Wd45 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=145466
Printed Date: 21 May 2025 at 1:26pm
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Topic: Wd45 Spark Plugs
Posted By: Allis Wd45
Subject: Wd45 Spark Plugs
Date Posted: 15 Dec 2017 at 12:53am
This is proubley a dumb question. But I moved my wd45 inside tonight and it was popping faintly out the exhaust, and I thought maybe the plugs were fouling. Do these look like it’s running too rich or oil fouled.     
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Replies:
Posted By: Stan IL&TN
Date Posted: 15 Dec 2017 at 7:17am
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If they are dry then it's running rich. If wet then it's oil. ------------- 1957 WD45 dad's first AC 1968 one-seventy 1956 F40 Ferguson |
Posted By: Allis Wd45
Date Posted: 15 Dec 2017 at 9:57am
| There pretty much dry they weren’t soaking wet in oil.Tractor runs fine though and don’t smoke could it still be rich. |
Posted By: Ed (Ont)
Date Posted: 15 Dec 2017 at 10:07am
| If they are dry then probably not rich. Color is important. Should be sort of tan color. If sort of dark or black then could be a bit rich. many of these units now don't do much except idle around or pull small trailer so spark plugs may not look the same as when the motor is worked hard all day. Very hard to see on those huge pics - what I can see looks okay. |
Posted By: Allis Wd45
Date Posted: 15 Dec 2017 at 10:13am
| Ok I can mess with the carb adjustments and see if it will run leaner. |
Posted By: Reindeer
Date Posted: 15 Dec 2017 at 10:39am
Look normal for a occasional use machine.
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Posted By: Sugarmaker
Date Posted: 15 Dec 2017 at 11:17am
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Yea those huge pictures were not good. The resized one looks about normal. These old tractors will run when lots of things are bad, worn, dirty, missing, wet, corroded, rusty, and oily too. :) 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: Allis Wd45
Date Posted: 15 Dec 2017 at 12:03pm
| Oh boy tell me about it it’s ran on 2 cylinders no power but it’ll run. Would you be concerned about these or just clean them off every once in a while |
Posted By: LeonR2013
Date Posted: 15 Dec 2017 at 12:16pm
| You can try running a hotter plug. |
Posted By: Sugarmaker
Date Posted: 15 Dec 2017 at 12:17pm
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Clean them and have a new set available to put in too. Plugs can get fouled for a variety of reasons. Yea they don't run great on just two cylinders!:) Wire brush them good. What brand are they. I like Autolite way better than Champion. 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: Allis Wd45
Date Posted: 15 Dec 2017 at 1:01pm
| There Autolite 306’s 2 steps hotter than the original 295 |
Posted By: Reindeer
Date Posted: 15 Dec 2017 at 7:05pm
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One thing helped my 170 when I was just using it lightly was to change the thermostat out for a 190 degree one. Made starting a lot better and kept the plugs in better shape. Others may not feel that is the best thing but helped a lot as I used the tractor for snow removal so cold starts were a problem with fouled plugs. ------------- |
Posted By: Allis Wd45
Date Posted: 15 Dec 2017 at 7:30pm
| That's another thing it never gets to 170 I don't know if the guage is wrong if the thermostat is stuck open |
Posted By: Reindeer
Date Posted: 15 Dec 2017 at 7:32pm
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The original thermostat for my 170 was 165 degree as they were expected to work hard, rather than the sedate life they often have now. ------------- |
Posted By: dawntreader74
Date Posted: 15 Dec 2017 at 8:43pm
| the AC-45 plugs work good on the wd-wd45's need good wires' |
Posted By: Allis Wd45
Date Posted: 16 Dec 2017 at 1:06am
| Are those AC plugs still as good with the resistor inside |
Posted By: dawntreader74
Date Posted: 16 Dec 2017 at 1:53am
| there still good' you can still get the AC-46 also; |
Posted By: Allis Wd45
Date Posted: 16 Dec 2017 at 2:00am
| Do you think there better than a Autolite? |
Posted By: dawntreader74
Date Posted: 16 Dec 2017 at 4:53pm
| i wound'it take a autolite plug home for it. they can't keep a push mower running. |
Posted By: Michael V (NM)
Date Posted: 16 Dec 2017 at 6:14pm
Everyone has different opinions.. This is my thoughts about champion plugs....specially in AC's.. |
dawntreader74 wrote:Posted By: Gerald J.
