Ed Miller is a mobile mechanic who knows Yamaha motors inside and out. He is based in Essex, but he can provide service on your engine at your site for an extra fee. I have used Ed for winterization the past two years, for replacement of my steering system, and for repairing the tilt/trim motor on my 70-hp Yamaha 2-stroke.
You can reach him at 410-375-1638.
I would not hesitate to have the Tri-State service department perform that type of work either. They did good work for me for many years.
Scout 162 Sportfish, Native Watercraft Manta 14