Posted by ACEd on October 17, 2013 at 08:17:41 from (108.212.166.233):
In Reply to: ztu tune up posted by kermkep on October 12, 2013 at 18:58:54:
Point gap of 0.020 s/b correct for Fairbanks Morse Magneto. What are numbers on Magneto - I think a 44 ZTU original s/b FMK4B4.
That decodes as follows: FM = Fairbanks-Morse; K = basic design (with disc rotor under a one-piece top as opposed to later J or X models that had removable rotors under separate caps); 4 = 4 cyl; B = flange mount or A = base mount; 4 = MM Application with 25 degree preset - other numbers indicate other tractor brands potentially with different Presets. (3 = AC, 7 = Continental, 11 = IH, 73 = Ford 2N?) As I understand it the Preset is essentially a built in fixed advance.
Other magnetos can be and often are swapped in - As I understand it, the later FMJ4B4 or FMX4B4 should be direct interchange for MM with same 25 degree preset. Other mags such as the FMX4B3 built for Allis Chalmers will work but Preset is 30 degrees instead of 25 degrees. The FMX4B3 works fine - I just put one in a ZTS in place of the original FMK4B4. I believe there were other applications which had Presets as low as 15 degrees. Not sure how, but I understand the presets can be changed if you know what you are doing, but not sure I would mess with it.
Why do you say you have timing problems - does it not run good or are you checking with a timing light? If it runs good, I'd leave it alone.
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 - History of the Nuffield Tractor - by Anthony West. The Nuffield tractor story started in early 1945. The British government still reeling from the effects of the war on the economy, approached the Nuffield organization to see if they would design and build an "ALL NEW" British built wheeled tractor, suitable for both British and world farming.
... [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.