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ARTH
A
UGER
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PERATOR
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S
M
ANUAL
19
CARBURETOR
ADJUSTMENT
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 Adjustment
High altitude adjustment is not required for proper operation of this
engine.
Level 2.
Tools required: Screwdriver, Tachometer (ECHO P/N 99051130017).
Parts required: None.
NOTE
Every unit is run at the factory and the carburetor is set in compli-
ance with emission regulations. This carburetor does not have
acceleration and high speed adjustment needles.
1.
Check idle speed and reset if necessary. Idle speed screw (A)
should be set to the specifications found on page 22, "Specifica-
tions" of this manual. 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.
A
