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Discussion Forum

Missing H

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09-02-2002 16:49:56

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Hello to everyone,

My name is Ben and I am a big fan of IH. So big, that I have a 44 H in my garage as well as a 130. I bought the H cheap at a sale a few years back and have been slowly working at it when I have free time. It was a rough runner when I bought it; so rough that it was only running on two cylinders.

I have been able to get it to run on all four now, and I had the head redone. So now my problem is that it starts up right away but there is a distinctive miss to it.

This is what I have done so far to address the problem. I have adjusted the timing-no difference in performance. I have checked the valve spacing, everything matches factory specifications. I have adjusted the carburator that I had rebuilt when the head was being done.

I played around with everything and there is still a distinctive miss to it, especially when it is under load. I took it for a ride, and when I got up to speed it was cutting out horribly. I look forward to your suggestions, as I just stood there for about 20 minutes yesterday staring at the engine trying to figure it out. That's when I decided to get some expert advice.

Thanks for helping me out in advance I appreciate it very much.


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Dave C.

09-03-2002 15:05:26

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 Re: Missing H in reply to Ben, 09-02-2002 16:49:56  
My 2 cents,dont know if ya have,make sure you have the plug wires in the right spots on the distributor.and be real sure you know the rotor direction of travel and position,to find #1 on the cap.Might be a "crossed" wire.I have done that when changing caps.good luck!

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09-02-2002 18:31:15

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 Re: Missing H in reply to Ben, 09-02-2002 16:49:56  
How does your tractor sound if you pull the choke a little bit? You could have a leak in your manifold. If you choke the tractor a little and it sound better but makes it smoke a little try looking at the manifold for a crack or bad gasket. Also - can you pin down the miss to a cylinder. That could help in figuring out whats happening.

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Ben Huyge

09-03-2002 10:33:53

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 Re: Re: Missing H in reply to Charlie, 09-02-2002 18:31:15  

Thanks for getting back to me, and thanks to everyone else who responded. I should have clarified that it is a distrubtor ignition system on the particular H. Charlie, the choke makes no difference, I played around with it to see if that was a problem, but there was nothing.

The only thing that I did not consider was the possibility for a ballast resistor. I did change the tractor to 12 volt and I purchased a new 12 volt coil, as the old 6 volt gave up the ghost. So I went a purchased one from my local CaseIH dealer. I asked on three seperate occasions whether or not I required a ballast resistor for this particular coil and they said no. So, I went with that. However, maybe I should get one.

Perhaps I should get one to see if that will make the difference. As far a startin goes, the thing sparks right up, so I know the points are in good shape. The plugs and wires are all new, in fact I even exchanged the new plug wires with the ones on the 130 and there was no difference in performance.

I watch the valves, and they all seem to opening and closing the way they should.

However, I will look into all of these matters and hopefully I can figure out the problem.

Thanks again,


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The Red

09-03-2002 11:28:22

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 Re: Re: Re: Missing H in reply to Ben Huyge, 09-03-2002 10:33:53  
Ben is this missing out occuring at the higher RPMs whether under a load or not?

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Ben Huyge

09-03-2002 13:14:26

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 Re: Re: Re: Re: Missing H in reply to The Red, 09-03-2002 11:28:22  

The missing is there constently, at a low idle it is in bad, but when I get the throttle up there it is pretty bad, when I get it under load it is even worse, to the point that it cuts out.

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The Red

09-03-2002 14:48:05

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 Re: Re: Re: Re: Re: Missing H in reply to Ben Huyge, 09-03-2002 13:14:26  
Ben, loosen the two bolts on the distributor base. At full throttle, advance the timing (i.e. turn counterclockwise). If the engine smooths out, then you have one or two broken springs that advance the timing. At 1,800 RPM, the distributor should be advancing roughly 35 degrees. The springs and weights are located underneath the breaker plate which holds the points and condensor.

If changing the timing at full throttle does not help, then I am thinking a manifold leak.

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Jim in Michigan

09-02-2002 18:07:34

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 Re: Missing H in reply to Ben, 09-02-2002 16:49:56  
Stupid question from me here but,,Did you change spark plugs ,wires or points? How about condenser? Are you running it on 12 volts? That will burn the points and make it run rough,, if you are get a ballast resistor from NAPA or other parts place,,,Jim

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The Undertaker

09-02-2002 17:59:47

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 Re: Missing H in reply to Ben, 09-02-2002 16:49:56  

I can't add a thing to what "J" and "Bama" have advised, except check the fuel for water or contaminates?


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Bama Binder

09-02-2002 17:03:24

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 Re: Missing H in reply to Ben, 09-02-2002 16:49:56  
Impossible to tell ver the internet, but I'll take a stab. You made no mention of what you have done to the carb or ignition, so I'll assume that you have replaced all parts that are not to spec like plugs, wires, magneto is good, carb rebuilt, etc. If you have any parts out of spec or old / suspect start there.

After that, I would suspect something is out of spec in the head. It sounds like you adjusted the valve lash and know what you are doing. For some reason, I suspect a sticking or stuck valve. If you have a rythmic popping out of the muffler then suspect an exhaust valve.

Again...hard to tell..and I haven't worked on any magneto equipped tractors as mine have all been post 1948 models.

Best of luck...BB

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J in Pa

09-02-2002 17:02:58

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 Re: Missing H in reply to Ben, 09-02-2002 16:49:56  
howdee ben. do you have a distributer or a magneto? i would try the plug wires for a start. if its a mag, i would try checking the impluse spring and the pawl springs. the impluse some times gets weak or broken as the same for the pawl springs. and not to rule out a vacuum leak some where.just a thought.
good luck and dont forget to check the plugs.

J in Pa

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