Wd45 spark plug confusion
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=148457
Printed Date: 14 Jun 2025 at 2:14am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Wd45 spark plug confusion
Posted By: Nick m
Subject: Wd45 spark plug confusion
Date Posted: 13 Mar 2018 at 4:46pm
| I read a couple places autolite 295's are a good plug for these. It has champion rj12yc in it. The champions don't cross to the autolites. Look to be the same overall length and thread size, but definitely different from the hex down. Probably over thinking again but that's me. This is the one I just bought that's been sitting for 15ish years. |
Replies:
Posted By: dawntreader74
Date Posted: 13 Mar 2018 at 5:12pm
| had best luck with AC-45 or 46' them other plugs are not hot . them lawn mower plugs with cold spark don't work very good in the old tractors if your working it. |
Posted By: Bill_MN
Date Posted: 13 Mar 2018 at 5:32pm
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Forget about those Champions and just put some Autolite 303's in. ------------- 1951 WD #78283, 1918 Case 28x50 Thresher #76738, Case Centennial B 2x16 Plow |
Posted By: Rltool
Date Posted: 13 Mar 2018 at 6:02pm
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I’ve had pretty good luck with the Autolite 295 plugs. I don’t work them that hard either. Ray W. |
Posted By: MACK
Date Posted: 13 Mar 2018 at 10:05pm
| Any thing is better than champion. MACK |
Posted By: dawntreader74
Date Posted: 13 Mar 2018 at 11:14pm
mack ;; you hit it right on the head 
|
Posted By: Sugarmaker
Date Posted: 14 Mar 2018 at 1:01pm
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I also use the 295's and they preform well. I also do not like Champions. I guess its like a Ford or Chevy thing? I drive Fords!:) Regards, Chris ------------- D17 1958 (NFE), WD45 1954 (NFE), WD 1952 (NFE), WD 1950 (WFE), Allis F-40 forklift, Allis CA, Allis D14, Ford Jubilee, Many IH Cub Cadets, 32 Ford Dump, 65 Comet. |
Posted By: mdm1
Date Posted: 14 Mar 2018 at 4:22pm
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I just put a set of NGK B-4 in my B haven't used it much yet. I have 295's in the others. ------------- Everything is impossible until someone does it! WD45-trip loader 1947 c w/woods belly mower, 1939 B, #3 sickle mower 1944 B, 2 1948 G's. Misc other equipment that my wife calls JUNK! |
Posted By: Gerald J.
Date Posted: 14 Mar 2018 at 8:59pm
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For at least a quarter century Champion tractor pugs have been junk. Their choice of ceramic is bad. When it gets a bit of carbon it from full choke starting it doesn't clean from running normally hot and the carbon really hurts the spark and the engine running. Its not Ford vs Chevy, it is simply an inferior product. Gerald J. |
Posted By: old farmer
Date Posted: 14 Mar 2018 at 9:06pm
| Champions have been a problem as far back as late 50s. Uncles disliked them. |
Posted By: Sugarmaker
Date Posted: 15 Mar 2018 at 9:41am
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I think my dad must have had stock in Champion plugs. Thats all he ever used in the Allis WD series and the B. He would buy them a dozen at a time and go through them like water. J-8 is still stuck in my mind! Regards, Chris ------------- D17 1958 (NFE), WD45 1954 (NFE), WD 1952 (NFE), WD 1950 (WFE), Allis F-40 forklift, Allis CA, Allis D14, Ford Jubilee, Many IH Cub Cadets, 32 Ford Dump, 65 Comet. |
Posted By: alan-nj
Date Posted: 15 Mar 2018 at 10:01am
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Bought a CA 18 years ago that had Champions. Finally changed them last year. Worked well for the 17 years I used them........but I haven't ever bought any more Champions. I was using Autolite, but have switched to NGK ------------- If ignorance is bliss, than happy days are here again. |
Posted By: Steve in NJ
Date Posted: 15 Mar 2018 at 10:17am
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Autolite 295's are the hotter plug. 303's are the colder plug. When our customer's ask me about what plugs to use, I tell them either Autolite's or NGK's seem to work quite well in AC Tractor engines. In worn not rebuilt engines, the hotter 295's work quite well. In newer engines or freshly rebuilt engines, the 303's work great, especially with a Battery ignition. Anything with a Mag, the hotter plugs (295) work great. The NGK B6 works great also... Steve@B&B ------------- 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: Butch(OH)
Date Posted: 15 Mar 2018 at 11:09am
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Go to Ebay, punch in AC45 and buy some of the old stock AC45 that abound there. Be careful as there are now reproductions AC45 sold there too. Never heard bad (or good) about the repros buy why take the chance. No they are not $1.50 a piece but if you watch you can get them for $3-4 by the box full. If your head has been changed and you need long reach the number is 45XL and they are much cheaper than 45 to boot. |
Posted By: Butch(OH)
Date Posted: 15 Mar 2018 at 11:14am
Like these https://www.ebay.com/itm/8-Vintage-GM-AC-45-Fire-Ring-Spark-Plugs-J396/282848977777?epid=658263563&hash=item41db1ce371:g:UewAAOSwG1NahPjU&vxp=mtr" rel="nofollow - https://www.ebay.com/itm/8-Vintage-GM-AC-45-Fire-Ring-Spark-Plugs-J396/282848977777?epid=658263563&hash=item41db1ce371:g:UewAAOSwG1NahPjU&vxp=mtr |
Butch(OH) wrote:Posted By: ac45dave
Date Posted: 15 Mar 2018 at 12:16pm
 ------------- 54 wd-45gas ; 56 wd-45d N/F w/fact p/s ; 63 d-17 sIII N/F gas ; 60 D14 N/F ; 67 d-17 sIV N/F gas ; 63D15 sII W/F; 39rc#667 ; 2021 massey 4710 fwa ; gravely 2 wheel tractors |