Our method is the same... sort of.
Run the engine to temp (160)
Shut down and drain engine of water
Run -100 rv/marine antifreeze throught the engine with rabbit ears... no pump needed (we use a 5 gallon tank; gravity fed from the swim platform)
While engine tank is draining... spray fogging oil in the air intake for the last bit of the running cycle...
Shut engine off when the antifreeze tank is empty.
Drain the outdrive gear lube and refill.