F 250 4WD Pickup V8-460 7.5L (1984)
Carburetor Float: Adjustments
Fuel Level (Wet)
Fig. 5 Fuel level adjustment
1.
With vehicle resting on a flat surface, operate engine until normal operating temperature is reached.
2.
Remove air cleaner, then operate engine at approximately 1000 rpm for 30 seconds to stabilize fuel level.
3.
Stop engine, then remove sight plug from side of primary carburetor bowl.
4.
Fuel level should be at bottom of sight plug hole. If fuel level is below sight plug hole, raise fuel level. If fuel overflows when plug is removed,
lower fuel level. Never loosen lock screw or nut or attempt to adjust fuel level with sight plug removed or engine running, as this will
create a potential fire hazard.
5.
Adjust fuel level as necessary by loosening lock screw, then turning adjusting nut clockwise to lower fuel level or counterclockwise to raise fuel
level, Fig. 5. Tighten lock screw and install sight plug, using old gasket, then run engine at 1000 RPM for approximately 30 seconds to stabilize
fuel level. Each 1/8 turn of the adjusting nut will change fuel level approximately 1/32 inch.
6.
Stop engine, remove sight plug and recheck fuel level. Repeat step 5 until fuel level is at bottom of sight plug hole, then reinstall sight plug using a
new gasket.
7.
Perform steps 3 through 6 for secondary fuel bowl. To stabilize fuel level in the secondary fuel bowl, the secondary throttle must be used.
