Echo CS-2511T Operator's Manual page 44

MAINTENANCE
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 may
result.
6. 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.
7. Check idle speed and reset if necessary as described in item 5. If a
tachometer is available idle speed should be set to value listed on
technical data page.
When starting, idling adjustment speed should be adjusted to
prevent the saw chain from moving. When you experience
trouble with the carburetor, contact your dealer.
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CS-2511T
X7503332503
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