run stabilized fuel through motor
have fuel filled right to the top so no condensation happens
change lower oil and seals
change upper oil
change oil filter
pull plugs, spray fogging oil in, crank with battery for a sec
take weight off tires with axle stands
put motor in down position
pull the batteries and store them indoors
pull boat drain plug and have boat on slight angle so any water that gets in can drain
tarp boat up at the side of the house and hope for the best (I leave motor "untarped" so no condensation forms)
...this has been working for me!