Farmall 400 Help Please!

Ed Haley · Nov 21, 2010

Have a 55 400 that will idle just fine, but when we pull out the throttle, it runs very rough and kind of stumbles around a bit. Almost sounds like it is reaching for more fuel.It has plenty of fuel flow, lines are clean, carb is clean, floats good and set at right height .Cap rotor wires plugs points and condensor are new.If i close the choke it runs fine, adjusting the load limit screw didnt do anything but if i open the choke i can remove the load limit adjusting screw completely and as long as im better then half throttle it runs perfect,obviously when i close the throttle the fuel pours out, If i put my finger over the hole the tractor will miss out again.I have no idea what to look for .Any suggestions would be appreciated thanks in advance Ed

Allan in NE · Nov 21, 2010

Pull the loadscrew out and give 'er a shot of compressed air. Something is blocking that hi side circuit.

Allan

teddy52food · Nov 21, 2010

But do it carefully. It is a good way to collapse the float.

Charlie M · Nov 21, 2010

I'd take a look at the manifold for leaks or a loose connections. I had the same problem with my H once and the manifold had loosen up after having it off.

Farmall 400 Help Please!

Ed Haley

New User

Allan in NE

Well-known Member

teddy52food

Well-known Member

Charlie M

Well-known Member

Similar threads