Q: Will this Compression Tester Extension 12MM work on a Rotax engine? 12mm x 1.25mm Threads
Yes, it will work on a Rotax.
Q: What size does the O-360 series typically take? I purchased the 18MM and it is the wrong size.
o-360's should be 18mm. If you have automotive plugs it would be 14mm.
Q: Will this compression tester extension 12mm connect to compression tester model 2EM part # 12-02346?
Yes, it will.
