I have my late father inlaws 1947 B JD that he was fouling plugs on it all the time new plugs would foul faster than putting in old used ones.
He was lucky to get 5 hrs run time before fouling a plug. After he pasted I had the same problem with it. I checked the valve clearance, reset the carb. reset the points. It had a real good blue fire spark that would jump 3/4". But would still foul the plugs. You could pull the plug wire off at the plug and let it jump to the plug and it would pick back up the dead plug. I remembered seeing spark jumpers on old tractors in the past to keep from fouling plugs. But I didn't want open spark on it, Too dangerous. So I ground about 1/8" off the contact on the rotor bug letting it jump more inside the cap. That was 6 years ago I have not fouled a plug since. It is 6 volt with a dist.
Has any body else had a problem fouling plugs? Is it due to the gas not being leaded any more? or what? My Opinion is not very high of the spark plugs sold these days for old tractors. We had tried all brands and heat ranges before grinding the bug.
He was lucky to get 5 hrs run time before fouling a plug. After he pasted I had the same problem with it. I checked the valve clearance, reset the carb. reset the points. It had a real good blue fire spark that would jump 3/4". But would still foul the plugs. You could pull the plug wire off at the plug and let it jump to the plug and it would pick back up the dead plug. I remembered seeing spark jumpers on old tractors in the past to keep from fouling plugs. But I didn't want open spark on it, Too dangerous. So I ground about 1/8" off the contact on the rotor bug letting it jump more inside the cap. That was 6 years ago I have not fouled a plug since. It is 6 volt with a dist.
Has any body else had a problem fouling plugs? Is it due to the gas not being leaded any more? or what? My Opinion is not very high of the spark plugs sold these days for old tractors. We had tried all brands and heat ranges before grinding the bug.
