Keys Marine Service is a mobile boat repair and maintenance company providing on-location marine technician services, including repairs, installations, and maintenance for boats and yachts between Key Largo and Marathon Key, Florida, and up to Key West from their Stock Island facility. They specialize in outboard/inboard engines, diesel engines/generators, hydraulics, electrical systems, A/C & refrigeration, plumbing, fiberglass & gel coat, and detailing & washing, serving both private owners and businesses 7 days a week.