I guess you could say this if you install the motor the correct way(as recommended, right side up). When it's inverted you have more fuel seeping into the motor which if your burning a hotter plug it will burn up the fuel faster which would keep it from flooding. Then you would have to ask yourself, Why use an on board glow system? Remember these motors 2 or 4 stroke were not design and built to run inverted.

Billd76, in your first post you stated that you couldn't get the motor started because it was too tight then you went on to mention that you didn't want to remove the plug to start it. Tight engine would suggest to me that your motor is filling with fuel before you even go to start it. Lowering the tank would prevent the fuel from seeping down at a constant rate to your motor. You can always start the plane inverted and then flip it over and it should stay running unless it starts to flood out and dies which take us back to a hotter plug.