Farm Equipment - WC spark plugs

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WC spark plugs

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=203874
Printed Date: 22 Nov 2024 at 1:20pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: WC spark plugs

Posted By: Mark.Kuehn
Subject: WC spark plugs
Date Posted: 28 Oct 2024 at 5:16pm

I'm attempting to find modern replacements for AN7 or AC45 plugs.

I read that Champion J8C is possibly an equivalent and so is NGK CS3. Is this true, and what have others used successfully?

If the plug is a match for depth (length), diameter, and thread is there a risk of using an equivalent plug?

Replies:

Posted By: JoeM(GA)
Date Posted: 28 Oct 2024 at 5:32pm

I run Autolite 295’s in my WC

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Allis Express North Georgia
41 WC,48 UC Cane,7-G's,
Ford 345C TLB

Posted By: PaulB
Date Posted: 28 Oct 2024 at 6:12pm

The NGK equivalent for an AC45 is a B6S non resistor, if you want a resistor plug use a BR6S.

Back in the 70s I quit using Champion plugs for anything. In a box of 10 you could be sure 2 were bad, it was up to you to find those 2.

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If it was fun to pull in LOW gear, I could have a John Deere.
Real pullers don't have speed limits.
If you can't make it GO... make it SHINY

Posted By: Steve in NJ
Date Posted: 28 Oct 2024 at 6:47pm

Autolites or NGK's are usually the strong picks for AC Tractors. Autolite 295's are a warmer plug. The other Autolite choice that can be used is the 303. These are a little colder plug. Worn engines or engines that have some time on them where oil control may be a little bit of a problem, the 295's work great. The NGK B6S work great also. The choice is yours...

Steve@B&B

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39'RC, 43'WC, 48'B, 49'G, 50'WF, 65 Big 10, 67'B-110, 75'716H, 2-620's, & a Motorhead wife

Posted By: Alberta Phil
Date Posted: 29 Oct 2024 at 10:33am

Your WC should have a magneto unless it's been replaced with a distributor. Magnetos don't like resistor plugs or carbon core wires!