Carburetor Adjustment - Echo HC-151 Operator's Manual

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 Adjustment
This engine has been factory adjusted to maintain satisfactory starting,
emission, and durability performance up to 1,000 feet above mean sea
level (MSL). To maintain proper engine operation above 1,000 feet MSL
the carburetor must be adjusted by an authorized ECHO service dealer.
IMPORTANT
If the engine is adjusted for operation above 1,000 feet MSL, the
carburetor must be re-adjusted when operating the engine below
1,000 feet MSL, otherwise severe engine damage can result.
Level 2.
Tools required: Screwdriver, Tachometer (ECHO P/N 99051130017).
Parts required: None.
NOTE
Every unit is run at the factory and the carburetor is set in compli-
ance with emission regulations. This carburetor does not have
acceleration and high-speed adjustment needles.
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
page 27 "Specifications" of this manual. Turn idle screw (A)
clockwise to increase idle speed; counter clockwise to decrease idle
speed.
DANGER
When carburetor adjustment is completed, the cutting attachment
should not move at idle, otherwise serious personal injury may
result.
H C
EDGE
O ' M
PERATOR S
21
LIPPER
ANUAL
A