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15
ADJUSTING CARBURETOR
(As Required)
GENERAL INFORMATION
The idle speed adjuster screw controls the throttle
opening at the idle position.
IDLE ADJUSTMENT
1. Start engine and allow it to run at high idle until
warm.
2. Turn the idle speed screw clockwise until drill
bit begins to move.
3. Turn idle screw counterclockwise 1 and 1/2 to 2
turn or until the drill bit stops (2700 to 3300
r/min).
Idle speed adjustment screw
REPLACEMENT OF CHUCK
Replacement of chuck should be done in the
following manner:
1. Remove bolt with hexagonal hole fixed in the
driving axle.
2. Insert accessory hexagonal bar (Part Number
895412-20960) into chuck and fix.
3. Fit 19 mm spanner onto driving axle and keep
it fitted.
4. Fit 10 mm box spanner onto the hexagonal bar
and turn it into direction as indicated by an
arrow to remove chuck.
5. Fit a new chuck in the reversed order of
removing.
NOTE
When there is some trouble with the carburetor,
contact your dealer.
High Altitude Operation
This engine has been factory adjusted to maintain
satisfactory starting, emission, and durability
performance up to 1100 feet above sea level (ASL)
(96.0 kPa). To maintain proper engine operation
and emission compliance above 1100 feet ASL the
carburetor may need to be adjusted by an
authorized ECHO service dealer.
IMPORTANT
If the engine is adjusted for operation above
1100 feet ASL, the carburetor must be
readjusted when operating the engine below
1100 feet ASL, otherwise severe engine damage
may result.
Hexagonal bar
(Part Number 895412-20960)
Spanner (19 mm)Box spanner
(10 mm)