that oil you leave in your motor will GUM IT UP. i got a few motors from a guy that were improperly stored for a yr or so, Major clening needed to be done, and it took over 2 hrs per motor just to clean up enough to even attempt to start, let alone be ready to do in 20 minutes. do the storing methods mentioned. you ll be glad you did. not to mention the bearings will get bad due to the extra moisture pulled in if you leave your motor full of fuel. its 5 minutes now or more than 5 minutes later. your choice.
Timmahh