....ideally the engine should be run at the end of the day with the fuel line removed,
the tank emptied, remove the vent line to the tank, and open the carb fully. Applly
the glow and hit it with the starter. It will only run for a few seconds.

This burns the residual methanol from the carb and crankcase in a two stroke. The
methanol is what attracts the moisture that causes the rust. This will also suck any
residual from the carb as well. The castor oil will remain behind to protect the steel parts.

Now close up the carb, and plug the exhaust to prevent moisture (humidity) from
getting to the inards of the engine. There are some neat rubber carb covers that
seal the carb real nice from moisture and dirt.

I have always plugged my exhausts at the end of the day to keep the oil from dripping
out at unwanted times. I have never had a bearing rust in 36 years. I use to live in the
Harbor of Los Angeles where the salty marine air will rust and pit almost any metal
including aluminum in a short period of time.

FBD.