Posted by 2002sliverado on August 02, 2016 at 08:51:38 from (216.16.75.34):
In Reply to: Dieseling Question posted by Spudm on August 02, 2016 at 08:33:28:
We have a 450 Farmall on our farm that has been known to do the exact same thing. Much of the time the tractor was used as a chore/yard tractor and did not get warmed up properly under most of this use. The tractor has a lot of hours on it, so the engine is rather "tired." I am not sure if that is the case with your tractor, but in the case of our 450, it does "use" oil and I would suspect the tops of the pistons have deposits on them. These deposits, when the engine is warmed up, increase the compression ratio some and are probably hot enough to ignite the air/fuel mixture. What did help out on that old 450, was to take it out and work it some to burn off those deposits in the cylinders and on the tops of the pistons. Hooking it up to a disc or even an old plow in the fall seemed to do the trick and clean things up a bit. It really ran quite well after working it hard. Others may have other thoughts on this, but suspect I am on the right track.
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