26
A
CARBURETOR ADJUSTMENT
NOTE
New engines must be operated for a minimum of two tanks of fuel
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
High altitude adjustment is not required for proper operation of this
engine.
Emissions Adjustments
Every unit is run at the factory and the carburetor is set in compliance
with applicable emission regulations. This carburetor does not have
acceleration and high speed adjustment needles.
Idle Speed Adjustment
Idle speed adjustment may be required periodically to comply with
specifications for this unit. See page 11, "Specifications" for correct idle
speed.
Level 2.
Tools required: Screwdriver, Tachometer (ECHO P/N 99051130017).
Parts required: None.
1. Check idle speed using a tachometer, and reset if necessary. Turn
idle screw (A) clockwise to increase idle speed; counter-clockwise
to decrease idle speed.
WARNING DANGER
When carburetor adjustment is completed, the cutting attachment
should not turn at idle, otherwise serious personal injury may result.
Cylinder Exhaust Port
Level 3
IMPORTANT
The cylinder exhaust port must be inspected and cleaned of excess
carbon every 3 months or 90 hours of operation in order to maintain
this engine within the emissions durability period. ECHO strongly
recommends that you return your unit to your ECHO dealer for this
important maintenance service.
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