G
RASS
T
RIMMER
/B
RUSH
C
UTTER
O
PERATOR
'
S
M
ANUAL
25
CARBURETOR
ADJUSTMENT
Engine Break-In
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.
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).
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 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, blades should not move
at idle, otherwise serious personal injury may result.
A
