Shindaiwa LE254 - Manual (Page 17)

17
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 Operation
This engine has been factory adjusted to maintain satisfactory starting, emission, and durability performance up to 1,100
feet above sea level (ASL) (96.0 kPa). To maintain proper engine operation and emission compliance above 1,100 feet ASL
the carburetor may need to be adjusted by an authorized Shindaiwa service dealer.
NOTE:
Every unit is run at the factory and the carburetor is set in
compliance with emission regulations. Carburetor adjust-
ments, other than idle speed, must be performed by an
authorized Shindaiwa dealer.
IMPORTANT!
If the engine is adjusted for operation above 1,100 feet
ASL, the carburetor must be re-adjusted when operat-
ing the engine below 1,100 feet ASL, otherwise severe
engine damage may result.
Adjusting Engine Idle
The engine must return to idle speed
whenever the throttle trigger is
released. Idle speed is adjustable, and
must be set low enough to permit the
engine clutch to disengage the cutting
attachment.
Idle Speed Adjustment
1. Place the unit on the ground, then
start the engine, and then allow it to
idle 2-3 minutes until warm.
2. If the attachment moves when the
engine is at idle, reduce the idle
speed by turning the idle adjustment
screw counter-clockwise.
3. If a tachometer is available, adjust
idle. Check Specifications page for
correct idle speed.
WARNING!
The cutting attachment
must NEVER move at engine idle!
If the idle speed cannot be adjusted
by the procedure described here,
return the unit to your Shindaiwa
dealer for inspection.
NOTE:
Carburetor fuel mixture adjustments
are preset at factory and cannot be
serviced in the field.
Maintenance (continued)
Idle
Ajust-
ment
Screw