Since youre now at Neg ground, if its not already that way, Id try wiring the coils + to the switched ignition voltage source (switch, ballast etc) and the - to the distributor.
Coils may be labeled "12 volts" or "12 volts NOT for use with external ballast" and that means just what it says, you use 12 volts on it with no external ballast. If a coil is labeled "12 volts for use with (or requires) ballast resistor" again it means just what it says, use a ballast or it will overheat.
Despite what most lay persons and farmer Billy Bob and his beer guzzling know it all brother in law think, most typical old 12 volt tractor coils 1940's to 60's vintage DONT REALLY HAVE A STAND ALONE DISCRETE RESISTOR HIDDEN AWAY INSIDE THE CAN, their LV primary winding resistance in the neighborhood of 2.5 to under 4 ohms (many around 3 ohms) is derived by how much wire is used and/or the resistivity of the wire. Disect or x ray one and I bet you wont find a stand alone conventional resistor tucked in there somewhere!!!!!!! They did make some real early automotive coils that had a seperation (ringed outside) and a seperate compartment where they indeed did have a resistor, but Ive never seen such on any old tractors (40's to 60's ) and I was a used tractor dealer n saw a ton of old tractors n coils.
PS a "good" spark ought to arc 3/16 of an inch and be bright visible blue NOT faint thin wimpy yellow you can hardly see !!!!!!!!!!
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 - Grain Threshing in the Early 40's - by Jerry D. Coleman. How many of you can sit there and say that you have plowed with a mule? Well I would say not many, but maybe a few. This story is about the day my Grandfather Brown (true name) decided along with my parents to purchase a new Ford tractor. It wasn't really new except to us. The year was about 1967 and my father found a good used Ford 601 tractor to use on the farm instead of "Bob", our old mule. Now my grandfather had had this mule since the mid 40's and he was getting some age on him. S
... [Read Article]
Latest Ad:
1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
[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.
