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Farmall & IHC Tractors Discussion Forum
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M spark plugs

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harley1983

10-14-2004 20:42:18




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Howdy all. Got another M the other day and it has Champion D21 plugs in it. The electrode looks awfully small. Is this the right plug? I would like a good hot plug I think that don't misfire and sputter with the loader on it. Thanks guys, Harley




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John M

10-15-2004 05:22:39




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 Re: M spark plugs in reply to harley1983, 10-14-2004 20:42:18  
I had the same ones in my M,took those out.After only about 4 hrs of running they began fouling left and right.I thought it was my M.Put a set of Autolites in it,I think 388s,and it been running fine with the same plugs for about 10 years now.(it doesnt run that much,maybe 4 hrs a year.)



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CNKS

10-16-2004 18:51:41




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 Re: M spark plugs in reply to John M, 10-15-2004 05:22:39  
I believe D21's are the about same heat range as Autolite B11, 388's are equivalent to D23's.



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harley

10-15-2004 05:34:33




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 Re: M spark plugs in reply to John M, 10-15-2004 05:22:39  
Thanks John, on my way to town this morning, just as well get a pair, Harley



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Andy Martin

10-15-2004 06:08:43




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 Re: M spark plugs in reply to harley, 10-15-2004 05:34:33  
If you're in town anyway, go all out and get two pair : )



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Harley

10-15-2004 08:43:25




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 Re: M spark plugs in reply to Andy Martin, 10-15-2004 06:08:43  
Thanks Andy, didn't see this till I got home, but when I got up off the floor laughing I thought, Now this is something I would have caught and jumped on like a duck on a junebug. You're right of course, don't want it sounding and pulling like one of them green things. Thanks, Harley



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steveormary

10-15-2004 10:20:26




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 Re: M spark plugs in reply to Harley, 10-15-2004 08:43:25  
Harley;

Used Champion D-21 plugs in all my gas tractors. Had plug fowling problems. Started using sta- bil in the gasoline and that seemed to stop the fowling.

steveormary



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