Answer to Walt:
Both needles are set rich at about 2 turns out. Original factory settings were 1-1/2 turns.

Answer to Bob:
I get a lot of mixed information on Octane. I have found very little difference between grades in my G-62 planes. Low test seems to make the engine zippy (more responsive rev-up). High test seems to run smoother, with more torque. Most flyers I've talked to use Ams Oil 100-1 (synthetic) at 100:1, and non-synthetic at 50:1.

Answer to JMHO:
I did some research on the CF intake and it seems to solve the bog-down on rolling, knife edge, and inverted flight. I will try it when I get my new problem below fixed. Thanks

The problems are growing. Here's an update:
Last night I cleaned lots of black build-up out of the mufflers. I also removed the static port vent hose. There were no bog-downs in the rolls on my first flight today. But here's the bad part. I did not get a chance to test inverted flight, because the engine nearly quit on a full throttle vertical climb. It also happened yesterday with the static port vent hose attached. This was definitely caused by fuel starvation. I richened the low end from 1-7/8 turns to 2-1/8. There was an occasional burble on the rolls during the second flight. After verifying that it could sustain full throttle level flight, I tried the vertical again, and it quit. Again, this was definitely a fuel starvation shut-off

I disassembled the fuel tank to check for air leaks in the pick-up line, but found none.

This engine ran good for over 30 flights, then the inverted quitting problem started. Now it runs out of gas on vertical climbs. The problem seems to be in the carb, and it is getting worse.

I plan to install a new carb kit.

Thanks for the advise.