Date Posted: 16 Dec 2017 at 7:08pm
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For at least 15 or 20 years I have found that Champion plug ceramic inside doesn't clean up after getting oiled or carboned from running rich. I have also found in their catalog that vintage tractor plugs are built with an air gap to raise the voltage from the ignition coil because old tractors are always oil burners. There have to be better plugs on the market. Gerald J. |
Posted By: Bill Long
Date Posted: 16 Dec 2017 at 8:25pm
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When we sold them we loved the AC 45, AC 47, and AC 48. The AC 48 being the hottest plug. They worked fine, but that was in the 50's and very early 60's. From being on this site I have learned from SteveNJ that the Auto Light is his plug of choice. Don't remember the number. From our experience we did not use Champions. Just remember that was at least 55 years ago. Things change. Good Luck! Bill Long |
Posted By: Ted J
Date Posted: 16 Dec 2017 at 10:23pm
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When I was a kid growing up we used Champions in everything! Now I won't use em in my lawn mower. Something happened cause they are nothing but junk now. IF, and I say IF, they fire up good for whatever you are putting them in, then let the engine cool off, it's a real bit*$ getting it running again. I don't know what they did...... My go to is NGK. Spendy, but trustworthy. ------------- "Allis-Express" 19?? WC / 1941 C / 1952 CA / 1956 WD45 / 1957 WD45 / 1958 D-17 |
Posted By: Steve in NJ
Date Posted: 16 Dec 2017 at 11:15pm
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Like anything else, everyone has there choice of flavors. I never had any luck with Champion Spark Plugs. Doesn't mean someone else had the same issues as I did. They may not have a problem with them. As my pal Bill Long mentioned, I've been an Autolite dealer since 1970, and had very good luck with their plugs. We sell Autolites to our Antique Car and Truck customer's as well as our AC Tractor customer's, and they seem to be the popular plug amongst AC collectors. For Magneto fired Tractors I always suggested to our customer's to use the hotter 295's. For our customer's running Battery Ignitions (Distributor) if the engine was recently rebuilt, I suggest using the 303's which is the cooler plug. For worn engines that may or may not show a little smoke in the exhaust, I suggest to run the 295 plugs. The 295 plug's are the hotter heat range plug which work quite well in worn engines and do not foul as easy. I've also tried NGK plugs just to experiment with in my own Tractors, and they seem to work well and not foul as easy also. As far as the picture of that plug above, I'm with Reindeer on that one. That plug looks fine to me. Starting and stopping a Tractor often isn't good on a spark plug no matter who the mfr is. If you don't put the Tractor to work after its fired up, there's a big window there that a plug could possibly foul and misfire. With the cold weather upon us, this problem can increase two fold where rich mixtures of fuel combined with a worn & low compression cylinder can easily foul a plug.... HTH 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: Allis Wd45
Date Posted: 17 Dec 2017 at 2:32am
| Well this tractor never gets up to operating temp 170 I've never seen the guage in the green mark even after pulling a heavy drag around for 2 hours so I'm wondering if I should try to put a bag on the grill to try and act like shutters. |
Posted By: Phil48ACWC
Date Posted: 17 Dec 2017 at 4:56am
| I bought a set of these http://www.amazon.com/gp/search?ie=UTF8&camp=1789&creative=9325&index=aps&keywords=ngk%2Biridium%2Bspark%2Bplugs&linkCode=ur2" rel="nofollow - NGK Iridium Spark Plugs from Rock Auto (best price). The full part # is XR4IX / 7189. My WC with WD 45 engine has never run better. I had a brand new set of http://rd.bizrate.com/rd?t=http%3A%2F%2Fwww.amazon.com%2Fdp%2FB01CBC1T54%2Fref%3Dasc_df_B01CBC1T545085119%3Fsmid%3DAOINPCZ0DZZ3J%26tag%3Dshopz0d-20%26ascsubtag%3Dshopzilla_mp_1580-20%3BSZ_REDIRECT_ID%26linkCode%3Ddf0%26creative%3D395105%26creativeASIN%3DB01CBC1T54&mid=184059&cat_id=100001773&atom=100001774&prod_id=&oid=7082978050&pos=1&b_id=18&bid_type=4&bamt=48cd9202db195e9b&cobrand=1&ppr=95876b04671ef51c&rf=af1&af_assettype_id=12&af_creative_id=2973&af_id=615103&af_placement_id=1&dv=3ae5a24c510fd6ea52ba43e86cb62c5b" rel="nofollow - Autolite 295 in there and Number 1 plug would occasionally miss. Number 1 plug had a little color on the porcelain and all the other plugs were clean and like new. I swapped it with # 3 cylinder and then # 3 cylinder started to miss. So the miss followed the plug. I'll never run a conventional plug in anything I own again. http://www.amazon.com/gp/search?ie=UTF8&camp=1789&creative=9325&index=aps&keywords=ngk%2Biridium%2Bplugs&linkCode=ur2" rel="nofollow - NGK Iridium Plugs are a great product! |
