Mercury Diagnostics & Repair
Mercury Certified Technician · Mobile Service · Key West & The Keys
Mercury Certified. CDS G3 Equipped. On-Site.
If your boat has a Mercury on the transom, you want a technician who actually trained on them — not someone winging it with a generic service manual. Our certified Mercury technician works with the same CDS G3 diagnostic software Mercury dealers use. The difference shows in the diagnosis and in the repair.
Every Mercury service we perform — from a routine 100-hour to a full powerhead overhaul — is done to Mercury factory specifications. We use genuine OEM parts, record service history, and can pull Mercury diagnostic trouble codes to find problems that visual inspection misses.
And we do it at your dock. No tow, no haul-out, no waiting at a crowded shop. That's the only way 3 Marine operates.
Mercury Services We Provide
Scheduled Maintenance
- 100-hour service (impeller, gear lube, filters, anodes, spark plugs)
- 300-hour service (full fluids, belt inspection, thermostat, complete inspection)
- Annual winterization & re-commissioning
- Pre-purchase inspection
Diagnostics & Electronic Systems
- CDS G3 computer diagnostics (same software as Mercury dealers)
- Fault code retrieval & root cause analysis
- SmartCraft gauge and network diagnostics
- Throttle & shift control calibration
Lower Unit & Gear Case
- Lower unit removal, inspection & rebuild
- Gear lube change & leak diagnosis
- Prop shaft seal replacement
- Water pump (impeller) replacement
- Gear ratio testing
Fuel System & Powerhead
- Fuel injector cleaning & testing
- High-pressure fuel pump replacement
- VST (vapor separator tank) service
- Powerhead overhaul & rebuild
- Compression & leak-down testing
Need service today?
Certified mobile marine service throughout the Keys — we come to your dock.