ORIGINAL: arobatx

If you are relatively new to gassers, I would recommend mounting the engine on a test stand to familiarize yourself with the fuel system and needles. It will offer a safer, more straightforward setup to get used to how things work. Also, this provides an initial troubleshooting step already taken before mounting your setup into the plane. If, when you mount things into the plane you notice problems, it is easy to deduce what may be different as compared to your test stand setup. Again, I would only recommend this for those newer to gas engines...and even then, would only leave the engine mounted in this way long enough to familiarize yourself with how things work, and get the needles set appropriately. Beyond that, I see more of a chance for harming the engine on a test stand than I see helping it....especially in respect to the dissipation of of vibration, and cooling. If you are already familiar with gas engines for our hobby, run a good break-in oil, tune the carb correctly and fly it. The std 10-15 min flights with cool down in-between, varying the throttle and load, will offer very good heat cycling during the ring seating process.

Chad