Posted By: DougS
Date Posted: 17 Dec 2017 at 5:16am
| Copper core plugs give the hottest spark, fire the easiest, but last the shortest time. Platinum plugs take more voltage to fire, but they last longer. Personally, I wouldn't use platinum without high energy ignition. Iridium plugs are sort of in-between, but very expensive. If your plugs tend to oil-foul you may as well go with the less expensive ones and plan on changing them more often. |
Posted By: Allis Wd45
Date Posted: 17 Dec 2017 at 1:43pm
| I do try to work it when I run the tractor but do you think that the Temp has anything to do with the plugs not cleaning? |
Posted By: DougS
Date Posted: 17 Dec 2017 at 2:09pm
The warmer the engine, the cleaner and more efficiently it will run. Those old Oil Pull tractors used oil as the coolant and were able to run much hotter. Of course the upper limit of how warm you can run an engine is dependent of how much heat the various engine components, including the oil, can handle. Predetonation can be an issue with hot engines too. |
Posted By: Allis Wd45
Date Posted: 17 Dec 2017 at 2:51pm
| Sorry about those huge pictures I didn't realize that until I logged in on my computer I've been posting from my iPhone and they looked fine. |
Posted By: LeonR2013
Date Posted: 17 Dec 2017 at 4:18pm
| As long as those plugs are wet like yours, you'll never have to worry about burning a piston. Before I rebuilt my 45 it used an amazing amount of oil. Someone before I got it had the pistons out and then put them in backwards. Where the wrist pins rubbed the cyl. walls there were two grooves about 1/16" deep by 1/8" wide. It smoked like a freight train and would foul a plug 30 min. I kept thinking about a temporary fix so I could finish my brush hogging. I finally thought of chain saw plugs because they're built to fire in oil. It never fowled a plug again. I used a Homelite XL 923 plug. It started good, ran good, and smoked more than it did before, just because it fired every lick. Since it's turned cold I've been thinking about putting them back in for starting easy. I don't run them in the summer now. |
Posted By: Allis Wd45
Date Posted: 17 Dec 2017 at 6:28pm
| That sounds like a good fix did you ever fix the grooves. What was the number of the home lite Spark Plug? |
Posted By: Phil48ACWC
Date Posted: 18 Dec 2017 at 5:34am
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http://www.rockauto.com/en/moreinfo.php?pk=69518&cc=1324482&jsn=449&jsn=449&jsn=449
Click on site above. $5.71 per NGK XR4IX/7189 Spark Plug. Yes a little pricey, but they run better than any plug I've ever used. They will probably last as long as have my tractor, which has been 20 years so far and hopefully another 20 years into the future. I do run an points eliminating electronic ignition conversion with a high performance coil. The tractor also is completely converted to 12V.
 Starts and runs great at 20 below zero or 95 above. I use my WC with WD 45 engine year round. In the winter snows, if it doesn't start and run, we don't get out. We've always been able to get out in Central Vermont winters. I'll never use conventional plugs in my stuff again. |
Posted By: Dennyswd45
Date Posted: 07 May 2023 at 8:43am
| My rear Tire has a leak on sidewall.I bought a repair kit to fix it and it still leaks.I can buy a Tube and have that put in Tire. 60 Dollars is Better Than 600 Dollars fo a new tire. I wonder if that would fix the leak ?? |
Posted By: DrAllis
Date Posted: 07 May 2023 at 10:32am
| I don't know what you bought to "fix a leak" on the sidewall of a rear tractor tire, but that tire already has a tube in it. No such thing as a tubeless tractor tire on something of that age. I can't see your tires sidewall, but there is such a thing as a large patch called a "boot" to help keep dirt and things from migrating thru a porus sidewall and protect the inner tube. There are also "liners" to lay inside the tire to place a layer of stiff rubber between the tire carcass and the inner tube. Anyway, your inner tube has a leak, not the sidewall. |
Posted By: garden_guy
Date Posted: 09 May 2023 at 10:02am
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Last time I bought plugs the only think I could get ahold of easily was Autolite 306... They are running good in my one WD. |