Hey Stumpbumpers:
I have a 140 Suzuki and do the oil change myself. Your owner's manual has step by step instructions and there isn't much to it - about like changing oil on a riding lawn mower. There are also instructions in your owner's manual for resetting the oil change notification system built into your tac. It keeps track of your oil change intervals and lets you know when it's time to change. Also keeps track of the hours on your engine - pretty neet system.