[AJD] JD 70 running rough

[Ronald L. Cook]

John has mentioned all the things to look at.  I also think you have 
ignition related problems.  For whatever reason, when my dad's 2 
cylinder tractors did that, he always just changed the condensor.  Quick 
fix out in the field.  I am pretty sure that the condensors were not 
bad, just the act of changing it out would have a tendency to clean up 
connections and I am also sure the gap, etc. on the points was reset at 
the same time.  Using the match book cover for a feeler gauge probably 
cleaned a little corrosion off the points.

Ron Cook
Salix, IA

Troy Bogdan wrote:
> Thanks John,
> I was thinking along those lines.  I already looked under the dist. cap, and 
> there was a little bit of carbon, but I didn't clean and re-gap yet.
> I'll probably try that.  Otherwise, gas is fresh, and the carb was re-built 
> a few years ago.  Thanks for the help,  Troy
> 
> ----- Original Message ----- 
> From: "John" <jmn50 at msn.com>
> To: "Antique John Deere mailing list" 
> <antique-johndeere at lists.antique-tractor.com>
> Sent: Thursday, June 14, 2007 5:50 PM
> Subject: Re: [AJD] JD 70 running rough
> 
> 
>> Troy, I might be able to lend electrical/ignition advice but NOT 
>> carburetion
>> on that tractor. First thing I would do is check the ignition points 
>> (under
>> distributor cap) and clean/polish/buff and gap them if they arent in too 
>> bad
>> shape buttttttt replace them and the condensor if they are badly burned or
>> pitted or all carboned up. Make sure the distributor cap is clean n water 
>> n
>> oil n residue n dust free with NO CRACKS and the rotor tip is okay and the
>> lil carbon button at top of the distributor cap. She may just need a 
>> general
>> ignition tune up and a carb adjustment,. make sure the air cleaner bowl is
>> water free also and insure she has fresh clean water free gas .
>>
>>  John T Nordhoff in Indiana
>>
>> ----- Original Message ----- 
>> From: "Troy Bogdan" <tbogdan1 at earthlink.net>
>> To: <antique-johndeere at lists.antique-tractor.com>
>> Sent: Thursday, June 14, 2007 4:55 PM
>> Subject: [AJD] JD 70 running rough
>>
>>
>>> I have a 1953 JD 70, and lately it has been running real rough (especially
>>> under heavy load) and backfiring.  I am only a marginal mechanic.
>>> I put in new spark plugs but it didn't seem to change anything.  What
>>> would be the first thing I should check to try and correct the problem?
>>> THANKS,  Troy