I am not sure but should be around .014. I can tell you you can do more damage to a new set of points by using an incorrect or dirty feeler gauge, it should be a brass feeler gauge, anymore I do an eyeball comparison to keep from contaminating the contacts with anything even the brass one. I remember one old timer always used to tell me the thickness of a paper matchbook cover was perfect. Something else you might do is take a 14mm spark plug that the electrode is even with the bottom of the threads cut off the ground tang, hook up and ground the plug, a good hot mag should jump that gap easily,( you can buy them as well with a clamp) if not, you can crank till the cows come home and wear yourself to a frazzle or worse yet, hurt your arm.

Revising an old thread! I just got my Wico Mag back from OLD CROAK MAGNETOS and I was amazed at the service they gave me and the very reasonable price. They also sent me a load of information in several emails. It turns out that .015" is stamped on the inside of the mag, so that settles that question. I dont know if Eismans also has it indicated or not. Next week my pony mag from my D4 goes in the mail to them. Grant.

Grant J,

I have an electronic version of the 22 operators and 22 parts books. If you think you want them or they might be of help PM me with your email and I'll send them to you.

Good Luck

Biggastractor

Biggastractor, I have a parts book but I think that I am short of the operators book. I will look tomorrow and let you know. I really appreciate the offer. Grant.