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Tractor Talk Discussion Forum

8n tractor

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Huston

05-11-2005 10:31:15




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My 8n just isn't running very good. Idle's fairly well, but when I give it the juice, it acts like it isn't getting enough fuel. Thought about spark plug wires, but when I pull on the choke, it runs smooth. Thinking I may have a carb problem. Any advice?




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old

05-11-2005 11:34:51




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 Re: 8n tractor in reply to Huston, 05-11-2005 10:31:15  
If you do what Gerald says to do and the problem isn't fixed them you will need to rebuild the carb. You may have a fuel flow problem as Gerald says or you may have a carb problem. I'd start as he said and then go to the carb next if you have to



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Gerald J.

05-11-2005 10:44:45




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 Re: 8n tractor in reply to Huston, 05-11-2005 10:31:15  
Standard problem. Fuel flow restriction, probably from an accumulation of varnish and dirt, can be any where in the fuel supply lines from the screen in the gas tank, the sediment bowl, the lines, the carburetor inlet screen (I've seen that plugged so tight I couldn't detect it passing 60 psi air), gas tank cap (though that one is usually delayed), or float needle and seat. Can also be power passages in the carburetor body plugged with the same stuff.

The first check is to pull the drain plug from the float bowl. You should get a splash, then a continuous flow nearly as fat as a pencil. Your symptoms are that you will get a fast drip, not a stream. Take the lines apart until you find the restriction and there can be several.

Gerald J.

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