I've installed a new Ignitor coil #40611 for my 12v system. Several years ago I was having cutting-out problems on my White/Oliver/Cockshutt 2-44LL 12v TLB and I went through 3 coils in one summer. Two of those coils were new ones made in China. Poor quality and vibration killed the coils so I upgraded to a Pertronix Electronic Ignition with the Epoxy-filled coil (#40611) and I've not had one problem since.
If you notice in the attached photo on Pertronix coils you'll see that the difference between a 6v coil (#40111) and the 12v coil (#40611) is the 'turn ratio' of 115:1 vs 73:1, and so this means that since the volume of the coil is constant, the way to alter the internal resistance is to alter the number of windings on either the Primary or the Secondary side. By altering the windings you alter the amount of metal in there, hence the resistance. So there really is no such thing as a seperate "Internal Resistor" inside these coils, however, the gauge of wire used could also be altered.
From this chart, coil #40111 can be used on a 12v 8-cyl motor OR a 6v 4-cyl motor
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 - Tuning-Up Your Tractor: Plugs & Compression Testing - by Curtis Von Fange. The engine seems to run rough. In the exhaust you can hear an occasion 'poofing' sound like somethings not firing on all cylinders. Under loaded conditions the tractor seems to lack power and it belches black smoke out of the exhaust. For some reason it just doesn't want to start up without cranking and cranking the starter. All these conditions can be signals that your unit is in need of a tune up. Ok, so what is involved in a tune up? You say, swap plugs and file the points....now tha
... [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.
