ORIGINAL: skippyspad
What are you out by running a few tanks of fuel through rich then setting the carb? A few bucks worth of fuel? Option 2 is to pull the engine out of the box, mount and fly and risk seizing an engine or overheating and screwing up several hundred in an engine and possibly loosing a plane.
I'll use a few bucks of fuel.
Mike
That is why I run on a test stand before I fly. I have never damaged an engine yet doing this and I have engines that are as old as 50 yrs. The only dead sticks I've had were due to a bad plug or running out of fuel. I do what Ole Duke used to say, I keep my engines clean and not too lean. I believe in using engines that are above minimum size recommended so I don't have to run the pewaddle out of them.

I have a Traxxas 2.5 with over 15 gallons on it so far as a result of my tuning and it has all original innards still.[X(]