Fuel Level Adjustment - Yamaha YFM400FWA 2000 5GH3-AE1 Service Manual

CARBURETOR

FUEL LEVEL ADJUSTMENT

1.Measure:
Fuel level a
Out of specification → Adjust.
Fuel level:
2.0 ~ 3.0 mm (0.08 ~ 0.12 in)
Above the float chamber mat-
ing surface
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Fuel level measurement and adjustment
steps:
Place the machine on a level surface.
Connect the fuel level gauge 1 to the
drain pipe 2.
Fuel level gauge:
P/N. YM-01312-A, 90890-01312
Loosen the drain screw 3.
Hold the gauge vertically next to the float
chamber line.
Measure the fuel level a with the gauge.
If the fuel level is incorrect, adjust the fuel
level.
Remove the carburetor.
Inspect the valve seat and needle valve.
If either is worn, replace them both.
If both are fine, adjust the float level by
bending the float tang 4 slightly.
Install the carburetor.
Recheck the fuel level.
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