check valve, jet, and so forth, a search which is
usually held on the floor.
. Have a sufficient quantity of carburetor cleaner
Wear rubber gloves and eye protection
when you use this highly caustic cleaning
Use a small wire basket for dipping the smaller parts
into the cleaner.
When you dip larger parts, use a short piece of wire,
such as an old coat hanger, to hang the parts into the
cleaning solution. Submerge the parts for at least 30
During any disassembly operation, be careful not to
lose or damage any parts. Keep unauthorized people
away from your work area so your parts do not get lost,
misplaced, or walk away. Thoroughly rinse the
carburetor parts with clean water or solvent and
blow-dry them with low-pressure air. Before
reassembly, inspect all parts for wear or damage.
Disassemble the carburetor only as far as
you have to. Normally, it is not necessary to
remove the throttle shaft and its plates or the
choke shaft and its plate.
REPAIR AND REPLACEMENT
Very little actual repair work is performed on
modern carburetors because it is less expensive to
replace the unit than repair it. Most repairs you do on
carburetors will be in the form of parts replacement.
REASSEMBLY AND ADJUSTMENT
When you have finished your final cleaning and
made the necessary repairs, you are ready to reassemble
the carburetor. You do this in reverse sequence; that is,
the last item taken out is the first put back. Look at the
specification sheet for any special instructions, such as
setting the float level and float drop, initial choke setting,
initial idle adjustments, and any linkage adjustments.
Use care in the assembly process.
Carburetor bodies may be made of aluminum,
bronze, iron, or even plastic. Overtorquing may
damage or warp the parts and lead to expensive
repairs or deadlined equipment.
When you reinstall the carburetor on the engine,
check all connections for proper attachment. Some
manufacturers mark, with numbers or letters,
individual connections; others color-code the vacuum
lines. Remember, the incorrect hookup of emissions
control vacuum lines will lead to decreased fuel
economy, increased exhaust emissions, or both.
Unauthorized alteration, disconnection, or
any tampering with emission control devices in
any way is in direct violation with state and
federal law. CESE being shipped to overseas
locations may be modified according to the
manufacturers specifications to meet
operational requirements as directed by CBC,
Port Hueneme, CA, Code 15, COMCBPAC
Equipment Office or COMCBLANT
Detachment, Gulf Port, MS.
To test and adjust todays carburetor properly, an
exhaust gas analyzer is a requirement. Without this
machine, it is impossible to know if you are exceeding
the allowable ppm (parts per million) emissions of the
HC, CO, and C02. There are many different makes of
this machine. The information listed here is only to give
you a basic understanding of the unit.
Follow the directions for the hookup of the
unit exactly. These instructions may come from
the manufacturers operating instructions, or
even special instructions from the under the
hood data plate. Failure to obtain proper hookup
may result in testing equipment or vehicle