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Case Tractors Discussion Forum
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Case LA spark plugs

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Geoff

09-18-2003 13:51:23




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I recently bought a Case LA regular gas and am beginning to rebuild the electrics, however I have hit a small stumbling block in finding the correct spark plugs. Can anyone pass along a part number for the correct plug for a Case LA?

Thanks




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Glen in TX

09-23-2003 01:17:48




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 Re: Case LA spark plugs in reply to Geoff, 09-18-2003 13:51:23  
Case LA spark plugs

Gasoline, Champion, AC, Autolite,
7/8-18, W14, C75, 3076 or 3075,
18mm, D21, C88, 377,
18mm, UD16, C87, 376,
18mm, D16, C87, 376,

LPG or Natural Gas stationary,
7/8-18, W10, C73, 3074,
18mm, D9, C83, 373 or 374,
18mm D14, C86, 375,

I have the Champions and some of the AC if you can't find them. We also use a Nippodenso M22 instead of the D9 sometimes but won't work on some heads because the hex is larger.

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Geoff

10-06-2003 23:15:17




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 Re: Re: Case LA spark plugs in reply to Glen in TX, 09-23-2003 01:17:48  
This may be a dumb question but what exactly is the difference between the 7/8 and 18mm and is there a way to tell the difference?

Thanks



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Glen in TX

10-07-2003 15:43:12




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 Re: Re: Re: Case LA spark plugs in reply to Geoff, 10-06-2003 23:15:17  
Geoff, This is the thread size of the spark plugs. The 7/8 inch, 18 threads per inch is a special thread used on earlier spark plugs. It is a bit larger diameter that the 18mm (milimeter). The standard automotive 14mm is thus smaller yet. You probably have the 7/8-18 plugs but some later LA's may have used a 18mm also according to my Champion spark plug book. Special taps are available in these sizes to clean the threads out also. If you didn't find the plugs let me know as I have most of them in stock. Good Luck.

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Geoff

10-06-2003 23:09:06




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 Re: Re: Case LA spark plugs in reply to Glen in TX, 09-23-2003 01:17:48  
Thanks for the assistance everyone I really appreciate it.



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RobertTX

09-19-2003 05:41:57




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 Re: Case LA spark plugs in reply to Geoff, 09-18-2003 13:51:23  
The correct Autolite number for the standard compression head is the 3076 indicated in the other post. The propane head uses a small plug, I think Champion D 9 (or equivalent new code I believe is 509). The Autolite is available at the big chain auto parts for about $1.75, The Champion is harder to find, I got mine at a NAPA.



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Baggsy-Wy

09-18-2003 15:37:51




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 Re: Case LA spark plugs in reply to Geoff, 09-18-2003 13:51:23  
Somebody double check me here, but I think it's Champion c75 or Autolite 3076...

Have you got a manual yet? Should be in there...



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