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stalling 504 farmall

A

Anonymous-0

Well-known Member
504 farmall starts up and after 10 mins stalls?
replaced coil,new points, plugs,condenser, cap and
wirers, rebuilt carb, removed and cleaned gas tank,
in line filter. Still stalls HELP!!!! any ideas?
 
Try removing the cap on the tank. If it isn't breathing and air going into the tank, it could cause the flow to cease. Did you use a quality coil and condenser? As others have said some of this stuff today is junk to begin with.
 
Amen if there was ever a need for quality control it is now.
Try turning gas off at the bowl take plug out of the carburetor put a clean bucket under it to catch the gas turn fuel on and watch the flow if it runs out good for 11 minutes it ain't a fuel problem, poor fuel back into tractor tank and go to the other side with test light crank and check current at distributor and coil until it dies . Good luck
 
How long before it will restart ,it can be vapor lock ,how is fuel line , cut or patched,is it close to exhaust, 1 picture would help but I can't post either,if your line is cut and spliced with rubber try a longer piece and move it away from heat , there was a cub on here the other day that I thought should have burned the line was so close to the exhaust.
 
starts pretty quick with choke out,Line is cut with inline filter,about 8" from man. Thanks for your posts Larry
 
I wasn't suggesting the use of rubber hose ,I think you would have better results from copper or stainless lines ,but they don't come with inline filters so there you go, just make yourself happy .
 
If it starts right back up with choke, it's a fuel problem.

First off, ditch the inline filter. Just humor me for a little while. You can put it back later if it doesn't make a difference.

Most inline filters are either designed for PRESSURIZED fuel systems, or small engines. They won't flow enough fuel to keep a large tractor engine running very long.

What sounds like is happening here is that it is flowing SOME fuel, almost enough to keep the bowl full but not quite. The level in the carburetor bowl slowly drops over 10 minutes, and the tractor dies. After a few seconds the bowl is partially full again, so the tractor will run.
 
Agree with Mk and DG. I had the same problem on my 504. Lose the inline filter and make sure the fuel cap's vent is open
JG
 
removed inline filter,runs some what better still stalling, Now it's overheating going to pull the radiator get cleaned and flushed etc. still thinking vapor lock? thank goodness it not my only tractor Hay is here thank to all for your advice. Larry
 
Unless you wrapped the fuel line several times around the manifold before you connected it to the carburetor, I highly doubt it's vapor lock.

Have you checked fuel flow? With the line disconnected from the carburetor, gas should flow full force out the line, not dribble, not trickle.

The overheating may be a another symptom of the actual problem. Burned valves will cause an engine to suddenly stop running inexplicably. I had a Cub Cadet once that would fire instantly and run fine, but after about 2 minutes, it would just stop running. It would start right back up and run a little more, then quit again. Over and over. Turned out to be a burned exhaust valve.

Burned valves seal well enough until they get warmed up a little, then they don't seal at all. No compression, no run...
 
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