3-32
FUEL SYSTEM
3-32
MODEL 4160 CARBURETOR SYSTEMS (Continued)
CLEANING
Carburetor parts cleaning is covered on page
3-15.
NOTE: Cleaning, proper assembly, the use of
the correct parts, proper torquing of all
screws and correct adjustments are neces-
sary to achieve correct carburetor service.
Primary Metering Body
1. install idle mixture screw gaskets in pas-
sages. Use head of screw to push into
place.
NOTE: Inspect mixture screws. If the tapered
portion is grooved or ridged, a new mixture
screw should be installed to insure ability to
maintain the correct idle mixture. Turn
screws in lightly against their seats. Back
each screw out the exact number of turns re-
corded during disassembly.
2. Install a new gasket on power valve and in-
stall with proper wrench or socket. Torque to
100 in. Ibs.
3. Install main metering jets using proper
screwdriver or jet wrench.
4. Install fuel baffle (if used). Press metering
body and fuel bowl gasket down firmly on
the dowels.
CAUTION: Be sure you are using the correct
metering body gasket and that bowl gasket
is not covering the accelerator pump
passage.
Primary Fuel Bowl
1. Install plastic accelerator pump check valve
in fuel bowl (if used).
2. If ball type, check ball clearance under re-
taining bar is proper.
3. Install pump diaphragm return spring, di-
aphragm and pump cover. Be sure di-
aphragm is centered and contact button is
toward pump lever in cover. Install four at-
taching screws and tighten evenly.
4. Install gasket on fuel inlet seat and install in
fuel bowl.
5. Tighten securely with proper wrench.
6. Install fuel inlet needle.
ACCELERATOR
\PARALLEL
TO BOWL
FLOOR
7. Slide the inlet baffle into the grooves.
8. Install float spring (if used) on float lever and
then install the assembly on the float shaft.
Be sure spring is properly located on fuel
bowl floor. Install the float retainer. Adjust
float parallel to bowl floor. If an adjustmentis
necessary, carefully bend float tang until
proper adjustment has been obtained using
care not to nick or damage portion of tang
which contacts needle.
Secondary Fuel Bowl
Assemble the secondary fuel bowl by follow-
ing Steps 4 through 8 under assembly primary
fuel bowls.
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