David G, When younger a friend had a small airplane. At higher altitudes, the air is less dense and engine would run rich. To adjust the carb, he pulled on a lever which made the mix go lean. He used an exhaust temp gauge to get the mix perfect. As you lean the carb out, the exhaust temp will increase to a point. After you get to max temp and you continue to lean carb, the exhaust will decrease.
In the early 70 Chrystler experimented with a lean burn engine, before fuel injuection and the modern computers. So going too lean will actually cool engine. Chrysler also played with varing the timing to compensate for engine pinning and engine temps.
After I couldn't get leaded 98 octane for my 62 XKE, I had to retard the spark.
I recently purchased an exhaust temp gauge, $22 off ebay and installed it on my Jubilee. I cranked the main jet in 2 1/2 turns from winter setting to get max exhaust temp. Another 1/8 turn in and exhaust temp decreased big time, just like the airplane. My spark plugs look like new, no carbon deposits.
Other options: My IH C has notches on the throttle settings. When I bought it, someone set the carb so in the lowest position the butter fly in the carb was completely closed and engine would die. I have to put throttle on the 3 notch for it to idle properly. It's like turning off a diesel. Restrict air flow and engine stops.
My Terramite has a gas solenoid valve. To stop the 20 hp kohler command engine, the ignition switch, in the off position, would short out both coils, just like a lawn mower. I discovered that the engine would die in about 5 seconds if I removed power to solenoid. So I removed the coil wire from switch, turn key off and let the engine run out of gas in 5 seconds, no dieseling.
Recently I installed a gas solenoid on my Jubilee because the carb leaked gas on barn floor. If my Jubilee decides to diesel on a hot day, I will do the same thing, remove power from solenoid and let it run out of gas.
Try simply turning the gas off and let your tractor run out of gas. Bet it can't diesel with no gas in carb. Please try it and post back.
Yes, in my opinion, carbon will cause dieseling. Carbon is caused by too rich of a mix. Lean out your carb. A rich mix will also cause the oil on cyclinder walls to burn off, causing excessive ring wear. George
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 - Ford Part Number Trivia - by Forum Participants. "Replaced by" means the part was superseded. All of my part books date back to 1964 and New Holland have changed some part numbers. They usually put the old Ford part number on the package. I was suppressed when I looked up the part number of the auxiliary drive shaft because for some reason the part number went through a radical change and it lost its "Basic Part Number". Ford part numbers follow the following rules. Most part numbers are in three parts. The middle part is called the
... [Read Article]
Latest Ad:
Sell 1958 Hi-Altitude Massey Fergerson tractor, original condition. three point hitch pto engine, Runs well, photos available upon request
[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.