Posted by don656 on October 09, 2011 at 10:41:25 from (75.179.143.177):
I took the d-21 plugs out this morning and put it autolite 386 plugs. The difference is like night and day! I plowed 4 more acres and the tractor is running fine. It recovers well when it bogs down and when I pull the TA lever it recovers right away and smoothly. With the d-21 plugs it had difficult recovering when I pushed the clutch in.
I am a little worried that I might have damaged the engine with the d-21 plugs. Two of the plugs that I took out were discolored on the outside of the steel hex portion.
I think it is a little irresponsible for the Case-IH dealer to sell plugs that are too hot for the tractor. When I bought those plugs I told them that those were different than what they sold me the time before, but they assured me those were the correct plugs. What do you guys think?
Also, if less than 93 octane gas is damaging to the engine, that I have probably done some real damage to that engine. I have put about 500 hours on it with 89 octane gas. How can I tell if and how much damage I have done?
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Today's Featured Article - An Old-Time Tractor Demonstration - by Kim Pratt. Sam was born in rural Kansas in 1926. His dad was a hard-working farmer and the children worked hard everyday to help ends meet. In the rural area he grew up in, the highlight of the week was Saturday when many people took a break from their work to go to town. It was on one such Saturday in the early 1940's when Sam was 16 years old that he ended up in Dennison, Kansas to watch a demonstration of a new tractor being put on by a local dealer. It was an Allis-Chalmers tractor dealership,
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