Adjusting The Fuel Level - Yamaha YFM660FP Service Manual

CARBURETOR
●
If either is worn, replace them both.
●
If both are fine, adjust the float height by
bending the float tang 1 on the float.
●
Recheck the float height.
*****************************************************

ADJUSTING THE FUEL LEVEL

1.Measure:
Fuel level a
●
Out of specification → Adjust.
Fuel level:
4.5 mm (0.18 in)
Above the float chamber mating
surface
*****************************************************
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 bend-
ing the float tang 4 slightly.
●
Install the carburetor.
●
Recheck the fuel level.
*****************************************************
6 - 7
CARB