TRACTOR PARTS Allis Chalmers Case & David Brown Farmall & International Ferguson Ford & New Holland John Deere Massey Ferguson Massey Harris Minneapolis Moline Oliver & Cockshutt Kubota / Yanmar

TRACTOR MANUALS

Allis Chalmers	Case	Farmall IH	Ford 8N,9N,2N	Ford
Ferguson	John Deere	Massey Ferguson	Minn. Moline	Oliver

Attention Forum Users: On the 28th of December 2023 at 9:00am Central Time, we will be taking the forums down for maintenance while we prepare the new forums for your use. Please click here for more information.

Discussion Forum

12Volt coil on a 6Volt system...

Welcome Guest, Log in or Register

Author

EDDIE8N

04-26-2003 18:18:01

Report to Moderator

I was working on my Jubilee today. Putting it back together after a split to fix Sherman tranny seal. Replacing/fixing several things as I go. Coil was loose in the holder, so I removed it to turn mounting bracket around. Stamped on the side of coil is "12V".
This is on a 6 volt system and it runs fine.
Is there any reason to change this back to a 6 volt coil?
By the way, this tractor was set up 6 Volt negative ground when I bought it. Another thing I am fixing is going back to positive ground.
Thanks, EDDIE8N

[Log in to Reply] [No Email]

Dell (WA)

04-26-2003 19:55:57

Report to Moderator

Re: 12Volt coil on a 6Volt system... in reply to EDDIE8N, 04-26-2003 18:18:01

Eddie..... ..Ford/New Holland is now selling a 1-size fitts all roundcan ignition coil labeled 12 volts. But what they don't tell you is the coil is really a 8 volt coil with high output sparkies and is designed to be used in 12 volt tractors that already had a 12 to 8 volt converting resistor by-pass scheme for eazier starting.

Bottom line, 6 volts on an 8 volt high output coil is gonna give you enuff regular sparkies that you won't know the difference on a good 6 volt engine.

If it bothers you, you could consider a real 6 volt coil from Volkswaggon. Infact they even have a real 6 volt high output "hot-rod" coil called a "Blue Coil" made by Bosch for 6 volts. You're on your own to fit it.

All it takes to change from negative to positive ground is re-wiring the battery and then re-polarizing the genny.

ALSO make certain the polarity of your ignition coil matches your battery polarity. You can loose upto 30% of your sparkies with incorrect polarity. General rule for sparkie coil polarity is (+) to (+). That means the coil (+) is connected to battery (+) thru the ignition points which are at "positive ground". 6 or 12 volts, same rule..... ...Dell

[Log in to Reply] [No Email]

EDDIE8N

04-27-2003 05:24:04

Report to Moderator

Re: Re: 12Volt coil on a 6Volt system... in reply to Dell (WA), 04-26-2003 19:55:57

Dell,
12 volt/8 volt Ford coil would explain why it also says "use with external resistor".
Thanks for the info.
Also, your getting a little slow at your mind-readin'--- I read your post from the previous day about which side of coil goes to distributor in 6V positive. Matter of fact ,I was out in the garage hooking it up about the same time you were posting! (grin)
THANKS,
EDDIE8N

[Log in to Reply] [No Email]

Ron Wi.

04-26-2003 18:27:46

Report to Moderator

Re: 12Volt coil on a 6Volt system... in reply to EDDIE8N, 04-26-2003 18:18:01

Running a 12 volt coil on a 6 volt system is OK But don't run a 6 volt coil on a 12 volt system because it will overheat the coil.

[Log in to Reply] [No Email]

[Options] [Printer Friendly] [Posting Help] [Return to Forum] [Log in to Reply]

TRACTOR PARTS	TRACTOR MANUALS

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 ]

Home | Forums

Copyright © 1997-2023 Yesterday's Tractor Co.
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.

Yesterday's Tractors - Antique Tractor Headquarters

Website Accessibility Policy