📍 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.

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 →

6LPA-STP Series Heat Exchanger.  a “take Off” service and pressure tested of a Heat exchanger for all 6LPSTE series .
Yanmar Parts

6LPA-STP Series Heat Exchanger. a “take Off” service and pressure tested of a Heat exchanger for all 6LPSTE series .

$1,200.00
Contact to Purchase
6LPA-STP Front Cooling Pipe. “Take Off” , in all 6LPseries this is the front square fresh water pipe from Exhaust manifold ( coolant tank) into Cylinder head.
Yanmar Parts

6LPA-STP Front Cooling Pipe. “Take Off” , in all 6LPseries this is the front square fresh water pipe from Exhaust manifold ( coolant tank) into Cylinder head.

$750.00
Contact to Purchase
4LH-HTE Air cooler. Air cooler for 4LH-HTE , this is a 140HP YANMAR marine Diesel engine develop by Yanmar in 1998. The LH series is extremely compact and lightweight; this Air cooler is no longer available through Yanmar. Is a “Take Off” unit been service, pressure tested.
Yanmar Parts

4LH-HTE Air cooler. Air cooler for 4LH-HTE , this is a 140HP YANMAR marine Diesel engine develop by Yanmar in 1998. The LH series is extremely compact and lightweight; this Air cooler is no longer available through Yanmar. Is a “Take Off” unit been service, pressure tested.

$200.00
Contact to Purchase
6LPA-STZP Flywheel Housing for Stern drive application. Bravo Stern drive or Yanmar ZT370. This is a “Take Off” part in a very good condition and we provide also the Quicksilver rear engine Mount Kit for Bravo ZZ.
Yanmar Parts

6LPA-STZP Flywheel Housing for Stern drive application. Bravo Stern drive or Yanmar ZT370. This is a “Take Off” part in a very good condition and we provide also the Quicksilver rear engine Mount Kit for Bravo ZZ.

$1,900.00
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.