Marine Services
Mercury Certified · Mobile · Key West to Marathon
Full-Service Mobile Marine Repair
3 Marine Mobile KW brings the shop to your boat. Whether it's a routine Mercury service, a blown head gasket, or an electrical gremlin that's been chasing you for months — we diagnose it, fix it, and get you back on the water. No waiting room, no tow bill, no drama.
We service outboards, inboards, sterndrives, and marine diesels. Residential docks, marina slips, mooring fields — wherever your boat lives, that's where we work.
Mercury Diagnostics & Repair
CDS G3 computer diagnostics, factory-scheduled maintenance (100 & 300-hour), lower unit service, fuel system repair, and powerhead rebuild. Mercury certified — not just familiar with the brand.
- 100 & 300-hour scheduled service
- CDS G3 electronic diagnostics
- Lower unit rebuild & gear lube
- Fuel system cleaning & repair
- Powerhead overhaul
Engine Repair & Overhaul
Compression testing, leak-down analysis, head gaskets, cooling system rebuilds, and full powerhead overhauls. We work on gas outboards, inboards, sterndrives, and marine diesel.
- Compression & leak-down testing
- Head gasket replacement
- Cooling system rebuild
- Powerhead overhaul
- Marine diesel service
Marine Electrical
Battery banks, charging system diagnosis, wiring repair, electronics installation, nav lights, bilge pumps, and shore power. Electrical faults traced methodically — not by gut feeling.
- Battery & charging systems
- Wiring diagnosis & repair
- Electronics installation
- Navigation light service
- Shore power hookup
Need service today?
Certified mobile marine service throughout the Keys — we come to your dock.