1953 Jubilee fuel flow

aseiser

New User
I have a Ford Jubilee and it will run rough after about 10 minutes of operation. Once it sits for a half hour or so, it will run better. I have been checking out the fuel flow. I have disconnected the fuel line from the carburetor and it does not flow consistently. It kind of flows in spurts, is this normal? I have read other posts that say to check fuel flow by taking plug out of the bottom of the carburetor, but I don"t have a plug on the bottom. Is there another way to check flow? I took the bowl/valve assembly off and blew it out and the flow is still the same. Thanks.
 
No, that is not normal. It should have a good, steady flow. Is your gas cap vented? Is there crud floating around in the tank?
 
The carb says zenith on it. There is a needle valve coming out of the front on the bottom. I guess I could remove the whole thing to check flow? I drained the whole tank when I blew out the bowl valve, there was junk in the gas. I have checked the flow with the cap off, so I don't think it is a venting issue. Thanks.
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zenith or not. you need to make sure it is clean and flaots free and needle valve opening to allow fuel in.
 
I wouldn't take that main mix needle out if I were you. I have a zenith on my 8n and that thing is a pain to get set back right. Plus its right next to the exhaust pipe so I always burn my finger tips trying to set it.
 
I replaced the sediment bowl assembly today and drained the tank again. This time I checked the flow of gas at the carb by removing that needle valve assembly. There was consistent flow of gas coming out of the bottom of the carb. I don't know how much flow is enough? Ran the tractor for at least 20 minutes with no problem, but then the same thing happened, spits and sputters and eventually stalls. I check the gas at the carb again and seemed the same. Tractor wouldn't start after it stalled. I let it sit for 15 minutes or so and then it started but still ran rough. I was just able to get it back in the garage. My guess is that it is electrical and not fuel? One other thing I noticed is that when I got it back in the garage, I noticed arcing from the posts on the 12 volt coil. Is this normal? Thanks for your help.
 
arcing from the posts on the coil is not normal. Where exactly is it arcing? Have you checked the coil housing for cracks?
 
I could just see it arcing from each post toward the other post. I
did check for cracks and did not see anything on the coil.
 
You should never have to guees if it is electrical.

always, always check spark FIRST on ANY stall.

when she won't start. check spark.

describe the arcing on the posts.. as in loose wires to the posts.. or snaps of high voltage from the central tower to one of the posts.
 


Definitely not normal. Probably going to need a new coil.

Before you go throwing money at it; check the distributor cap, rotors, wires and plugs for opens and cracks.
If the spark is showing at the contacts of the coil, either the coil is cracked or the spark has no easier path to take through the distributor cap, wires, and plugs to get to ground.

P.S. - Always remember to turn the switch off when you leave the tractor after it has stalled. I've seen lots of coils burnt up that way. Tractor stalls, points are closed, ignition left on, coil burns up.
 

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