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140 sometimes runs rough

Farmall Super A, AV, 100, 130, & 140 1939 - 1973
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septemberfarm
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Zip Code: 02081

140 sometimes runs rough

Postby septemberfarm » Mon May 31, 2010 1:31 pm

Does anybody have a suggestion on what might be causing my 1967 IH 140 12 volt positive ground tractor to run great sometimes and then all of a sudden run lousy with no power and an occasional backfire. I just tuned it up , new cap, rotor ,and wires and rebuilt the carb. I also converted the ignition to an electronic ignition, but the problem still occurs.

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Boss Hog
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Re: 140 sometimes runs rough

Postby Boss Hog » Mon May 31, 2010 2:56 pm

It should be 12 volt neg. ground. Most likely an issue with trash in the carb. Is the tank clean ? and does it have a good fuel flow?
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Boss Hog
Power corrupts; absolute power corrupts absolutely byJohn Emerich Edward Dalberg

septemberfarm
10+ Years
10+ Years
Posts: 2
Joined: Mon May 31, 2010 1:17 pm
Zip Code: 02081

Re: 140 sometimes runs rough

Postby septemberfarm » Mon May 31, 2010 4:58 pm

Thanks boss hog, Your right it is a negative ground, and I'll check the strainer on the tank and post the results.

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dgrapes59
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Tractors Owned: 1951 Cub, 2-1955 Loboy w FH, a few plows, discs, mowers, blades, carrier & such
Several '61 CC Originals, Cub Cadet 100, several 102's & 122's, 124, various CC options & implements, #1Trailer, 1963 Springfield, JD 770, Ford 8N
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Location: OH, Trenton

Re: 140 sometimes runs rough

Postby dgrapes59 » Mon May 31, 2010 7:23 pm

Septemberfarm,

Welcome to the forum!
David


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