kinda wandering off subject but i run a repair shop(auto) and yes we hate the word tune up.its a phrase that the motoring public has kept around for the general meaning of preventative maintenance.the actuall tune up started in early 1900’s when henry ford and his era of mechanics would listen to the coils buzz and tune tham to a certain sound…oh the good old days.for sake of still being able to “tune”(adjust )carbs,replace points and plugs etc up through the 80’s(ok maybe not points) it still stuck around.dont worry,most of us know what you mean,but we chuckle when we hear it.we are all just happy that everyone knows that maintenance is needed and just dont know what to ask for so we hear tune up.if you have a decent conection at your marina that will set ya up with what needs to be done,i do all of my maintenance on my 50horse 04 merc 2 stroke myself and feel it could be done with minimal mechanical background,but remember if your not sure-dont touch it ask a pro.