I have an I/0, a jet and 2 OBs that are "daily drivers". Right now, all have had their batteries pulled, the upholstery is detailed, the hulls are waxed, the tires are pumped, the bearings are repacked, the gas tanks are topped and stabilized, the lower units are drained and refilled, the covers are on and they are snug as a bug in the boathouse. I could have any one of them back in the water in the 10 minutes it would take to re-install the battery. Then after running they would all take about the same time to pull the battery, polish the hull, repack the bearings, check for water in the lower unit, yada yada.