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Case Tractors Discussion Forum

841 no start

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12-02-2019 20:29:34

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Good evening all. I purchased a 841 about a year ago as a project tractor and well, i still don have it running. It is in pretty good physical shape but won't fire. It is a 63' 841 gas. I have rebuilt the carburetor with no change. When i crank the tractor over with the choke set raw fuel runs out of the intake end of the carb. Hence why i rebuilt it, after rebuild same thing. I did some research and found out that some of these old tractors will pour raw fuel out with the coke set at full on. I bought the tractor not running from a gentleman that used it regularly to move trailers around on his property, then it wouldn't start one day and it sat for two years before i bought it. I have no idea what he has done to it prior to me buying it other than he has a 6 volt ign. coil installed but he told me that he thought it was a 12v system with a 12v battery. Im lost at my next diagnostic point. I feel pretty confident in my abilities but just cant figure this ting out. Turns over good, i checked for spark one time and it appeared to have it, fuel during out of the carb and still no go. I appreciate all and any words of advise. Im excited to get this thing fired up running and working. Looking to complete a full restoration on it in the next few years. Thanks all!

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12-03-2019 08:57:19

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 Re: 841 no start in reply to wisconsincase, 12-02-2019 20:29:34  
Time for a course of trouble shooting 101 so here goes
#1 Pull the center wire out of the distributor cap and turn it on and spin it over. Hold that wire about a 1/4 inch from the block. When you do that you should have a good blue/white spark. Nothing less then the color I say and the gap has to be that or more. Next put the wire back on the cap and check that you have the same spark at al the plug wires.
#2 pull the carb drain plug and make sure you have a good steady flow of gas that will fill a pint jar in less then 3 minutes. YES do catch it so as to look for water.dirt etc. Let the gas sit a couple minutes. It it has 2 colors to it then it has a lot of water in it and an engine does not run on water. BTDT #3 pull the air intake tube off the carb. Hold your hand over the intake while you try to start it. You should both feel a good suction and get gas on your hand. It may even try to start if you do that.
Post back what you find so we can help you help your self

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John Saeli

12-03-2019 06:08:56

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 Re: 841 no start in reply to wisconsincase, 12-02-2019 20:29:34  
Yes, it is a 12V system. 6V coil was used with a ballast resistor. Plugs should be Autolite 3116. Anything else, toss them. Wires need to be real copper core. Silicone or "Radio Suppression" wires will lose their ability to carry current over time. Clean & gap the points, .020".

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Jon f mn

12-03-2019 03:46:37

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 Re: 841 no start in reply to wisconsincase, 12-02-2019 20:29:34  
Gas running out of the carb at full choke is normal for those. That also says compression is good since it needs to draw to pull the gas. Make sure the distributor is turning. Pull the valve covers to make sure the valves are all free. Are the plugs wet or dry after cranking?

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12-02-2019 22:34:33

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 Re: 841 no start in reply to wisconsincase, 12-02-2019 20:29:34  
Is it 12V?
Do you have 1/4" air gap arc at the lead from the coil to cap?

Is the dist rotating, ie is the timing off?

Are the plugs good?

Is the intake free

Might line up the timing mark and pull cap- rotor and points line up/open respectively?

Check resistance of coil, might not be putting enough spark to jump gap.

Is the carb setup right, I think fuel screw out 2 turns from seated and main jet screw out 1 turn from seated.

These are a few things that have held me up in the past. That and condensers for the points.

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