If it might get stored for a long time, I would empty the fuel out of the carb and shoot some WD-40 into all the carb orifices. Then plan on replacing the fuel pump and regulator diaphragms when you next use it. As for the engine, I would dribble some automatic transmission fluid into the carb throat and spark plug hole. Stick the plug back in and flip the engine over numerous times to disperse the ATF inside. If you're anal like me, do this twice. I have gas and glow engines that I have treated like this that are 30 years old, have never been apart, and run like new.

Oh, then wrap the engine in clean rags, (old T shirts work great), then put it in a box and tape it shut. Store somewhere dry. Done deal.

AV8TOR