Section 03 ENGINE
Sub-Section 08 (CARBURETOR AND FUEL PUMP)
03-08-10
Recheck carburetor synchronization.
PRELIMINARY IDLE SPEED
ADJUSTMENT
Adjust throttle slide height (see table) by turning
idle speed screw
no. 7
.
Final adjustment (engine running at idle speed)
should be within 1/2 turn of idle speed screw from
preliminary adjustment.
TYPICAL
1. Drill bit used as gauge for throttle slide height
IDLE SPEED FINAL ADJUSTMENT
7, Idle Speed Screw
Start engine and allow it to warm then adjust idle
speed to specifications by turning
idle speed
screw clockwise to increase engine speed or
counterclockwise to decrease it.
NOTE:
Turn adjustment screw the same amount
on all carburetors to keep carburetors synchro-
nized.
Refer to TECHNICAL DATA 09-02 for the specifi-
cations.
CHOKE
All Models Except Mach Z/Z LT
Choke Plunger Adjustment
Set choke lever to fully open position.
CHOKE LEVER ā FULLY OPEN POSITION
Insert choke plunger tool into choke air inlet of
each carburetor.
ā
WARNING
This gap is very important. If the throttle
slide rests against the carburetor cover at
full throttle opening, this will create too
much strain and may damage the throttle
cable or other components in throttle mech-
anism.
-
CAUTION
The oil injection pump adjustment must be
checked each time carburetor is adjusted.
Refer to OIL INJECTION SYSTEM 03-05.
Models
Throttle Slide Height
mm (in)
Formula III/III LT 1.2 (.047)
Mach 1 1.4 (.055)
Mach Z/Z LT 1.3 (.051)
A01C3NA
1
-
CAUTION
Do not attempt to set the idle speed by using
the air screw. Severe engine damage can oc-
cur.
A01C5HA
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