FUEL SYSTEM
CARBURETOR
25/30 MODELS
Remove manual primer fuel nipple, gasket and
high-speed orifice from
float chamber using Ori-
fice Driver, PIN 317002.
Remove intermediate air bleed orifice.
Remove the screws,
float chamber and gasket.
Remove hinge pin and
float
Remove inlet valve assembly.
Remove nozzle well gasket.
Remove
slow-speed needle and spring.
Remove four screws and carburetor body cover
with gasket.
5
1. Fuel nipple, gasket and high-speed orifice
2. Intermediate air bleed orifice
3. Float chamber and gasket
4.
Hinge pin and float
5. Inlet valve assembly
6. Nozzle well gasket
7. Slow-speed needle and spring
8. Carburetor body cover and gasket
3
1
DR4808
Refer to Carburetor Assembly, Cleaning and
Inspection.
154
Cleaning and Inspection
IMPORTANT:
Do
not clean carburetor or its
components by submerging
in
strong carburetor
cleaner or hot soaking tank. Strong cleaners might
damage components or remove sealing com-
pounds.
Before inspection,
all carburetor components
must
be
thoroughly clean.
• Carburetor must
be
completely disassembled.
• Clean parts with Carburetor and Choke
Cleaner.
• Use a clean bristle brush to remove gum or var-
nish deposits.
• Blow dry with shop air of not more than 25 psi
(172 kPa). When drying passages, direct the
flow of shop air opposite to the direction of fuel
flow.
Float Valve Assembly
Inspect the inlet needle and float valve seat.
• Check the inlet needle tip for grooves, nicks,
scratches, or distortion.
• Check the float valve seat for nicks, scratches,
or distortion.
• Check the float for signs of oil or gasoline satu-
ration.
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