Posted by SuperABen on December 29, 2012 at 17:37:39 from (184.21.243.186):
In Reply to: Re: bn running poor posted by old on December 29, 2012 at 17:08:36:
Old, I have seen a similar pattern for many Champion spark plugs these days. Junk. It's a shame, since Champion used to be one of the best.
The Autolite crossover is a 386.
You are probably right that Autolites are best. You are the man to know! However, my A will only run on Champion D21's. On my first restoration, a Farmall Super A, Case IH gave me Autolite plugs. They worked for about a month before they acted up. Started the tractor and it ran like a pile driver, snorting and acting like it was over choked, reving and literally exploding gas in the exhaust manifold. I shut the thing down and dropped in the four D21's that were in it when I bought it. It started back up normally and has run great since.
My other A did a similar trick on Autolites. It suddenly started losing power down the highway in road gear. By the time I turned it around towards home, it couldn't drag itself in first. But four new D21's later, didn't touch a thing else, and it was ready to roll. I now keep four D21's in reserve, just in case.
I pass the floor to you, Old, though, as I have read these forums long enough to know that you are an expert on red tractors.
Now, I know that "what's best" depends on more than just a plug. Fuel mixtures, timing, etc, can give different figures. Assuming the perfect tractor that is required to work in the field, what spark plugs best match what IH put on the machines? Have you found Autolite to be the best?
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