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Cletrac Tractor Discussion => All Models Except HG, OC-3, OC-4 & General => Topic started by: Kneale Brownson on October 11, 2014, 08:27:20 PM

Title: What kind of spark plug system is this?
Post by: Kneale Brownson on October 11, 2014, 08:27:20 PM
(http://www.pbase.com/kneale_brownson/image/157779571.jpg)

This is out of the six-cylinder Wisconsin engine used in a Cletrac 40.  The collar at the top holds the ceramic section into the part at the bottom that screws into the head.

(http://www.pbase.com/kneale_brownson/image/157779576.jpg)

This is a closeup of the ceramic section.

(http://www.pbase.com/kneale_brownson/image/157779555.jpg)

This is an assembly of what's left of the plug. The ceramic top with identifications is missing on all six.  The spark tang that grounds on the head is attached to the part that screws in.

Where would I find a replacement plug?
Title: Re: What kind of spark plug system is this?
Post by: Bob on October 13, 2014, 12:38:13 AM
That is a plug that was made to be able to be taken apart and cleaned. Replaced by modern plugs. Autolites work good. Can look up by thread size
Title: Re: What kind of spark plug system is this?
Post by: Blake Malkamaki on October 13, 2014, 04:33:17 AM
7/8" plug. Champion W-18, though I prefer something besides Champion. Older Champions were ok - they were "1 COMM" "2 COMM" "3 COMM" depending on heat range.

Title: Re: What kind of spark plug system is this?
Post by: Kneale Brownson on October 15, 2014, 12:40:36 PM
Found a Champion W14 that fits the threads and is about the same length.

Thanks for the replies.
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