AC plug question

[Mike Cobine]

I bought a set of AC R44N that are supposed to be new. However, pulling the first out of the box had a brown color around the insulator where the R44N is, similar to burnt oil. The tip, threads, and cone were spotless and no signs of ever being installed.

Pulled a few more and they had a brownish-reddish substance on the insulator. Threads spotless, no signs of ever been installed. Same under the elctrode and down around the cone.

Anyone ever see this on new plugs?

[Dave S.]

Re: AC plug question

Mike,
The color and descripton of what you have is common to spark plugs that have sat on the shelf for a long time. Simply wipe that off with Simple green or a similiar cleaner and you will have a nice looking set set of plugs that will last for years.

[Mike Cobine]

Re: AC plug question

Thanks,Dave.

It wiped right off, but I've never seen that on any, and I have some that are so old, the boxes are brittle.

Mike

[Dave S.]

Re: AC plug question

Mike,
Its something that shows up once and a while and I can't understand where it comes from either. It seems to happen to plugs that are stored properly as you never seem to see it on plugs that show amy storage damage.