Aruba_Maverick,

You say you are running 15% Cool Power. I have been informed that the Cool Power 15/17 is not lubricating this engine very well. I had numerous problems with mine and had to have the rod and wrist pin replaced due to what looked like a lack of lubrication. I think this engine may need more oil or a different blend or needs to run very rich. The guys here running them with any success are using Magnum 10 and 15%. I dont understand why your plugs are coming loose... never had that problem.
I was thinking maybe 20/20 Cool Power may be the way to go. Yes they can be very tempermental if they get hot. They came out with a bolt on header now that is a plus over the O-ringed header that bolts right on with no mods. Other improvements include more clearance in the rod wrist pin bearing, heat shielded pump, beveled edges on the inside of the carb where the o-rings slide in to reduce the possibility of cutting the o-rings.

As far as milage. It used about 18oz in 15minutes of throttle managed pattern flying. I could fly the advanced pattern twice with a few extra manuvers and have a little over an ounce left on a 20 oz tank. 11+lb airframe(Aries) 17x12 and 17x13 APC.

Wayne G.