Gas 3000 stalling after running for 1/2 hr.

Jim Vogel

Member
I need help with this problem. I have a 74 Ford 3000 gas tractor that runs perfectly for a while and then cuts out, sputters and dies. When it starts to sputter, there are air bubbles coming into the top of the sediment bowl, but the bowl is also full of gas. It also tends to die when facing up hill. I can sometimes keep it running a little longer by pulling out the choke. Spraying starter fluid in the air filter also helps, which tells me its a fuel system problem. I took the carb apart and cleaned it, but it actually looked fine. I'm wondering if the fuel pump may be the problem? Any help appreciated.
 
The moment it starts doing that carefully pull the gas tank cap off and see if that helps. If it does then the gas tank vent is clogged up so it is getting a suction that the gas pump cannot over come. Or if you hear a blow out sound the tank is gettign hot and again the tank vent is clogged up and the pressure in the tank is causing a problem
 
I am dealing with a carb issue on a 3000 also FYI a new factory gas cap is 65.00 this one was bad. It does need to be a vented cap and I could not find one anywhere else. good luck
 

My 3000 has a gas cap that came off a 71 Chevy pickup. Stuck it on 10 years ago when the one that was on it wasn't sealing and fuel was sloshing out.
 
I got your answer and the answer back but not sure you got my answer back. had to change some of my spam filters on my e-mail due to getting over 100 e-mails a day from spammers
 
Explain how you know the cap is ok?? You cannot look at it and know it does not have a problem
 
I think probably you have a bad lift pump or crap in one of the system strainers; probably at the tank. For the purpose of being thorough, I'd pull the coil wire off the cap and ground it when it dies, just to rule out whether or not you have a spark problem. If you have a good fat blue spark, then I would proceed to flow check the fuel system. The pump is engine driven, mounted on the front cover. It's hard to see let alone reach... but given it quits facing up grade I'd wager that is the likely problem.

Rod
 
Similar problem on a MM 445 pulling tractor. Long story short: it had a piece of fuel cap gasket floating around in fuel tank. Every so often it would cover over the fuel supply outlet. Cut off gas supply, stop running. You may have a similar culprit. If you can get the fuel line off at carburetor when it stops: you can tell if there is a blockage. Be quick before it floats away and allows fuel to flow free again.
 
I found out recently that there is a strainer screen in the top of the fuel pump. I had to make a new gasket for mine and when I opened it up you could see the strainer. Easy to clean off and reassemble. You will probably have to make a new gasket if you do this. The old one is likely to flake off due to age.

John
 
As I understand the fuel system (correct me if I am wrong), there is a strainer in the tank. (Mine had become dislodged). There is a strainer in the pump. There is a strainer in the fuel bowl. And U-Dog says that there is a strainer in the fuel inlet to the holley carb.

To establish pump flow, I take off the fuel bowl and crank the engine. IF it is working you will see a intermittent gushing fuel flow out of the fitting. Squirt, squirt, squirt... Try that to see if the fuel flow is being restricted.
 
(quoted from post at 12:48:20 06/21/17) I need help with this problem. I have a 74 Ford 3000 gas tractor that runs perfectly for a while and then cuts out, sputters and dies. When it starts to sputter, there are air bubbles coming into the top of the sediment bowl, but the bowl is also full of gas. It also tends to die when facing up hill. I can sometimes keep it running a little longer by pulling out the choke. Spraying starter fluid in the air filter also helps, which tells me its a fuel system problem. I took the carb apart and cleaned it, but it actually looked fine. I'm wondering if the fuel pump may be the problem? Any help appreciated.

Good afternoon Jim,

My 971 still does this once in a great while. The bubbles in the sediment bowl indicate (to me anyhow), boiling fuel. While the sediment bowl stays full, air passes through (i.e. the bubbles) and starves the carb. My question would be, how does it act after setting for 30 mins or so? Mine would take right off and do great.
After adding a "heat sheild", the nuisance almost never occurs.

Chris
 

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