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Re: MECO spark plugs, DON'T BUY THEM

Posted: Sun Jul 17, 2022 4:36 pm
by Murf
How about someone post the Champion Spark Plug
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Re: MECO spark plugs, DON'T BUY THEM

Posted: Sun Jul 17, 2022 4:56 pm
by Elwood
There are at least three Champion plug numbers that will work in the OEM military shielded system (the supercede part number is in parens):
- 514 (XEJ-8) - cold / medium temp range
- 588 (XMJ14) - cold temp range
- 573 (XMJ20) - standard temp range (?)

There might be other Champion plugs, along with similar plugs from Autolite.

Re: MECO spark plugs, DON'T BUY THEM

Posted: Mon Jul 18, 2022 2:36 am
by MSeriesRebuild
The 573 or XMJ20 are the ones that have worked best for us.

Re: MECO spark plugs, DON'T BUY THEM

Posted: Mon Jul 18, 2022 3:15 am
by Murf
Thanks to both of you!

Re: MECO spark plugs, DON'T BUY THEM

Posted: Mon Jul 18, 2022 9:09 am
by deltaracer
States heat range for Champion 573 (XMJ20) is---20