c-man's sounds like a new rebuild on the motor so I think it's safe to eliminate hot chunks of carbon or the burrs at the top of the cylinders being hot enough to make his engine diesel.
Cam timing can be off. Though it's still out there as a possible cause, I'll assume for now he got that right or never monkeyed with it at all.
Running an engine with the ignition timing retarded can easily cause it to run sufficiently hot to diesel at shutdown, especially if it has been run up to speed. In my exerience with older, timing is the notthe only, but the most common cause of his problem, and is only more common with the lower octane fuels we have these days as compared to what was available in the fifties.
That is not to discount your advice about his idle speed. If his valves are at all leaky, the angular momentum left in the motor could cause it to turn far enough after shutting down the igintion to draw in more fuel that would ignite. But I tend to doubt that a new rebuild with good compression and tight valves in proper time would run on that far.
My exception was not to your advice about the idle speed. It was only to the statement that timing might have nothing to do with it.
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - Hydraulic Basics - Part 2 - by Curtis Von Fange. In the last entry to this series we gave a brief overview of hydraulic system theory, its basic components and how it works. Now lets take a look at some general maintenance tips that will keep our system operating to its fullest potential. The two biggest enemies to a hydraulic system are dirt and water. Dirt can score the insides of cylinders, spool valves and pumps. Wate
... [Read Article]
Latest Ad:
1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
[More Ads]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
