I don't know if the coil was changed with the 12v conversion, but I suspect it was as it was identical to a coil in a 74 GMC truck we had. Still, I did not see a ballast resistor and there was 12v at the coil when the ignition was on, so I picked up one at Autozone and installed it in series with the 12v from the ignition. I filed more on the points and put everything back together, and it started and ran smoothly. I'll have to see if that lasts. I'll see if maybe I need to change the condensers, too. In hindsight, the plug wires got changed as part of the shotgun approach to trying to fix the problem last Spring, and now I wonder if they were resistor wires before. Still, until I changed points it continued to miss then, but it had run well for the previous 20 years.
Thanks for all the helpful comments. Sometimes it is a bit of a mystery working on these 60+ year old machines, especially when they have modifications.
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.