adjusting carb float level 68 F100

Reply Subscribe

Thread Tools

Search this Thread

Jan 9, 2005 | 09:58 PM

karljay

Thread Starter

Cargo Master

Joined: Jul 2000

Posts: 2,281

Likes: 18

From: Northern California

adjusting carb float level 68 F100

I have a 68 F100 390 2 barrel carb. I think it's the 2100, float in front, idel screws in front, acc pump on drivers side front, 2 screws + center hold down stud, manual choke.

The book says the fuel level should be 1/4" from the top of the carb, I can't seem to get to that. It's running very good at 1/2" from the top and if I raise it any more, the float actually hits the top of the carb and floods.

Is the book just wrong?
What's the actual float adjustment on these?

Thanks, KarlJay.

Jan 10, 2005 | 11:09 PM

karljay

Thread Starter

Cargo Master

Joined: Jul 2000

Posts: 2,281

Likes: 18

From: Northern California

Nobody adjusts there floats?????

Jan 11, 2005 | 02:44 PM

qman

Cargo Master

Joined: Sep 2004

Posts: 2,691

Likes: 6

I also have the model 2100 carb. I rebuilt it this past summer and all I did was follow the directions on setting the float. I don't think the 1/2 inch is for fuel level. I think its the top of the float that is to be 1/4 inch from the top when the needle valve is shutting off the fuel flow. That would probably put the fuel level at around 1/2 inch from the top. What really matters is that you have sufficient fuel in the bowl to run the vehicle. I had to take the top off my carb a few times while I was getting my rig running and I don't remember exactly but if I had to guess I'd say that 1/2 inch is about right for having plenty of fuel in the bowl.