Arctic Cat ZR 120 Service Manual page 31

4. Remove the float pin (D) securing the float (E) to
the carburetor body; then remove the float and
needle jet assembly (F).
5. Remove the main jet (G) and the nozzle (H) from
the carburetor tower.
CLEANING
CAUTION
DO NOT place any non-metallic components in parts-
cleaning solvent or carburetor cleaner because dam-
age or deterioration will result.
1. Place all metallic components in a wire basket and
submerge in carburetor cleaner.
2. Soak for approximately 30 minutes; then rinse
with fresh parts-cleaning solvent.
3. Wash all non-metallic components with soap and
water. Rinse thoroughly.
4. Dry all components with compressed air only
making sure all holes, orifices, and channels are
unobstructed.
5. Blow compressed air through all hoses to remove
any obstructions.
! WARNING
Always wear safety glasses when drying components
with compressed air.
CAUTION
DO NOT use wire or small drill bits to clean carburetor
orifices, holes, or channels. Distorted or damaged ori-
fices, holes, or channels can result in poor carburetor
operation.
INSPECTING
1. Inspect the mixing body and jet orifices for cracks,
nicks, stripped threads, and any other imperfec-
tions in the casting.
2. Inspect the float for perforations or damage.
3. Inspect the gaskets for distortion, tears, or notice-
able damage.
4. When applicable, inspect the idle fuel adjuster
screw, needle jet assembly, and pilot jet for wear,
damage, or distortion.
5. Inspect the nozzle and main jet for obstructions or
damage.
6. Inspect the carburetor insulator for damage,
cracks, and tightness.
CAUTION
An air leak between the carburetor and engine will
cause a lean condition and poor engine performance.
28
7. Place the carburetor insulator on a surface plate
covered with #400 grit wet-or-dry sandpaper.
Move the insulator over the surface plate using a
figure eight motion. The motion should produce
an even wear pattern over the entire sealing area.
CAUTION
Water or parts-cleaning solvent must be used in con-
junction with the wet-or-dry sandpaper or damage to
the sealing surfaces may result.
8. Inspect the condition of the throttle return spring.
CHECKING FLOAT HEIGHT
1. Remove the cap screw securing the float chamber;
then remove the float chamber from the carburetor
and account for the rubber gasket.
2. With the carburetor in an upside-down position,
lift the float so the tip of the float lightly contacts
the float arm; then measure the float height from
the body of the carburetor and under-side of the
float. Measurement should be 0.63".
CAUTION
Do not bend the float in an attempt to adjust the
height. Correct float height is obtained by replacing
the needle jet assembly and/or the float.
A739
IO108