Arctic Cat 2016 90 Utility Service Manual page 57

4. Dry all components with compressed air only mak-
ing sure all holes, orifices, and channels are unob-
structed.
5. Inspect the carburetor body for cracks, nicks,
stripped threads, and any other imperfections in the
casting.
6. Inspect float for damage.
7. Inspect gasket, seal, and O-rings for distortion, tears,
or noticeable damage.
8. Inspect tips of the jet needle, pilot screw, and the
needle valve for wear, damage, or distortion.
9. Inspect the slow jet and main jet for obstructions or
damage.
 NOTE: If the slow jet is obstructed, the mixture will
be extremely lean at idle and part-throttle operation.
10. Inspect the choke assembly for wear or damage.
ASSEMBLING
1. Install the slow jet.
CD606
2. Install the main jet by threading it into the jet holder;
then install the jet holder into the carburetor. Tighten
both components securely.
CD604
3. Install the pilot screw with spring and O-ring.
NOTE: A thin application of lightweight oil will

help to seat the O-ring properly.
56
CD608
 NOTE: Turn the pilot screw clockwise until it is
lightly seated; then turn it counterclockwise 1 3/8
turns.
4. Install the idle adjustment screw with the spring.
5. Install the float and needle valve assembly into the
carburetor; then install the float pin.
CD763
 NOTE: Check float arm height by inverting the car-
buretor freeing the float arm; then measure with a
ruler the height when the float arm is in contact with
the needle valve. Float arm height should be 10.2 mm
(0.40 in.). To adjust, bend the actuator arm tab.
CD615
6. Install the float chamber seal.