Don't know any mechanic in that area however I have had that problem among others on motors. With something like that it always turned out to be fuel related. First thing I would do is the basics...make sure the tank, fuel line and filters are clean and fully operational and it has clean gas. Next thing would probably be remove the carbs and clean them throughly, installing a rebuild kit which should include needle tip, needle seat, O ring for jets etc... Also, just for kicks, do a compression test just to make sure you are working with a solid powerhead.I need a good mechanic to look at my suzuki 150 two stroke. It is having trouble starting when it does start it idles rough and when put in gear dies. I'm stationed at camp lejeune. Please contact me if you know anyone or have had this problem yourself.