5.10
Section 5
Fuel System and Governor
16.5 mm
(0.65 in.)
Turn Carburetor
Upside Down
Figure 5-7. Governed Idle Spring Location.
Figure 5-8. Holding Throttle Lever Against Idle
Stop Screw (One-Barrel Carburetor).
Carburetor Servicing (CV17-740)
Nikki Carburetors
Float Replacement
If symptoms described in the carburetor
troubleshooting guide indicate float level problems,
remove the carburetor from the engine to check and/or
replace the float. Use a float kit to replace float, pin
and inlet needle or valve.
1. Remove the air cleaner and air intake components
from the carburetor as described in Section 4.
2. Disconnect the fuel inlet line from the carburetor.
3. Disconnect governor/throttle linkage from the
carburetor.
4. Disconnect lead wires from fuel solenoid-
equipped carburetor.
Governed
Idle Spring
Tab
Hold Throttle
Lever Against
Screw
5. Slide the carburetor off the retaining studs.
Remove the fuel bowl retaining screw or fuel
shut-off solenoid and drain the fuel into a safe
container. Remove the bowl from the carburetor
body.
Figure 5-9. Proper Float Level.
6. Turn the carburetor body upside down and check
the float level as shown in Figure 5-9. With the
float needle valve fully seated, 16.5 mm (0.65 in.)
should be measured from the body to the float as
indicated. Don’t attempt to adjust by bending the
tab; replace the float with a kit if the level is
wrong.
7. Pull the float hinge pin and remove the float with
the inlet needle attached to inspect the needle and
seat. If dirty, blow out with compressed air.
Replace the float components as needed with the
kit.
8. Using new gaskets, reinstall the bowl and tighten
the bowl retaining screw or solenoid to
5.1-6.2 N·m (45-55 in. lb.).
9. Reinstall the carburetor on the engine, reconnect
the fuel line, control linkages and air intake
components. Retest operation.
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