Question about John Deere 420,1020,2010,2020,2510,2520 Tractor Float

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I have a John Deere 400 tractor (1978) that won't start. The fuel line is dry. I was able to draw fuel to it with suction to prime it and have also used started fluid but am wondering whether there is something to try before replacing the fuel pump.

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You will need to also determine if the problem is a lack of spark . Remove the spark plug, reconnect the wire and lay it against the engine head. Pull the engine over and watch for good hot spark at the plug's electrode.

If good, then try to start it while squirting fuel or starting fluid into the carb intake. If it starts and you can keep it running by adding fuel, then the carb most likely has dirt, debris or gummed fuel inside.
You will need to remove the carb, disassemble it, clean all the small internal openings and blow it out with compressed air. Probe each and every hole with a small wire. A carb rebuild kit wouldn't hurt either. if all is fine then just replace the fuel pump.

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Kevin


Posted on Jun 21, 2009

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JD 400 Garden tractors were made from 1975 - 1983.
Serial Numbers
1975: 30001
1976: 55001
1977: 70001
1978: 80001
1979: 95001
1980: 120001
1981: 155001
1982: 190001

Go to this site and you may be able to track it down.
John Deere 400 attachments
http://www.tractordata.com/lawn-tractors/000/0/4/41-john-deere-400-attachments.html

Be sure to read this discussion on serial numbers.

Tractor serial numbers

"Find the REAL serial number
There are usually a lot of different numbers on a tractor. The engine, front axle, and cab may all have their own serial numbers. Various components may have parts or casting numbers. Make sure you have actually found the tractor serial number, and not one of these other numbers."

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