Hopefully, thats a new engine and not leaned out yet. [X(]

I'm an avid G-62 user, as you may well know Larry. I don't have a single one ( I have 3 right now) that won't turn most 22-10 props over 7100RPM. Only one that slows my G-62 engines down is the Bambula 22-10. I get about 6300RPM out of those, if memory serves me correctly.

NX 22-10 are up in the 7200--7300RPM range
APC 22-10 is pushing 7500RPM
MSC 22-10 is about 7100--7200RPM
Pro Zinger 22-10 7200--7300RPM

Mine are basically stock. C&H ignition of RCIGN1 ignition units. Pitts style muffler. 40:1 Husky oil and 87 octane gas. Needles tweaked for max and then fattend up about the thickness of the adjustment slot in the top of the screw. Maybe 1/10th or 1/8th turn rich.

I'm up at 5973' elevation right now.

The engines actually should turn the same RPM as sea level. Air is less dense, so prop resistance is less. We get same RPM as the guys at sea level--but we're actually giving up about 20% thrust because of the thinner air.

Say Hi to the Italian Air Force for me. I'm sure they miss me.