Csae 830 Stumbling

[FarmerHR]

I have a Case 830 Series Model 841 with a 284 inch four cylinder gas engine. I have had the tractor a little over 20
years and it has been an absolutely great tractor. It starts really easy and is really strong. It has not given me any
problems for the 20 years I have owned it.
I was mowing Wednesday and after about 45 minutes, the tractor stumbled. Turned the power take off off and it started to
run fine. About 10 minutes later, it did the same thing. This time I did not reduce the load and it died. It started
right up but about 15 minutes later, it died again. This time it would not restart. Got off and checked to be sure I
had enough fuel and it was ok. About 7 gallons. Since it was getting late, I left the tractor in the field and quit for
the day. The next morning I went out with my tools. It started right up. Shut it down to put my tools on brush hog to
haul them to the barn. Tried to restart it unsuccessfully. Decided to check the fuel system. There was good flow at the
separator, the carb, and out the bottom on the carb. At the carb it filled a 12 ounce can in about 2 to 3 minutes with a
a good steady flow. No sigh of slowing down. Next I checked the voltage before the resistor, after the resistor, at the
coil, after the coil, and at the distributor. The readings were all 14.2 volts. Checked for spark with a spark checker
and there was no spark. Next I checked the points. They were set ok and were moving as it was turned over. Filed the
points with a point file. Got a little white powder when filing. It then started right up. Drove drove it to the barn to
unload my tools. Decided to try to do more mowing since it ran fine to the barn. In about 8 minutes it stumbled again.
Shut the pto off and drove to the barn to take off the bush and put it away in the barn. I started it 3 times during
this process. It started just fine. I drained the fuel out at the carb in about 20 minutes. There was about 7 gallons.
In 20 years I have done nothing to this tractor on the ignition system since it ran so well. It has a little less than
3,000 hours on it.
What are your thoughts on what I should do next ?
I have a complete set of parts-- Cap, Rotor, Points, Condenser, and a coil. I would like to nail the problem down as good
as possible before changing parts.
Also, it was about 95 degrees when all this happened.
Thank you for any help you give me.

 

[Bruce from Can.]

My guess is the coil.So it gets hot and cuts out , cools down starts and runs fine . Until it gets hot again , then it starts to break down, very common description of a bad coil .

 

[oldproudvet]

My first thought is the condensor, it'll fail long before the coil in my experience. It is electrical though, I think we'll all agree on that.........

 

[John Saeli]

3 minutes to get 12 ounces is not a good steady flow. I wonder if you have a restriction in the needle & seat & it is causing vapor lock?

 

[Mike Fitz]

You might want to check the gas cap,I've had a clogged vent cause the same problem.

 

[fixer2u]

The coil could still be the issue like stated, but I would not rule out a fuel issue. We had a similar issue with our 830 diesel. Would start and run great for a while, then when brush hogging after a while would start to sputter. Shut off the pto and would run fine, start cutting again and would sputter after a while. With engine off good steady flow of fuel at the lines.

Changed and bled the filters, did not solve the issue. Unscrewed the sediment bowl from the tank and found tree buds in the hole and in the elbow of the sediment bowl. Seemed like there was one in there at all times, then some more floating around that would collect at the hole when she was really working and sucking fuel hard while cutting. You take the load off and they would float away and it would run fine. Cleaned the gunk out of the tank and problem solved.

 

[fixerupper]

The condenser is easy to replace. Give it a try first.

 

[CNJ152]

I will tell we had an issue with, a friend's Heston wind rower doing the same thing the local dealer had done all the obvious things. The mechanic asked my brother and me to come help him. We found as some said the elbow was plugged, with a wasp. Removed wasp and no more problems. Check the gas flow.
Cbj152

 

[FarmerHR]

You folks are great ! This coming weekend I hope to try out all your suggestions and see what happens. I will get back with you and try and close the loop.