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Fouled plugs

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tom

12-28-2002 21:48:00




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i have a 52 JD A that i pull and the plugs keep fouling out (burnt)just after maybe 2 pulls down the track iam using champion d16 plugs can anyone help me




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Dan

12-29-2002 13:19:15




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 Re: fouled plugs in reply to tom , 12-28-2002 21:48:00  
I worked for a JD dealership for years as did my Dad, we usuually used the Champion D23 on the As and Bs. TThey are a long base plug and though the Autolite has a cross over that is supposed to be the same it doesn't seem to work as well. D23s are expensive so you are lucky you have 2 holes. Don't know about pulling this was for farm work



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Ron

12-29-2002 08:48:12




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 Re: fouled plugs in reply to tom , 12-28-2002 21:48:00  
You say you pull the "A".so I guess you have raised the compression...?? You stated that you find "Burnt plugs".... You may have to check the advance curve...you may have too much timing advance at the RPM you are demanding full power.... My "60" had entirely too much...pulls twice as good now that I installed heavier advance springs... If you are using a Mag, you may need to retard the Mag a little... Lean mixtures will burn up plugs (and valves), too....!!

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Lary

12-29-2002 08:19:36




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 Re: fouled plugs in reply to tom , 12-28-2002 21:48:00  
Switch to Autolite plugs, we did, made a world of diff. Lary



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John T

12-29-2002 07:56:43




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 Re: fouled plugs in reply to tom , 12-28-2002 21:48:00  
Tom, when yoy say fouled out, are the plugs a flat black sooty color, or a wet shiny black color, or are they actually very gray and like burned up??? Are you running high compression?? Are you runnign some sort of exotic fuel?? What kind of ignition are you running??? The plugs and their condition are the messenger of whats going on inside, so dont fault the plugs just yet. If youre just runnign a regular tractor and not pulling, the first thing I would tell you is to run a hotter plug like an Autolite 386 or 388 if you are wet or carbon fouling, the D16 Champion is often not hot enough and a D23 Champion (but I prefer the Autolite 388) is more like it dependign upon the use. A weak ignition can also cause premature plug failure, but if the plugs are fouling after only 2 pulls, I really suspect you are over fueling the tractor and excess unburned fuel residue is building up on the plugs. Let us know more and we will try and help. Ol John T Nordhoff in Indiana

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gene

12-29-2002 07:09:39




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 Re: fouled plugs in reply to tom , 12-28-2002 21:48:00  
your problem is the d16. i have had tractors were they didnt even get out of the shop before the d16 quit workin. i use only AC 88l's or the only champion i have found the is worth anything is the D23. the D16 dont even make good paper weights. johndeeregene



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ChuckW

12-29-2002 06:01:03




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 Re: fouled plugs in reply to tom , 12-28-2002 21:48:00  
Reason: Old engines with low temp for current blend of unleaded gas. Too low iginition output(need electronic).



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Clooney

12-29-2002 05:01:07




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 Re: fouled plugs in reply to tom , 12-28-2002 21:48:00  
Tom, the information you furnished is a little confusing. You say "the plugs keep fouling out (burnt)", are the plugs fouling out [black soot, wet fuel, wet oil, etc.]? Or are they burning [melted electrode, larger gap, signs of overheating]?
~If they are fouling from fuel or oil & turning black then you are fighting a weak ignition, wrong ignition wires, or rich carburetion, or poor sealing piston rings, or too low a heat range spark plug, or fuel additive problem, or plugged air cleaner/intake. ~If they are burning, then you are fighting a lean carburetor, or lack of fuel flow, or low fuel octane, or over advanced ignition timing, or too high a heat range spark plug.
~What are you running for engine specs, compression, ignition timing, carburetor, type of mag/distributor, air cleaner, any other engine modifications?
~What are you running for fuel? Any fuel additives being used?
~Let us know what you have, & what you are running, & what exactly is happening to your spark plugs, then we can probably help..... .

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snowmantn

12-29-2002 01:14:43




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 Re: fouled plugs in reply to tom , 12-28-2002 21:48:00  
Tom I have a 1951 A and it does not like the Champions or the AC plugs as well as Autolites. The tractor has new or rebuilt everything and timing is right on the money. Just one of the great mysteries of these beauties. I am sure other folks have tractors that may respond differently though. Good luck with the A!

snowmantn



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Will P

12-28-2002 23:03:43




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 Re: fouled plugs in reply to tom , 12-28-2002 21:48:00  
Get rid of the Champions. Put in Autolite 386's You will love them.

Will P



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