Secondary Lockout Adjustment; Float Level Measurement; Idle Speed And Mixture Adjustment - Jeep J-10 Series 1982 Technical & Service Manual

1J-28 FUEL SYSTEMS
(2) Close choke valve completely and set magnet
squarely on top of it.
(3) Rotate bubble until it is centered.
(4) Rotate degree scale to position specified degree
mark (refer to Specifications) opposite pointer.
(5) Hold primary throttle valve wide open.
DEGREE
SCALE
POINTER
MAGNET
LEVELING
BUBBLE
(CENTERED)
INTERMEDIATE
CHOKE LEVER
PRIMARY
THROTTLE LEVER
SPECIFIED ANGLE
(SEE SPECS.)
90722
Fig. U-56 Model 2SE Carburetor-Choke Unloader Adjsitmeot
NOTE: If engine is warm it may be necessary to hold
choke valve closed with a rubber band.
(6) Bend throttle lever tang with Bending Tool J-
9789-111 until bubble is centered.
(7) Remove gauge.
Secondary Lockout Adjustment
Refer to figure 1J-57.
(1) Hold choke valve wide open with intermediate
choke lever.
(2) Open throttle lever until end of secondary ac
tuating lever is opposite toe of lockout lever.
(3) Measure clearance (refer to Specifications) be
tween toe of lockoutlever and secondaryactuating lever.
(4) If adjustment is necessary, bend lockout lever
tang contacting fast idle cam with Bending Tool J-9789-
111.
Float Level Measurement
NOTE: Thefloat level should bedetermined before dis
assembling a carburetor for overhaul if a malfunction
ingfloat is suspected ofaffecting engine performance.
NOTE: The fuel level in the carburetor bowl can be
affected byfuel pumppressureas well as byan improp
erly adjusted float.
To determine if the float requires adjustment, meas
ure the float level according to the following procedure.
(1) Remove vent stack screws and vent stack.
(2) Remove air horn screw located adjacent to vent
stack.
INTERMEIOATE
CHOKE LEVER
GAUGE
CLEARANCE
LOCKOUT LEVER
TANG TO FAST IDLE CAM
SECONDARY ACTUATING
LEVER
90723
Rg. U-57 Model 2SE Carburetor—Seconder! lockout AdJostBtst
WARNING: Use extreme caution when engine is oper
ating. Do not stand in direct line with fan. Do not put
hands near pulleys, belts or fan. Do not wear hose
clothing.
(3) With engine at idle speed and choke valve com
pletely open, carefully insert float gauge in air horn
screw hole and vent hole. Allow gauge to rest freely on
float.
NOTE: Use Gauge J-9789-138 (blue) for model 2SE
carburetor.
CAUTION: Do not press down on gauge because en
gine may flood or float may be damaged.
(4) With gauge at eye level observe mark on gauge
that aligns with top of casting at vent hole. Float level
should be within ± 1.5 mm (± 0.06 inch) of float level
specification. Refer to Specifications.
(5) Remove float gauge.
(6) If float level is not within specification, remove
carburetor air horn and adjust float level. Refer to Float
Level Adjustment.
(7) If float level is within specification, install air
horn screw, vent stack and vent stack screws.
Idle Speed and Mixture Adjustment
The engine and related systems must be operating
normally before performing curb (slow) idle speed ad
justment. Idle mixture adjustment should not be neces
sary unless, during carburetor overhaul, the mixture
screw position was altered.
Precautions and General Information
• Set the parking brake firmly and do not accelerate
the engine.
• Ensure the engine is at normal operating temper
ature before adjusting idle speed and mixture.
• Perform adjustment procedures with the air cleaner
installed, or with air cleaner removed and associated
vacuum hoses plugged. Choke must be open and
deceleration valve supply hose plugged.