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Farmall & IHC Tractors Discussion Forum
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farmall super m stage 1

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jack-iowa

07-14-2007 13:52:40




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anyone have a diagram or know where to get one of the carburator and know the settings of the screws.
thanks
jack




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the tractor vet

07-14-2007 14:18:45




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 Re: farmall super m stage 1 in reply to jack-iowa, 07-14-2007 13:52:40  
Top screw one turn off the seat bottom main jet screw 3 1/2 to 4 turns off the seat and do not force it into the seats , this is a good starting point and fine tune from there.



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jack-iowa

07-14-2007 14:58:39




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 Re: farmall super m stage 1 in reply to the tractor vet, 07-14-2007 14:18:45  
thanks
know anthing about the brass slotted screw on the bottom of the carb toward the front of tractor? looks like a drain ,if I loosen it up it leaks out but the screw itself does not come out
jack



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D Slater

07-14-2007 15:55:08




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 Re: farmall super m stage 1 in reply to jack-iowa, 07-14-2007 14:58:39  
Interpret question different than TV. If screw head is around 1/2 inch diameter, its actualy a nut that holds main discharge jet in bowl of carburetor. Theres a gasket under nut and one on other end of jet. If it won't tighten or leaks the bowl has to be removed to get to other end. If this is not what you mean forget about this post.



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the tractor vet

07-14-2007 16:07:52




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 Re: farmall super m stage 1 in reply to D Slater, 07-14-2007 15:55:08  
If it is a S/M carb then there is no screw or nut that holds the jet in and the only thing on the bottom of the carb is a square headed drain plug and the weep hole , no on a Carter or Marval Shibler and a Zenith then your wright . But they don't use any of them on a M- 856



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georgeky

07-14-2007 20:47:39




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 Re: farmall super m stage 1 in reply to the tractor vet, 07-14-2007 16:07:52  
I hated to get into this, but I went and checked both my M and 400 and they are as you say. The M with original carb has only a square headed drain plug and weep hole. The 400 has the weep hole, the round nut with a slot and drain cock on it. I also cheked the IT manual for each and am getting conflicting info from those. It does show the round slotted nut in it for the M, but mine doesn't have it.

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D Slater

07-15-2007 06:03:12




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 Re: farmall super m stage 1 in reply to georgeky, 07-14-2007 20:47:39  
George what is the carburetor # on round tag for your carburetors. If your M doesn't have the round nut between drain plug and weep hole its not a original. If you have a actual 400 carburetor on the 400 and it does have the nut, its one for distillate or kerosene 400. Gasoline 400 carburetor # 362173 R91-92 etc didn't use the nut because jet screwed into bowl. Rusty Farmall on here rebuilds carbs, what does he say on the subject.

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georgeky

07-15-2007 08:12:24




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 Re: farmall super m stage 1 in reply to D Slater, 07-15-2007 06:03:12  
I went to check the M and couldn't find the part number as it is still on the tractor, but it is possible I guess that the uncle may have changed it. He put 4 inch fire crater pistons in it back in the late 60's or early 70's and maybe a 400 head on it, so it is possible that he put a 400 carb on it as well. When I take it off I will see if I can find the number and see what it really is. That is the trouble with tractors this old, you never know really what has been done or changed in the past. The only time I have even had the head off was in 1990 when dad decided to put new rings and bearings in it, and have the head gone over. It may even have a 400 cam for all I know. It does have more power than the run of the mill M. My other M is on the other farm and can't check it today, but there is no telling about it either as it has M&W 4 inch pistons in it and who knows about the carb.

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D Slater

07-15-2007 08:33:39




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 Re: farmall super m stage 1 in reply to georgeky, 07-15-2007 08:12:24  
On a 400 450 type carburetor the idle air ajustment screw will be high on carburetor (just below manifold) compared to lower placement of M type. Also if the choke lever on carburetor is toward engine instead of away as mounted, thats a indication it may be a 400 or some other carbs that way like the super M. Super M will have the idle air adjustment in same place as a M though.



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georgeky

07-15-2007 08:54:16




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 Re: farmall super m stage 1 in reply to D Slater, 07-15-2007 08:33:39  
If that is the case both my M's must have 400 carbs on them as they both have the choke rod against the engine and the idle air screw is at the top. I have had Super M's all along I guess. I know the first time a buddy and me took yhe 48 to a tug pull we were told that a straight M wouldn't compete with those boys. We came in second that night. Was beat by a JD 60. After redoing my drawbar and changing the pitch on the hitch, I could get the front end off the ground about 10 inches and have beat that old 60 everytime since then. After that first night everyone wanted to know what we had done to the M. Doug told them we had raked hay with it until 5 o'clock and put in 5 gallons of gas for the pull.

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georgeky

07-15-2007 07:55:04




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 Re: farmall super m stage 1 in reply to D Slater, 07-15-2007 06:03:12  
The book does show the 400 carb as a distillate or kerosene carb. I will go check the M again, but I am almost certain it is original, but will have to ask dad and my uncle who bought it new. I do know it has been on there since dad bought it from the uncle in the 70's.



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D Slater

07-14-2007 17:45:27




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 Re: farmall super m stage 1 in reply to the tractor vet, 07-14-2007 16:07:52  
Hate to argue with a knowleagable person, but you are wrong. M and SM do have the nut. 400 and 450 gasoline carburetors don't have it. I'm talking about the nut with screwdriver slot that holds discharge nozzle with 3 rows of hols in it.



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the tractor vet

07-14-2007 19:32:38




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 Re: farmall super m stage 1 in reply to D Slater, 07-14-2007 17:45:27  
Well i know that my S/MTA does not have a nut on the bottom and the M carb setting on the shelf in the pantry does not So somewhere i am missing something here as none of the M- S/M carbs that i have had apart as they all looked like the rest as i have used the float bowls on other tractors with a jet change and few other pices and parts as i have done a few for lets say non farming operations . like in my one buddys S/MTA that was reworked that now has the 1 1/8th. ventura in it and on the dyno it is pullen as much as a 806 gas now it does have FEW other mod's . But like i said i have never seen one that the syphion jet has a screw in the bottom on the side for main fuel . So hay shoot me .

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jack-Iowa

07-14-2007 18:22:20




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 Re: farmall super m stage 1 in reply to D Slater, 07-14-2007 17:45:27  
yea had to split the carb to see what that screw went into .yea about a 1/2 inch. and yep went to a jet.so it does not matter how that is set as long as it does not leak?
anything special about putting it back together? there is a round sleve of sort that has a groove at one end and it looks like it just slides up and down.anything special?
thanks for all the help guys.



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the tractor vet

07-14-2007 15:12:02




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 Re: farmall super m stage 1 in reply to jack-iowa, 07-14-2007 14:58:39  
That screw is the main jet screw and yes it will leak if ya try and take it out , if it is drippen a bit there is a nut that that screw goes into that has a packing behind it you can try to tighten it just a wisker unless it is bottomed out already and if this is the case then you'll have to go to Case I H and get and get a new packing for it .



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RustyFarmall

07-14-2007 19:05:46




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 Re: farmall super m stage 1 in reply to the tractor vet, 07-14-2007 15:12:02  
The Tisco carb kits that I sell do have that packing in them.



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the tractor vet

07-14-2007 19:38:14




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 Re: farmall super m stage 1 in reply to RustyFarmall, 07-14-2007 19:05:46  
Never used Tisco , when i did have to work on a carb i just run down to my friendly Case I H store bought two gskts a needel and seat and a packing and if it needed rebushed i got that also along with a new throttel shaft.



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