I bought my first tractor a month ago. It's an 8N with a front mount distributor, currently a 6-volt system. Can't read the number on the side of the engine. I can get it started but it only runs for a couple of seconds before it dies. I tried to get it started today but after 7 hours my patience wore thin and I went inside. I have changed the points, plugs and have had the carb rebuilt. It is getting plenty of gas. Could this be a coil issue or maybe a bad ignition? Any help would be greatly appreciated. My apologies if this topic has been covered.