user manual

5-4
CARB
CARBURETORS
EAS00486
CHECKING THE CARBURETORS
The following procedure applies to all of the car-
buretors.
1. Check:
 carburetor body
 float chamber
 jet housing
Cracks/damage  Replace.
2. Check:
 fuel passages
Obstruction  Clean.
a. Wash the carburetor in a petroleum-based
solvent. Do not use any caustic-carburetor-
cleaning solution.
b. Blow out all of the passages and jets with
compressed air.
3. Check:
 float chamber body
Dirt  Clean.
4. Check:
 float chamber rubber gasket
Cracks/damage/wear  Replace.
5. Check:
 float
Damage  Replace.
6. Check:
 needle valve
1
 needle valve seat
2
Damage/obstruction/wear  Replace the
needle valve, needle valve seat and O-ring
as a set.
7. Check:
 O-ring
3
Damage/wear  Replace the needle valve,
needle valve seat and O-ring as a set.
8. Check:
 piston valve
Damage/scratches/wear Replace.
 rubber diaphragm
Cracks/tears  Replace.
9. Check:
 vacuum chamber cover
 piston valve spring
 jet needle holder
Cracks/damage  Replace.