If there's a Yamaha on your transom, you want the same thing every boater wants: a technician who diagnoses the actual fault instead of swapping parts until something works. That's how we approach every Yamaha outboard that comes through — at your dock, not a shop across town.
ABYC-standard diagnostics on Yamaha outboards
Our lead technician holds ABYC Certified Master Technician credentials — the standard that governs correct, safe marine engine and electrical work across every brand, Yamaha included. We're a Mercury Marine Certified Technician by factory certification specifically, and we service Yamaha outboards regularly as part of our day-to-day mobile work throughout Key West and the Lower Keys.
Every Yamaha job starts with proper diagnostics — compression and fuel pressure testing, electrical and charging system checks, and a real look at what's actually failing before anything gets replaced.
Yamaha services we provide
Scheduled Maintenance
- Routine service intervals (oil, filters, water pump impeller, spark plugs)
- Annual winterization and spring re-commissioning
- Pre-purchase inspection on a used Yamaha outboard
Diagnostics & Electrical
- Fault diagnosis on no-start, stalling, and rough-running Yamaha outboards
- Charging system and battery diagnostics
- Wiring and connector corrosion repair (saltwater takes a toll on any brand's harness)
Lower Unit & Cooling
- Lower unit inspection, gear lube service, and seal replacement
- Water pump (impeller) replacement — the most common cause of overheating
- Cooling system flush and thermostat service
Fuel System & Powerhead
- Fuel system cleaning and testing
- Carburetor or fuel injection troubleshooting
- Compression and leak-down testing, powerhead repair on high-hour engines
Mobile means no haul-out
We bring the diagnostic tools and common parts to your dock, slip, or lift — anywhere in Key West, Stock Island, Big Coppitt, Sugarloaf, Cudjoe, Summerland, Big Pine, or Marathon. No towing, no shop queue, no lost time on the water.
Book Yamaha service
Call or text (305) 832-1206, email info@3marinekw.com, or book online.
Keep your boat in the water. We'll come to you.