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8N Sparkplugs

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Larry Kastens

11-29-2000 21:32:49




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Here in southern Arizona the Ford 8N has a problem with sparkplugs. My neighbors and I are lucky if we can get two months out of a Champion H 10 plug. The electrode breaks down, causing the engine to miss. After we put in a new set of plugs, everything is perfect for a couple of months. Does anyone have any suggestions? It is not a problem of plug fouling or carbon buildup. Thanks.




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kevin (mo)

11-30-2000 19:42:41




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 Re: 8N Sparkplugs in reply to Larry Kastens, 11-29-2000 21:32:49  
the same thing happened to me, switched to ac 437 and problem solved. they are better plugs for the 8n.



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Brian *N* S. IL

11-30-2000 06:13:18




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 Re: 8N Sparkplugs in reply to Larry Kastens, 11-29-2000 21:32:49  
Larry,

Are you sure you aren't running too lean? What exactly do you mean by "the electrode breaks down?" If the actual electrode is breaking off or eroding that badly, it may be a symptom of severe detonation or extreme plug temperatures due to a lean mixture. I think you are seeing a symptom of a bigger problem with your engine.



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Larry Kastens

11-30-2000 19:21:59




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 Re: Re: 8N Sparkplugs in reply to Brian *N* S. IL, 11-30-2000 06:13:18  
Visually, the sparkplug looks new but the spark doesn't reach the electrode.



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Harold

11-29-2000 22:26:09




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 Re: 8N Sparkplugs in reply to Larry Kastens, 11-29-2000 21:32:49  
I was also having trouble with my tired 9N going through spark plugs frequently. I switched to a set of H12 plugs and only changed them twice per year.



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