Adjusting The Fuel Level - Yamaha YFM400FAR Service Manual

CARBURETOR
G
If either is worn, replace them both.
G
If both are fine, adjust the float height by
bending the float tang 1 on the float.
G
Recheck the float height.
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ADJUSTING THE FUEL LEVEL

1.Measure:
Fuel level a
G
Out of specification → Adjust.
Fuel level:
4.0 ~ 5.0 mm (0.16 ~ 0.20 in)
Above the float chamber mating
surface
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Measurement and adjustment steps:
G
Place the machine on a level surface.
Connect the fuel level gauge 1 to the drain
G
pipe 2.
Fuel level gauge:
P/N. YM-01312-A, 90890-01312
Loosen the drain screw 3.
G
G
Hold the gauge vertically next to the float
chamber line.
Measure the fuel level a with the gauge.
G
G
If the fuel level is incorrect, adjust the fuel
level.
G
Remove the carburetor.
G
Check the valve seat and needle valve.
G
If either is worn, replace them both.
G
If both are fine, adjust the float level by
bending the float tang 4 slightly.
G
Install the carburetor.
G
Recheck the fuel level.
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