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Ford Tractors Discussion Forum

runs out of gas in carb

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Author  [Modern View]

12-12-2016 16:41:57

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I have a ford 800 with a marvel carb. my problem is that I had a friend boil the carb out and install a rebuild kit.
I can start the tractor and it runs good at idle fir one minute then starves out. if I wait a couple of minute it starts up and runs for two minutes and starves out. I wait a couple minutes more and it starts and runs for two minutes.

The sight bowl remains full of gas but it seems like it gets to the carb to slowly.
could the bolt that holds the sight bowl to the carb be the restriction or do you think the float is not at the correct level.

what is your opinion of what I should do first?

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james hill

12-14-2016 17:23:36

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 Re: runs out of gas in carb in reply to GUISSEPPI, 12-12-2016 16:41:57  
Disconnect fuel line from carb, see if flow is good, do this after you pull the drain plug on the carb for the same inspection, this will help narrow it between the carb or the fuel tank/fuel line

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12-12-2016 20:48:55

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 Re: runs out of gas in carb in reply to GUISSEPPI, 12-12-2016 16:41:57  
Start by pulling the carb drain plug. Make sure you have a good steady flow of gas at the drain plug that will fill a pint jar in under 3 minutes. If it does not do that work your way back at each fitting till you find where it slows down. Most any place can have a clog which will cause that be it at he sediment bowl screen or the plastic line going bad or even rust/dirt in the carb

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12-12-2016 20:38:17

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 Re: runs out of gas in carb in reply to GUISSEPPI, 12-12-2016 16:41:57  

The fuel may be reacting with the float valve and making it stick shut.

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12-12-2016 18:02:02

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 Re: runs out of gas in carb in reply to GUISSEPPI, 12-12-2016 16:41:57  
To add to what big jt said. There may be something in the tank that is plugging the inlet to the sediment bowl. Spider, leaf, chaff, cottonwood seeds, etc. Or some rust flakes. I had a 2000 that would sometimes just quit. I could wait ten minutes and it would be fine or quit again. It was never consistent. Could go for months with no issues. Nothing showing in the tank so I took off the bowl and took it apart. There was a piece of dead leaf rolled and stuck in the inlet passage.

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big jt

12-12-2016 17:02:40

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 Re: runs out of gas in carb in reply to GUISSEPPI, 12-12-2016 16:41:57  
The sediment bowl is just that. A place for dirt, water, etc to settle out and not go into the carb. It won't run dry, just collect stuff that is heavier than fuel.

First make sure your fuel valve is open. Next I would open the drain valve on the bottom of the carb, if there isn't a valve on the bottom of the carb you should have a plug likely with a hex head. With this open and the fuel on you should have a steady stream of fuel. If flow is slow start unhooking fittings starting near the carb and working your way back to the tank. Once you get good flow you have found the culprit and can either clean or replace as needed.

Do you have a inline filter? Also there should be a screen in the sediment bowl that can also be a problem.



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