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John Deere A plugs

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DJ

11-01-2002 04:55:59




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I recently had my "A" tuned at a dealer. It started fast and ran great. That only lasted for maybe an hour of running time, then it died. It would not start again. I installed 2 new plugs and it started right up. I have tried Champion, Delco and auto lite plugs, same thing. Carb is adjusted so it sounds good, not sputtering or spitting, but then black smoke comes out of exhaust, when running. Do I need hotter plugs or hotter spark? Tractor has Delco Distributer.

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Bob in NH

11-04-2002 18:42:36




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 Re: John Deere A plugs in reply to DJ, 11-01-2002 04:55:59  
How did it run before you took it to the dealer for a tune-up? What was done during the tune-up? (i.e. parts changed, adjustments made). If it wasn't doing this before the tune-up, then something the dealer did or changed is probably causing it. Did the dealer return the old parts to you? Back-tracking should lead you to the cause rather than changing out more parts. Just my 2-cents worth. (And why I always keep the old parts).

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rex

11-01-2002 15:05:10




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 Re: John Deere A plugs in reply to DJ, 11-01-2002 04:55:59  
dj all fo the previous replys are very good advise . but i have an A and it had the same problem . and my remedy to the problem was the gasoline. my A will not run long on regular unleaded gas . so u have to use hi-test gas. now it runs just fine.



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Darrell

11-01-2002 14:39:18




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 Re: John Deere A plugs in reply to DJ, 11-01-2002 04:55:59  
Sounds like a bad condenser to me. The time it takes to change the plugs,it cools down and restarts



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Jerry S

11-01-2002 10:10:29




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 Re: John Deere A plugs in reply to DJ, 11-01-2002 04:55:59  
Kind of sounds like the ordeal I had when I learned about how the hornets like to nest in the intake air stack. Took the whole mess apart and water hosed lots of mud, nest, and bugs out of it. Clooney and John T suggest taking the air intake part off the carb and running it to make sure that isn't the problem.



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DJ

11-05-2002 04:36:39




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 Re: Re: John Deere A plugs in reply to Jerry S, 11-01-2002 10:10:29  
Thanks, I'll try all the suggestions and let you know what happens. DJ



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Ol John T Nordhoff

11-01-2002 06:59:07




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 Re: John Deere A plugs in reply to DJ, 11-01-2002 04:55:59  
DJ, if shes running black smoke out the stack the carb is running too rich (or maybe choke plate isnt opening or air cleaner clogged) which very quickly gas fouls the plugs with that flat back sooty coating. I think you may not need hotter plugs or spark as you asked, but to lean out your carb settings. Have you tried leaning (turning in) the load carb adjuster??? Is the choke butterfly plate opening and closing all the way??? Is the air cleaner clean and open??? Once you try all that post back and let me know because 1 of those 3 may be your problem. As far as the plugs, I prefer Autolite 388 in styled and 3077 in unstyled. What shape are the points, condensor, cap and wires in??? because if those are bad, youre running a weak spark which also quickly fouls out a good set of plugs. Good Luck, Ol John T Nordhoff in Indiana

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AC

11-03-2002 04:20:03




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 Re: Re: John Deere A plugs in reply to Ol John T Nordhoff, 11-01-2002 06:59:07  
Beware of the Auto Lite 388 and like plugs...darndest thing happened to me....they thread in so far on my 40 and 46 A's , nothing can get on it to break it loose when you want to take it out..... ..... .getting my two pennies in



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CJDave

11-01-2002 05:53:35




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 Re: John Deere A plugs in reply to DJ, 11-01-2002 04:55:59  
I don't have a clue as to why this is, but even when we farmed with JD A's in the fifties on a regular basis, they were "plug sensitive". If we put Shell gas in our '41 AW it would run for maybe an hour and then quit until we bought new plugs. That was always a mystery to me; even at the ripe old age of fourteen.



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