Jim, that E4A would probably be a bear to convert, not only due to HV path that you address, but since the primary & secondary coils rotate & it appears to me that both sides of the points are isolated from ground and rotate, it isn't going to be easy to connect to the points!
In looking into this (I have one on the bench), I noticed something else interesting that I thought I might get you to comment on. Every other spark is of opposite polarity from the previous spark.
Every few months, it seems that there is a controversy about the advantage/disadvantage of a positive vs negative spark polarity & often compounded by some who mistakenly think spark polarity is tied to POS/NEG battery ground.
Well, with the E4A mag you have both! I have never put much in the +/- argument, beyond better electron emission from a hotter electrode & that would occur not at start up when you need it most, but after a run period.
Apparently IH didn't either since theE4A alternates, every other firing.
The shaft has insulators on the bearings to isolate it from the case, which brings up another question for you.........did this mag installation utilize an insulated coupler to the mating shaft? If not, it would seem that isolation would be lost..........it must have used a phenolic insulated coupler.??
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 - George's Fordson Major - by Anthony West (UK). This is a bit of a technical info to add on to the article about George's Major in the "A Towny Goes Plowing" article. George bought his Major from a an implement sale about 18 years ago for £200.00. There is no known history regarding its origins or what service it had done, but the following work was undertaken by Harold alone to bring it up to show standard. From the engine number, it was found that the major was produced late 19
... [Read Article]
Latest Ad:
Oliver 550 Diesel runs like a watch three point hitch pto engine gone threw about two hundred hours ago nice clean tractor
[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.