Echo CS-590, Руководство оператора, Страница: 50 / 64

MAINTENANCE CS-590
50 X7503264706
© 09/2020 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 1,100 feet above sea level (ASL) (96.0 kPa). To
maintain proper engine operation above 1,100 feet ASL the carburetor
might need to be adjusted by an authorized 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 can result.
1. Before adjusting carburetor clean or replace air filter and muffler “Spark
Arrestor 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.
T
L
H