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Subject: Spark plugs

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Dave Smith    Posted 11-12-2017 at 19:59:01 [URL] [DELETE]        [Reply] [Email]  
  • Spark plugs
  • With the new fuel with menthol alcohol. What does it leave as a residue after it burns?
    Dave <*)))><

    36 coupe    Posted 11-13-2017 at 06:27:15 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Spark plugs
  • It leaves a film of carbon on the insulator nose.I have tested a gas fouled plug with a model T coil.The spark voltage streams down the insulator instead of jumping the electrode gap.You need a hotter plug to keep the carbon burnt off.My 640 had a new set of H10s when I bought it.Had a lot of trouble with #1 plug fouling.Put in H12s,fouling stopped.You can soak fouled plugs in lacquer thinner in a covered jar.I have found that prolonged idling can foul H12s.Auto Lite 437s are the best choice for Ford tractors.Champion plugs are made in Mexico now and have reports of plug shells breaking off, leaving the threaded portion in the cylinder head.I have had it happen in an Olds v8.This problem was reported in the Farm Show magazine years ago .

    Tim Daley(MI)    Posted 11-13-2017 at 08:03:14 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Spark plugs
  • Guess what 36? Auto-Lite plugs are too. Read the fine print on the box. It also states "Designed In The USA". I would trust any Mexican made part over anything else today no matter if a sparkplug or a Fender Guitar -there is strict Quality Control whereas elsewhere (Cheena) there is none. I use both Auto-Lite 437's and Champion H12's in my N's with very good success, virtually identical in performance, and never had any fouling issues or otherwise. Fouling is probably due to a rich fuel mix...

    Tim Daley(MI)

    36 coupe    Posted 11-13-2017 at 16:17:20 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Spark plugs
  • I was cleaning a fence row picking up bits of barbed wire.Put the junk on the carry all.At one spot there was extra junk.The tractor idled a bit longer.When I tried to move the tractor it stalled.Started right up but no power to move.Gradually increased the engine RPM until it smoothed out.Then I could move to the dump area with the junk wire.JD tractors of the B series will stall if idled too long.It happens a lot on parade tractors.There is plenty of bad press on Mexico made champion plugs breaking off in cylinder heads.This was long before Ford had trouble with engines spitting spark plugs.In any case using H10s in Ford tractors will give plenty of fouling.

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