float level for F-14 carb

lil mac · Apr 25, 2009

Earlier this week the dicussion was on F-14s hard to start. Comments on the float level was critical. My Shop manual states the fuel level for the float should be 23-25 - 32nds below bottom of upper body. Would appreciate advice on just how you measure from exactly where?

Fawteen · Apr 25, 2009

Both my original owner's manual and my J*nsales manual give the same specification but no clue on how do do it.

Seeing as the upper and lower body surfaces mate (plus the thickness of the gasket) I'd say 23/32 below the mating surface on the top of the lower body would be awfully close.

Problem is, I don't see how the heck you'd know other than put it together, let it fill with fuel, then take it apart and look for the wet line. When you take it apart, the float comes with the top, so the volume displaced by the float will cause the fuel level to be lower than the measurement with the carb together. If you can see the line where the fuel WAS with the carb together, that'd be the clue.

lil mac · Apr 25, 2009

You have discribed my delima exactly. I am not an expert on these things but feel I have a little common sense and the shop manuel makes no sense. Just returned from a tractor pull and the ole F14 run lst and 2nd even though we had to pull it 3-times to get it started.

John M · Apr 25, 2009

I took it as the flat surface of the upper body,since it is the "lowest part" of the upper body and mine did OK, but someone suggested some time back that they run better with and extra gasket on the seat, so I did that and it runs better.

lil mac · Apr 25, 2009

Johm, are you talking about an extra gasket between the carb and manifold or between the two halves of the carb?

John M · Apr 25, 2009

Neither, on the seat for the needle and seat assembly on the top half of the carb, for the float. This lowers the level of the fuel just a tad, similar to just moving the moving down a little, only a little more presice than trying to bend it just a tad. Understand? If not Ill try and find my pics of what I did and show you.

Anonymous-0 · Apr 25, 2009

On any carb if you don't know the exact setting of the float, a good rule of thumb is level. Why would you design a float to set off level? This is by no means perfect, just a good rule of thumb.

JMOR · Apr 25, 2009

You know, .... I don't mean to be a spoil-sport here, but..................when that tractor is out there bouncing all over the place to the point you can hardly stay in the seat, where do you think the carb fuel level is? Don't get carried away grasping at straws over one or two 32nds of an inch! 'taint gonna matter!

If you have a running problem, it is likely somewhere else.

lil mac · Apr 26, 2009

The tractor runs great, just hard and sometimes impossible to start w/crank. Today, 2-half pulls w/choke on and then a half pull upwards w/choke off and it started. That is the way it surpose to start, but when it dosen'tyou better walk away from it for at least 15 minutes (as one reply suggested) because it is not going to start. I will put the new float in at the specs and see what happens.

James Williams · Apr 26, 2009

Remove the plug at the bottom of the carb bowl,screw a barb fitting in the hole with a peice of clear tubing atached to it to determine the fuel level.The fuel level should be half way up in the bowl

jimmy

JMOR · Apr 26, 2009

This is a Ford & apparently runs very well a bit higher, but it shows the concept.

float level for F-14 carb

lil mac

Member

Fawteen

Well-known Member

lil mac

Member

John M

Well-known Member

lil mac

Member

John M

Well-known Member

Anonymous-0

Well-known Member

JMOR

Well-known Member

lil mac

Member

James Williams

Well-known Member

JMOR

Well-known Member

Similar threads