Carburetor Cleaning/Inspection - Arctic Cat Cougar Service Manual

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4. Install the main jet and washer (Figure 16).
5. Install the pilot jet (Figure 15).
6. Install a new float bowl gasket if the old
gasket is damaged. Install the floats.
7. Install the float bowl (Figure 23). Tighten the
attaching screws securely.
8. Slide the spring onto the pilot air screw (idle
mixture needle), then install the screw and spring
in the carburetor body.
9. Turn the pilot air screw (19, Figure 10) in
until it bottoms lightly against the seat, then back
the screw out the same number of turns that were
recorded during disassembly. The approximate
setting is listed in Table 2.
10. Adjust the carburetor, as described in Chap-
ter Three, after installing the carburetors.
Cleaning/Inspection
(All Models)
Most commercial carburetor cleaners will
damage rubber 0-rings, seals and plastic parts.
Be sure that all parts that could be damaged by
the cleaner are. removed before using a harsh
cleaner.
1. Clean the carburetor castings and metal parts
with aerosol solvent and a brush. Spray the aero-
sol solvent on the casting and scrub off any gum
or varnish with a small bristle brush.
2. After cleaning the castings and metal parts,
wash them thoroughly in hot water and soap.
Rinse with clean water and dry thoroughly.
3. Inspect the carburetor body and float bowl.
CAUTION
Do not use wire or a drill bit to clean
carburetor passages or jets. This can
enlarge the passages and change the
carburetor calibration. If a passage or
jet is severely clogged, use a piece of
broom straw to clean it.
4. Use a spray cleaner to remove varnish from
the jets, then blow compressed air through the
jets to dry and make sure that passages are open.
CHAPTER
SIX
5. Inspect the tip of the needle valve for wear or
damage (Figure 24). Replace the valve and nee-
dle seat as a set if they are less than perfect.
NOTE
A damaged or worn needle valve seat
can cause incorrect float level, imparing
peiformance.
6. Inspect the pilot air screw taper for scoring
and replace it if it is less than perfect.
7. Inspect the jets for damage. Replace any jet
that is less than perfect. Make sure replacement
jets are the same size as the originals.
@
CAUTION
The jets must be completely clean. The
residue that builds up on jets is often
nearly clear and shiny. Some small holes
may appear to be clean but may be com-
pletely blocked. Inspect all jets and in-
ternal passages carefully and critically.
Any burring, roughness, abrasion or dis-
I