Oil & Fuel Farmall 400 question

[mjlyda]

I've got a farmall 400, I dont run it much. Mostly sits in the barn waiting to be restored. But when I do run it, I am constantly having to replace or clean the plugs. They are always fouling up after a few hours of use (25-50 hrs). I've been asking around and I was told its from the carb running too rich. So I plan on adjusting, but not sure on how much adjustment it needs. How much adjustment are we talking? Or, am I off base completely with the adjustment? Any advice?

 

[art]

It would be best to see the plugs to know that they are fouling from gas and not oil!

 

[geneP]

I had a IH 354 doing that. The spark was a weak yellow when the plug wire was held away from the plug. I replaced the coil with a new automotive coil and stopped it.

 

[cup149]

Could be too rich, not run long or hard enough to burn off deposits, oil fouling, plug too cold (use Champion D21 with modern fuel).