Carburetor Adjustment - Shindaiwa M242 Owner's/Operator's Manual

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.
If the engine is adjusted for operation above 1,100 feet ASL, the carburetor must be re-adjusted when operating the
engine below 1,100 feet ASL, otherwise severe engine damage may result.
Every unit is run at the factory and the carburetor is set in compliance with emission regulations. Carburetor adjustments,
other than idle speed, must be performed
Adjusting Engine Idle
Figure 17
14
by an authorized Shindaiwa dealer.
The engine must return to idle speed
whenever the throttle lever is released.
Idle speed is adjustable, and must be set
low enough to permit the engine clutch
to disengage the cutting attachment.
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
Idle Adjusting
inspection.
Screw
IMPORTANT!
NOTE:
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 en-
gine is at idle, reduce the idle speed
by turning the idle adjustment screw
counter-clockwise. See Figure 17.
3. If a tachometer is available, adjust
idle. Check Specifications page for
correct idle speed
NOTE:
Carburetor fuel mixture adjustments are
preset at factory and cannot be serviced in
the field.