Parts Required: None
A