WD 45 sputters, jumps, then dies
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=195722
Printed Date: 23 Aug 2025 at 2:50pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: WD 45 sputters, jumps, then dies
Posted By: JRM442
Subject: WD 45 sputters, jumps, then dies
Date Posted: 17 Jun 2023 at 10:41am
Hi all I was out mowing my pasture. She was humming right along for a good hour,then slowly started losing power. I limped back to the barn, sputtering, jumping, dying. Always re-started. Here is what I've done. Pulled gas line from carb to check flow. Steady, full flow for a minute. Inside of tank is spotless; the inlet shows no obstruction unlike the last time it acted up and I found a ladybug blocking fuel flow..but that's another story! I pulled the carb and thoroughly cleaned it with my carb rods, gumout, air. This is a re-built carb from Yesterday's Tractors, installed 9/18. Re-installed carb. but did not connect the air cleaner hose. Still no good. At one point it had a backfire through the carb, i.e. puff of white smoke before dying. Pulled it again to re-check the needle and seat (Viton tipped) and float action. Didn't help, still sputtered for about ten seconds then died. Throttle and choking action didn't seem to affect it much. FYI: 1953 WD 45 (gas). I converted it to 12V nearly 20 years ago. New coil 5/12; new plugs 5/18 (plug insulators are a nice tan color) replaced ignition points, rotor and cap 6/21. I am at a loss. I believe fuel delivery is not the issue, but maybe I'm wrong. Should I focus on electrical/timing?
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Replies:
Posted By: mdm1
Date Posted: 17 Jun 2023 at 11:36am
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Sounds just like what my G was doing. I replaced the condenser and it runs fine. Found an old one. Happened 2 times now. I did what you did thinking it was fuel starvation. Just a thought. Let us know what you find.
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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!
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Posted By: Clay
Date Posted: 17 Jun 2023 at 12:14pm
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Could also be an induction leak. Is the manifold tight and are the gaskets in good condition?
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Posted By: steve(ill)
Date Posted: 17 Jun 2023 at 12:43pm
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i would consider the condenser first.... then the ignition coil.... Elect components break down over time with heat.
you have a 12v coil with internal resistor and not the old type with an external resistor ?
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Like them all, but love the "B"s.
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Posted By: WF owner
Date Posted: 17 Jun 2023 at 1:40pm
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Did you install Champion spark plugs? They could be your problem.
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Posted By: captaindana
Date Posted: 17 Jun 2023 at 1:54pm
Condenser
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Blue Skies and Tail Winds
Dana
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Posted By: ac45dave
Date Posted: 17 Jun 2023 at 3:08pm
Sounds like condenser to me as well.RR174 in Echlin brand from NAPA and dr60 in Standard Blue streak.Those are the only two condensers I will use.Everything else seems to be junk these days.
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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
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Posted By: JRM442
Date Posted: 17 Jun 2023 at 4:45pm
Thanks..I will. I went to Fleet Farm since I know they carry tractor parts including ignition kits. They had 'em for Ford, MF, John Deere, etc., but not for the Allis. I recall I bought a kit there years ago. I too think it's the condenser. We'll see.
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Posted By: mdm1
Date Posted: 17 Jun 2023 at 7:35pm
Blue streak come highly recommended. I just ordered some from Amazon. Check with a parts house they should have them.
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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!
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Posted By: JRM442
Date Posted: 17 Jun 2023 at 10:57pm
Bingo!! It was the condenser! I rummaged through my old parts and found a condenser, (Made in USA). Installed and instant purring, the way it should be. Thanks for all your help and suggestions.
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Posted By: mdm1
Date Posted: 18 Jun 2023 at 12:54pm
Glad you got it going good. Thanks for letting us know what happened!
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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!
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