WC missing
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=35249
Printed Date: 03 Apr 2026 at 10:44am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: WC missing
Posted By: kschab92
Subject: WC missing
Date Posted: 08 Aug 2011 at 9:08pm
| Cant get my wc to idle right. Magneto sparks on all cylinders and I just had the carb rebuilt. I have tried to time it but I can move the magneto to its full limit and there is no change in the idle. Any help? thanks |
Replies:
Posted By: MNLonnie
Date Posted: 08 Aug 2011 at 9:21pm
|
How was it before you rebuilt the carb? ------------- Waukesha B, B, IB, G, styled WF, D17, 615 backhoe, M7, 2-Oliver OC3's, 5 Ford Model T's, 3 Model A Fords, 34 Ford coupe, 57 T-Bird |
Posted By: kschab92
Date Posted: 08 Aug 2011 at 9:33pm
| It missed before too. Before I had it rebuilt it would only run on choke. |
Posted By: CTuckerNWIL
Date Posted: 08 Aug 2011 at 9:48pm
|
My 35 has a Marvel Schebler off a 47WC. It won't idle either. I did the carb myself and I went through it again after it was completely assembled. The guy that did final assembly also went through it. He says it's cause I don't have the air cleaner hooked up and it's not the "right" carb for the engine. I beg to differ, the 201 in the 47 is the same engine as the 201 in the 35 except now I have 4.125 pistons. Does my idle jet need opened up?
------------- http://www.ae-ta.com" rel="nofollow - http://www.ae-ta.com Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF |
Posted By: CTuckerNWIL
Date Posted: 08 Aug 2011 at 9:50pm
|
Not meaning to hijack the post Kevin. Just thought I could bring some more thought into this subject.
------------- http://www.ae-ta.com" rel="nofollow - http://www.ae-ta.com Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF |
Posted By: kschab92
Date Posted: 08 Aug 2011 at 9:58pm
| I have origional everything. The only thing that's sticking out in my mind is I have a high altitude serial number. |
Posted By: LouSWPA
Date Posted: 08 Aug 2011 at 10:10pm
|
Well, "missing" and running rough usually refer to two different things. When they will only run w/choke generally means there is "crud" in the fuel passages, or less common, float is hanging up, or sediment bowl is clogged, causing the engine to run way lean. Rebuilding the carb is fine, but if you didn't clean the tank and sediment bowl you are doomed to repeat the process. Charlie, he's full of it! I wouldn't suspect jets at idle, but I think there is an idle fuel passage that may be still clogged.....it's pretty small. also didn't some of them have an idle adjust for that passage? could it be mis-adjusted? ------------- I am still confident of this; I will see the goodness of the Lord in the land of the living. Wait for the Lord; be strong and take heart and wait for the Lord. Ps 27 |
Posted By: Orange Blood
Date Posted: 08 Aug 2011 at 10:13pm
|
A rough running allis, can also be a weak condensor in the distributor ------------- Still in use: HD7 WC C CA WD 2-WD45 WD45LP WD45D D14 3-D17 D17LP 2-D19D D19LP 190XTD 190XTLP 720 D21 220 7020 7030 7040 7045 3-7060 Projects: 3-U UC 2-G 2-B 2-C CA 7-WC RC WDLP WF D14 D21 210 7045 N7 |
Posted By: kschab92
Date Posted: 08 Aug 2011 at 10:18pm
| All the cylinders will throw a 1/2 in spark |
Posted By: CTuckerNWIL
Date Posted: 08 Aug 2011 at 11:14pm
|
My 35 has a rebuilt RV4B mag with good spark. Clean tank and new sediment bowl and fuel line to carb. Mine will not clear up with choke, smooths out at high RPM though.
------------- http://www.ae-ta.com" rel="nofollow - http://www.ae-ta.com Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF |
Posted By: Steve in NJ
Date Posted: 09 Aug 2011 at 6:27am
|
Missing or running rough could mean a lot of things, from something real simple to carbon stuck under a valve, or even a valve going south. A compression check would be in order first on my list of things to do. This will establish a starting point on what's going on inside the engine. Then go from there. If the compression is within spec, it could be something easy up top. Ignition, tight valve. whatever. If the compression is down, or down in one hole, there's a good place to start looking.... HTH mailto:Steve@B&B - Steve@B&B |
Posted By: john(MI)
Date Posted: 09 Aug 2011 at 8:06am
|
Spray something flammable around the manifold when it's running. could need gaskets. ------------- D14, D17, 5020, 612H, CASE 446 |
Posted By: CTuckerNWIL
Date Posted: 09 Aug 2011 at 12:33pm
|
Mine has everything new internally. It surges when you try to idle it cause the governor catches it before it dies when trying to idle. It does run fine at high rpm. ------------- http://www.ae-ta.com" rel="nofollow - http://www.ae-ta.com Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF |
Posted By: acwdwcman
Date Posted: 09 Aug 2011 at 1:48pm
------------- wd with a freeman model 90 trip loader, wd45, 38 unstylled wc, b 10 garden tractor and 2-14 ac trip plow. grandpa has a 56 wd45. wd. allis chalmers snap coupler blade and 3 bottom snap coupler plow |
Orange Blood wrote:Posted By: Thad in AR.
Date Posted: 09 Aug 2011 at 8:56pm
| I agree with John check for vacuum leaks but please don't spray carb cleaner on your pretty paint. |
Posted By: kschab92
Date Posted: 09 Aug 2011 at 9:52pm
| She's gettin new paint no worries |
Posted By: kschab92
Date Posted: 09 Aug 2011 at 10:17pm
| Thanks for all the help everybody! It turns out I need to replace my manifold gaskets. |