I took my Johnson 9.9hp here last year, they rebuilt the carb, changed the plugs and changed the lower unit oil for 315$! They will work on most motor companies, they are a mercury mechanic and there prices are affordable to me, they are specialized in small motors. They are located in the Worcester Area, about 35 Mins from Natick/Framingham. They also do it in a very timely manner, I got my motor back in 6 days.