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CARBURETOR ADJUSTMENT
H:HIGH SPEED
NEEDLE
T: IDLE SPEED
ADJUSTMENT
KNOB
L: LOW SPEED
NEEDLE
21
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.
1. Before adjusting carburetor clean or replace air
filter and muffler, "Spark Arrestor Screen".
2. 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.
3. Stop engine.
Turn "H" speed needle counterclockwise (CCW)
to stop.
Turn "L" speed needle midway between full
clockwise (CW) stop and CCW stop.
4. Idle Speed Adjustment:
• Start engine, turn "Idle" speed adjustment
knob CW until the wheel begins to turn, then
turn knob out CCW until the wheel stops
turning.
Turn knob out, CCW, an additional 1/4 turn.
Cutting attachment must not move when unit
is idling.
5. Accelerate to full throttle for 2 - 3 seconds to
clear any excess fuel in the engine, then return
to idle.
Accelerate engine to full throttle to check for
smooth transition from idle to high speed.
If engine hesitates turn "L" needle CCW 1/8 turn
and repeat acceleration.
Continue adjustment until smooth acceleration
results.
6. Check idle speed and reset if necessary as
described in item 4. If a tachometer is available
idle speed should be set to 2,900 - 3,100 r/min.
When starting, idling adjustment speed should
be adjusted not to rotate the wheel.
Correct idle speed is adjusted 2,900 to 3,100
r/min. Or 1/4 turn CCW from the point the wheel
stops moving.
When there is some trouble with the carburetor,
contact your dealer.
WARNING
CAUTION
CSG-670 TYPE1-E
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