Re: Spark Plugs

Posted by rustred on January 09, 2020 at 11:09:50 from (74.214.153.210):

In Reply to: Spark Plugs posted by johndeerejim on January 09, 2020 at 06:25:48:

I may as well throw in my few cents worth in also. and I don't want to write a big long story. I have quite a few of these old tractors from the 1950's like over 30 running ones. I would say 90 percent have champion plugs in them. plus these tractors came from factory with champions. when I buy plugs I ask for champions. few years ago I bought a w400 . I checked the plugs and compression in it as I always do in my stuff. it had 3 champions and 1 autolite in it. but the autolite was seized in the head. I used a long breaker bar trying to get it loose. then it broke off at the threads. I thought ooh no now i have to remove the head. but anyhow I got my easy outs and worked at it for a few hrs. and did get it out, without removing head. the thing I am pointing out here is that the autolite plugs have less metal around the porcelain. I compared both champion and autolite by breaking them down and the champion is a better built plug.
but for fouling now, these tractors never get worked long enough to even get hot and turn the plugs brownish grey, as a plug should be burning. plus the carbs are never adjusted for optimum performance, once the other settings are done, compression check, valve lash, points and timing. I have john deere's also. and when running they with a steady rythem or beat at idle. no misfiring. they have champions in them also. I don't care what plug you have , once it gets fouled and black it will not fire properly. plus plugs can be cleaned in a sand blaster and the electrode is to be filed flat then regapped to spec. you want the electrode flat not rounded from use. this gives you the best spark. I have pulled many plugs out of the garbage can and used them. as for autolite or champion I don't see any difference in engine running using the same heat range plugs.

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