📍 1350 Oceanview Ave, Marathon, FL 33050 📞 (305) 743-7116  |  Mon–Fri 8am–5pm (Closed 12–1pm)
Marathon Diesel Repair — Serving Marathon and the Florida Keys since 1990

What We Do

Full-service marine diesel repair — in our shop or at your dock

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Marine Diesel Repair

Complete engine diagnostics, repair, and reconditioning for Yanmar diesel engines up to 750HP.

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Suzuki Outboard Service

Authorized Suzuki Marine dealer — full service, parts, and warranty work on Suzuki outboard engines.

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Mobile Service

We come to you. $55 service call + $200/hr labor. Dockside, marina, or wherever you are in the Keys.

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Engine Reconditioning

Remanufactured marine diesel engines available for sale. Ask about our current Yanmar inventory.

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Parts Sales

Largest Yanmar parts inventory in the Florida Keys. Suzuki parts also in stock.

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Water Access

Accessible by boat — end of the canal between Pancho’s Fuel Dock and Burdines Marina.

Recent Parts for Sale

Updated as inventory changes — view all parts →

YANMAR 4LH-STE Injection Pump, 719175-51300
This is a “Take Off” pump, tested and calibrated at injection shop, this pump is for a four cylinder Japanese model 4LH-STE 230HP @3300rpm.
Yanmar Parts

YANMAR 4LH-STE Injection Pump, 719175-51300 This is a “Take Off” pump, tested and calibrated at injection shop, this pump is for a four cylinder Japanese model 4LH-STE 230HP @3300rpm.

$4,000.00
Contact to Purchase
This is an standard Crankshaft for a Yanmar marine engine 6CX530, the part number is 727677-21500 and retail new  for $14,731.00, this crank it been storage safe and straight resting in the flywheel , perfect for a reuse or replacement.
Yanmar Parts

This is an standard Crankshaft for a Yanmar marine engine 6CX530, the part number is 727677-21500 and retail new for $14,731.00, this crank it been storage safe and straight resting in the flywheel , perfect for a reuse or replacement.

$6,000.00
Contact to Purchase
Yanmar 6LY2A-STP Crankshaft. This is a “take Off” standard crankshaft for YANMAR 6LY2A-STP 440HP, the crank is very clean in standard conditions
Yanmar Parts

Yanmar 6LY2A-STP Crankshaft. This is a “take Off” standard crankshaft for YANMAR 6LY2A-STP 440HP, the crank is very clean in standard conditions

$5,000.00
Contact to Purchase
4LH-STE , Exhaust Manifold / cooler core.
This is a “Take Off” part service and tested
Yanmar Parts

4LH-STE , Exhaust Manifold / cooler core. This is a “Take Off” part service and tested

$2,000.00
Contact to Purchase
💳 Payment Options:
🤝 Local Pickup — Pay on arrival
📱 Zelle — Fast & easy transfer
💳 Stripe — Scan QR code to pay
📍 24.7046° N, 81.1090° W ⚓ Marathon, Florida Keys Open in Google Maps
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Marathon Diesel Assistant

Ask me about our services & parts

Hi! Ask me anything about Marathon Diesel — services, rates, hours, Yanmar or Suzuki parts.