Clues From Spark Plug Fouling

Posted by Jim on April 26, 2003 at 19:04:43 from (63.188.49.67):

A few weeks ago I installed new spark plugs on my '55 Ferguson TO-35 Deluxe (Gas); the tractor is new to me. I've operated the tractor maybe twenty-five hours since replacing the plugs. Today I pulled the plugs to see what, if any, fouling occured. The plugs were oily with built up carbon. I cleaned the plugs and returned them to the tractor. The tractor's engine runs fairly well and is generally smoke free although it does have a small amount of white smoke when operating at a low idle. I don't work the tractor hard; only finish mowing and that at low speeds - sometimes in High 2 on the long and flat runs. Would you agree that the oil & carbon on the plugs points to oil leaking into the cylinders but the absence of smoke suggests the leakage isn't bad? Does it make sense to use a "hot" spark plug to burn the oil? If yes, does anyone recommend a specific plug? Almost forgot, right now I'm operating the tractor using synthetic oil for the purpose of "bathing" the inner engine components (a technique recommended by a mechanic and validated by local MF Rep.). I'll replace the synthetic with 10W 30 soon. Is it likely the plug fouling might stop if I switch to natural, heavier oil? Would it help to disconnect the mower and run the tractor in High 3 now and then?

Jim

Follow Ups:

• Re: Clues From Spark Plug Fouling Ray,IN 19:48:51 04/27/03 (0)
• Re: Clues From Spark Plug Fouling RAB 22:18:05 04/26/03 (0)
• Re: Clues From Spark Plug Fouling HB 21:12:35 04/26/03 (0)

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