Hi all there
I hope that your M20 runs with no problems, as mine does.
I was hoping that someone off you may have some further info for a Lodge spark plug,that i have recently discovered.
The metal box external has a paper label with the Following text written on it

AERO
Rotary Cylinders
METRIC THREAD


On the spark is written

LODGE ROTARY R.F

Here is some photos








If any off you have any info like Production periods or in what king off engines use to install that king off plugs will be highly appreciated.

Thank you

Petros

email (option): tsirvoulis@hotmail.com

http://www.pilotfriend.com/training/flight_training/tech/rotary.htm

Lots of other choices too.

email (option): unpob@yahoo.com

Henri thank you for your reply

However i don t have manage to find any spark plug info
in this site.
To be more accurate i am looking info for this specific Lodge Spark plug ( manufacturing period,engines using this plug etc).

Thanks anyway

email (option): tsirvoulis@hotmail.com