avant 1735
Member
I am working on a jubilee, tractor was setting outside for about 15 years with no use. I had the head rebuilt, replaced rings and bearings, the sleeves looked great so I did not replace them. all new gauges, replaced the muffler and exhaust, converted it to 12 volt with alternator, new wires, plugs, even put in a hotter burning plug, etc. rebuilt the carb. However no matter what I do the plugs are very sooted up and it will start to miss after about 1 hour or so of running. I have leaned out the carb. as much as I can, and reduced the fuel flow, still no change. When I got the tractor the carb. was not on it. The only thing I did not do was check the intake for dirt dobbers, to see if the have plugged the intake. I cleaned the air breather and replaced the screen in it. It runs very good and idles well, you would not know the plugs are not getting enough air or too much gas. I even put a new carb. (marvel Scheibier) on it and the same thing is happening. I don't have enough hair to be pulling it out, but I am about to. Any suggestions? Thanks