If your tractor already has a ballast resistor use a 6 volt coil.
I think 6 volt coils have 1.5 ohms of resistance across the primary terminals and use a high amp 1.5 ohm ballat resistor. Twelve volt coils have 3 ohm resistance across the primary coils. Measure the resistance of your old coil and buy one with the same resistance.
The advantage of a 6 volt coil and a ballast resistor is most vehicles add a starting circuit for a hotter spark when starting. An extra wire runs from the switched terminal on the starter solenoid to the hot terminal on the coil, (or the coil side of the ballast resistor). When the starter is engaged the extra wire sends full battery voltage to the coil for a hotter spark. Once the starter is disengaged the coils receives 6 volts from the ballast resistor for longer point and coil life.
The starting circuit helps most in cold weather or with a low battery.
If you use a 12 volt coil with a ballast resistor and starter circuit the engine starts well but as soon as the starter is released it runs poorly from lack of spark.
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 ]
Today's Featured Article - Field Modifications (Sins of the Farmer) - by Staff. Picture a new Chevrolet driving down the street without it's grill, right fender and trunk lid. Imagine a crude hole made in the hood to accommodate a new taller air cleaner, the fender wells cut away to make way for larger tires, and half of a sliding glass door used to replace the windshield. Top that off with an old set of '36 Ford headlight shells bolted to the hood. Pretty unlikely for a car... but for a tractor, this is pretty normal. It seems that more often than not they a
... [Read Article]
Latest Ad:
Sell 1958 Hi-Altitude Massey Fergerson tractor, original condition. three point hitch pto engine, Runs well, photos available upon request
[More Ads]
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.