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Spark plug question.


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#1 adamjd200 OFFLINE  

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Posted June 03, 2016 - 01:34 PM

Does anyone have a good breakdown of what spark plugs have removable tops and threaded studs underneath like those used on old Briggs and Stratton engines, as well as the thread size?  Looking for the tread size for the top on a J8c, as I would like to order some nuts for on my old Briggs and Strattons. 


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#2 boyscout862 OFFLINE  

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Posted June 03, 2016 - 03:39 PM

I used to just steal them from old plugs because the new ones would sometimes not have them. The tops were loose and the plastic wraps of the plug packages often leaked. Good Luck, Rick


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#3 WNYTractorTinkerer OFFLINE  

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Posted June 03, 2016 - 04:05 PM

Either 6-32 or 4-40..  Been a while since I saw one..


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#4 DougT ONLINE  

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Posted June 03, 2016 - 06:18 PM

I know I've seen them with different sizes. One nut won't fit the same plug. that's where a good thread guage comes in handy.


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#5 adamjd200 OFFLINE  

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Posted June 03, 2016 - 09:59 PM

I know I've seen them with different sizes. One nut won't fit the same plug. that's where a good thread guage comes in handy.

That may be why most nuts I have seen for this application seem to be made to fit a little loose,



#6 JBRamsey OFFLINE  

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Posted June 04, 2016 - 09:01 PM

Take the old plug to the hardware store and see what fits.

#7 KennyP ONLINE  

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Posted June 05, 2016 - 06:48 AM

If I had one laying about, I could probably figure it out. Probably a 6.



#8 adamjd200 OFFLINE  

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Posted June 05, 2016 - 10:20 AM

Take the old plug to the hardware store and see what fits.

That would work, except everyone around here only sells this small stuff In packs of 20+, no one sells anything under 1/4" loose, I could dig through my personal stash, the nuts I plan to order are brass thumb nuts. 



#9 FixItCharlie ONLINE  

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Posted June 05, 2016 - 12:31 PM

Some wire strippers also have the ability to cut small screws. I have used these to find the size & thread for small threaded items.

 

Charlie


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#10 adamjd200 OFFLINE  

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Posted June 07, 2016 - 02:21 PM

Figured it out, J8c is 8-32 for the top, just so happened to find a pack of 8-32 hex nuts while looking for something and tried them on a whim.


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