Carburetor Cleaning; Carburetor Inspection - Polaris Hawkeye Repair Manual

CARBURETOR CLEANING

WARNING
Protect eyes from contact with cleaner. Take appro-
priate safety measures during these procedures.
Safety glasses and chemical resistant gloves are
required. Should you get cleaner in your eyes or if
you swallow cleaner, seek medical attention imme-
diately.
Carburetor cleaners can be extremely caustic. Ex-
tended periods of soaking can loosen the adhesive
sealer on the passage drill-way plugs. Do not soak
rubber or plastic components (such as the vacuum
slide diaphragm, needle seat screen, or O-Rings in
caustic cleaning solutions. Irreparable damage may
occur. Do not use agitator-type carburetor cleaning
equipment. Rubber parts must be cleaned with mild
detergent and hot water only.
1. Thoroughly clean the carburetor body, jets, and all
passages with carburetor cleaner or electrical contact
cleaner.
2. If the carburetor is extremely dirty or contaminated
with fuel residue and varnish, soak for short periods
only in carburetor cleaner, and rinse in hot water.
3. Replace the jets if they have a buildup of fuel residue
or bacterial growth that cannot be removed. Even a
small amount of residue will reduce the flow
characteristics of the jet.
4. Verify all passages and jets are unobstructed by
spraying electrical contact cleaner through the
passages. CAUTION: Do not use wire or welding tip
cleaners as the orifice size may be altered.
5. Use low pressure air to dry carburetor body and all
components.
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CARBURETOR INSPECTION

1. Inspect jet needle and needle jet for wear. Look for
2. Inspect the inlet needle tapered surface for any sign of
FUEL SYSTEM / CARBURETION
discoloration, shiny spots, or an area that looks
different than the rest of the needle. The middle to
upper portion of the needle contacts the needle jet and
is the most likely wear point. If jet needle shows signs
of wear replace both the needle and needle jet to
prevent a rich condition. TIP: A worn needle jet is
difficult to spot. To check, slide a slightly larger new jet
needle into the needle jet and hold it to a light source.
Light will be visible between the needle and needle jet
if it is worn.
Jet Needle
Inspect this
area
wear or damage. Be sure the spring loaded pin is free
moving and returns freely when pushed. The inlet
needle and seat should be pressure tested after
assembly.
Good Condition
Seat
Needle
Needle Jet
Worn, Deposits
Wear areas
4.13