Having ran THAT particular plug in THAT particular engine for 2+ gallons at a time..... I would say it worked out pretty well. I just pulled out my old Force manual(as I keep most of them) and NO where does it say NOT to use an OS plug.

This is the 2nd time I have seen you post that about OS plugs. OS plugs WILL work with all makes of engines .....plain and simple.
If you look at OS's site... it even states it will work in .12 to .21( 21 = BB)

The mccoy 8 is a medium-hot plug....the os#8 is a medium-hot plug.


I sent of an email on this subject to a few engine manufacturing companies and plug companies... if I get replies... Ill be glad to share them..