Ih C123 engine Repairs

[DavidBarkey]

Long story short is the tractor will run for about an hour then starts dying and you need choke to get it back .
Work done this summer chasing this problem . Checked and clean fuel tank , checked fuel flow from tank, cleaned fuel cap ,new carb , rebuilt Magneto and placed plugs and wires . None fixed problem . Season over I now can spend time in my shop doing systematic diag.
Putting new belts on , the top rad hose spigot started leaking at tank . Removed rad , straighten tank from old impact damage and re-solder on spigot and new hose pieces .

hood of 2 exhaust leaks in manifold and one in bottom of muffler are apparent . I have another muffler and welded patches on manifold to see if the exhaust build up is causing enough heat to vapour lock the fuel line to the carb . Pulled the rocker cover , made new gasket and set the valves , intakes were a little tight . Most likely from erosion due to unleaded fuel . I don't think it is enough to cause the problem . Needs an oil change and the pan is leaking . So out with the oil , drop the pan to find a crack in the corner and no sealer at the front and junctions . Again make new gasket . It is cheaper and quicker to buy a roll of gasket material and make my own . They are very simple gaskets and I have the hole punches . That is tomorrows job. Before this tractor (early 50s Farmall super A ) I had not worked anything that old . Learning lots of new things , its been fun .

[propane1]

Atmospheric vent in carburetor plugged some. Gas tank vent plugged some. Oil bath air filter cleaner plugged up. Loosing spark voltage. Carburetor frosting up.

Noel

[JSinMO]

I experienced almost the same issue with my 1953 Super H. It has the C164 engine. Basically the same design as what you have there just bigger displacement. It happened twice to me. The first time turned out to be the gasket between the carburetor and manifold failed and it was sucking air. Second time one of the bolts that hold the carburetor half’s together stripped, I assume from years of vibration, and again it was sucking air at that spot. In both instances the tractor would start fine and after working for awhile it would sputter and needed choke to keep running.
You said it has a new carburetor so I would assume that’s not the problem.

I know you patched the manifold but looking at the pictures it looks pretty rough. My guess is that’s where the problem may be. After getting warned up I’m wondering if an unseen crack on the intake side of the manifold is opening up causing the issue. Inside that hole on the face of the manifold where the intake and exhaust come together looks like a prime spot for an internal crack.

If you decide to replace the manifold you may want to recheck that engine size. The model A and Super A I believe both used the C113 engine and a Super C would be the C123 engine.

I can’t swear to it but I think the Super C C123 engine would bolt into an A so it may very well be a replacement engine. Not sure if the manifolds are the same between the C113 and C123. They may very well be the same head / block just punched out a bit for the Super C.

Let us know what you find.

[DavidBarkey]

I thought it was a C113 but it has C123 right on the block . All the parts I have bought for it so far said fit both Ih C113 and C123 . I was told by the owner that it is a Super A .
It appears to be a Super A with a Super C engine in it from what I can tell by descriptions of each. but I am no expert on this .

[JSinMO]

It’s definitely an A/Super A tractor. The Cub, A, and B all used the offset “cultivision” seating arrangement, with the B being the narrow front version. C, H, and M all had the operators platform in the center of the tractor.

I had to go back and look and the regular C also used the C113. So it makes sense the C123 would be the same block and head and fit right into an A and share a lot of parts.
It’ll be a handy little tractor again one you get the bugs worked out!

[DavidBarkey]

Well , the other day I did 2 hours going around in circles pulling my small offest disks in our garden with the Farmall . Never missed a beat . Now that I know that it is good , we ordered a new manifold , muffler, and steering box rebuild kit . But that won't be in until the first of next month . So we have a new Lawn Ornament. for a while . I will put it right next to the New Idea 329 Supersheller 2 row corn harvester / sheller that I am rebuilding for my favourite farmer . All the bearings are original and the sheller side is all non greaseable stamped steel flange bearing . This thing is from the sixties and is perfect for a small operation and allows him to split the harvest to fall and spring . Parts and labour will be under a grand Canuck . With perchase price is still under what they are going for for good one States side . And I get to play with something else new to me . Not many of these show up at an Auto shop or race track .

[JSinMO]

Sounds like fun! Glad you got it running good. I’m might be the only one but I’d love to see some pictures of that sheller!

Are you able to get parts for the tractor north of the border, or do they have to come from down here?

[DavidBarkey]

Sounds like fun! Glad you got it running good. I’m might be the only one but I’d love to see some pictures of that sheller!

Are you able to get parts for the tractor north of the border, or do they have to come from down here?

Parts all come from the States but through an Ontario Vintage tractor parts dealer . I will take some pictures of it and as I tear it down to rebuild .

[propane1]

What was the trouble with why it didn’t run correctly ?

Noel

[DavidBarkey]

What was the trouble with why it didn’t run correctly ?

Noel

It would run good for about an hour , then start to stumble and would only run with choke on . It appears that the exhaust leaks were building enough heat the fuel was vaporising in the fuel line running under the hood .