Mechanic Job in Beverly, Massachusetts

I have a 25' SeaRay on a trailer in my yard in Beverly, MA that I'd like to get into the water by July 7, 2014
It has a GM 350 V8 260 hp Mercruiser wiith an Alpha-One out-drive.
I looking for a mechanic to do the prep work: Change the plugs, set the timing, draining the coolant, etc...