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10 

FLOAT LEVEL CHECK AND ADJUSTMENT: 

 

Float adjustments are set at the factory, but variations in fuel pressure could cause a change in these settings.  The following 

procedure shows how to make these adjustments: 

 

1.  Start the vehicle. 

 

2.  Remove the fuel bowl sight plug. 

 

3.  Observe the sight plug hole for the fuel level.  If none is seen, the level is too low.  Fuel should be even with the bottom of 

the sight plug hole.  If fuel comes pouring out of the sight hole, the float is set too high. 

 

NOTE:

  A properly set float level will have the fuel level located at the bottom edge of the sight hole, as shown by the line in 

Figure 12. 

 

 

Figure 12 

 

4.  To adjust, shut down the engine. 

 

5.  Loosen the lock screw on top of the fuel bowl just enough to allow you to turn the adjusting nut.  Hold the screw in position 

with the screwdriver. 

 

6.  Using a 5/8” wrench, turn the adjusting nut in the appropriate direction:  Clockwise to lower float and counterclockwise to 

raise float. 

 

7.  Turn the adjusting nut in increments of 1/4 of a rotation. 

 

8.  Retighten the lock screw. 

 

9.  Restart the vehicle and observe the sight plug hole. 

 

10.  Repeat steps 1 through 8, as necessary. 

Содержание 0-4412C

Страница 1: ...AL 199R7950 7 NOTE These instructions must be read and fully understood before beginning installation If this manual is not fully understood installation should not be attempted Failure to follow thes...

Страница 2: ...3 INSTALLATION NOTES 4 CHRYSLER APPLICATIONS 4 FORD APPLICATIONS 4 GM APPLICATIONS 5 INSTALLATION 5 CHOKE ADJUSTMENT 8 IDLE MIXTURE NEEDLES 9 FLOAT LEVEL CHECK AND ADJUSTMENT 10 JETTING MAIN JETS 11 P...

Страница 3: ...ansmission damage WILL result This carburetor is not designed to work with ANY other automatic overdrive transmission REMOVAL 1 Remove the air cleaner exercising care to detach any vacuum lines from t...

Страница 4: ...Figure 1 Chrysler applications FORD APPLICATIONS WARNING This carburetor is not designed for use with any Ford automatic overdrive transmission SEVERE transmission damage may result from improper appl...

Страница 5: ...similar locations on the Holley throttle lever If the original throttle cable is too large a new throttle ball or stud is needed Holley P N 20 2 or 20 38 INSTALLATION 1 Install the carburetor mountin...

Страница 6: ...e that you are reaching full throttle Many performance problems are traced to partial throttle openings from improperly adjusted linkage Figure 6 6 Reconnect the appropriate vacuum hoses to the carbur...

Страница 7: ...ld be blown clean with compressed air at 6 000 miles and replaced at 12 000 miles to assure maximum protection Now would be the perfect time to upgrade to a Holley Powershot air filter Holley P N 120...

Страница 8: ...s tightening of fittings hose replacement and retorquing of the fuel system component flange nuts Periodically check the torque on the fuel bowl screws to 25 30 in lbs to assure proper fuel metering G...

Страница 9: ...e idle mixture is set it may be necessary to go back and reset the idle speed using the curb idle speed screw as shown in Figure 11 4 If a vacuum gauge is not available use a tachometer to obtain the...

Страница 10: ...t is set too high NOTE A properly set float level will have the fuel level located at the bottom edge of the sight hole as shown by the line in Figure 12 Figure 12 4 To adjust shut down the engine 5 L...

Страница 11: ...umber stamped on a power valve such as 65 indicates the manifold vacuum below which the power valve is operational In this case all manifold vacuums below 6 5 Hg the power valve is operating Generally...

Страница 12: ...s Inc 1801 Russellville Rd Bowling Green KY 42101 1 866 GOHOLLEY Technical Service 1 270 781 9741 Fax 1 270 781 9772 Website www holley com 1999 Holley Performance Products Inc All rights reserved 199...

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