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6. Assemble components in reverse order.
NOTE
When installing the engine/muffler cover, be certain the tabs of the
metal deflector shield are in the slots of the cover.
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.
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 9, "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