Echo CS-2511TN, Руководство оператора

Страница: 53 / 64

CS-2511TN MAINTENANCE
X7503334400 53
© 11/22 ECHO Incorporated
Carburetor Adjustment
Every unit is run at the factory and the carburetor is set in compliance with
emission regulations. In addition, the carburetor is equipped with “ H ” (High
Speed) and “ L ” (Low Speed) needle adjustment limiters that prevent
settings outside acceptable limits.
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 and
durability performance up to 335 m (1,100 ft.) above sea level (ASL)
(96.0 kPa). To maintain proper engine operation above 335 m (1,100 ft.)
ASL the carburetor might need to be adjusted by an authorized service
dealer.
If the engine is adjusted for operation above 335 m (1,100 ft.) ASL,
the carburetor must be readjusted when operating the engine below
335 m (1,100 ft.) ASL, otherwise severe engine damage can result.
1. Before adjusting carburetor clean or replace air filter and muffler spark
arrester screen.
2. Make sure the bar and chain are properly adjusted.
3. Start engine and run several minutes to bring to operating temperature.
Flash choke twice during warm-up to clear any air from the fuel system.
4. Stop engine. Turn “ H ” High Speed needle counterclockwise (CCW) to
stop. Turn “ L ” Low Speed needle midway between full clockwise (CW)
stop and CCW stop.
5. Idle Speed Adjustment:
• Start engine, turn Idle speed adjustment screw “
T ” CW until the saw
chain begins to move, then turn screw out CCW until the saw chain
stops moving. Turn screw out, CCW, an additional 1/4 turn.
When carburetor adjustment is completed, the saw chain
should not move at idle, otherwise serious personal injury can
result.