boys, I think part of the problem here is, the fact of running of low octane 97 gasoline. [these fuels now days are being blended with at least 10 sometimes 15% ethanol in some areas in the summer months, and these types of fuel have a lot of water in them] a couple other things not mentioned here is the facts
1] if this is a tractor that is not used all the time and the fuel was purchased in the summer months, fuel that is refined in the summer months have higher amounts of ethanol which contains a lot of water, fuel that is refined for winter use has additives to offset the effects of ethanol due to freezing. 2] plus the fact that these tractors were designed to run on ethyl[premium] leaded gasoline, not this "cheap" (lol) 97 octane no lead or unleaded gasoline's available today, if my memory serves me correctly, the octane of ethyl[premium blend] gasoline was around 104 to 106 octane maybe more. I think that some co-ops still offer 100% gasoline, with no alcohol added, and if you cant find 100% gasoline, then I would recommend that you run premium winter blend fuel and even add a container or two of "heat" or some other brand of gas line antifreeze and even add some octane booster. one other thing that I have ran into and I would check is, that the screens that you buy at case IH now days, that goes into the sediment bulbs at the bottom of the tank now is made of plastic, I would make sure that the ethanol has not deteriorated, or plugged this screen. the original were made of brass,
I would also check the screen [if it has one], at the end of the fuel line, just before going into the carbonator to see if it is clean and not plugged as well.
hope these tips might help you solve your problem.
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Today's Featured Article - Oil Bath Air Filters - by Chris Pratt. Some of us grew up thinking that an air filter was a paper thing that allowed air to pass while trapping dirt particles of a particles of a certain size. What a surprise to open up your first old tractor's air filter case and find a can that appears to be filled with the scrap metal swept from around a machine shop metal lathe. To top that off, you have a cup with oil in it ("why would you want to lubricate your carburetor?"). On closer examination (and some reading in a AC D-14 service manual), I found out that this is a pretty ingenious method of cleaning the air in the tractor's intake tract.
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