I'm sure this topic has been addressed here before.  If it has, my apologies as I didn't see it.

Some recommend using an idle bar plug in engines that are mounted inverted.  Some say they never use idle bar plugs for C/L engines no matter how they are mounted.

Any thoughts on this subject from the Hanger crew?

Thanks,

Joe

I use a thunderbolt RC plug on all of my stunt engines. Like Randy says the hot plug runs better with high caster fuel. What I like about them is the plug will tell you when it's life gets close to the end. With engine started and running and you take the starting battery off the RPM will drop. Time to replace. I have had same plug in my Grinder for 2 years now. I suspect it will soon let me know that its had it.