we have a 21ft with a mercuy v8 118 hrs power. it was stored for 5 years and after removing the old gas out of the boat. while trying to start it after new plugs and wires, it is back firing through the carb and it smells like exhaust . it just recieved this baot next to nothing . or is there a mechanic around the beaver creek area, dayton. it is not firing also. thanks .