Diesel Engine Routine Maintenance

We handle routine maintenance and peripheral work on all the major inboard diesel brands—Volvo Penta, Yanmar, MAN, John Deere, Detroit Diesel—but we no longer take on diesel engine tear-downs or major diesel repairs due to the mobile nature of our company. Our diesel services in the Lower Keys now focus on essential upkeep like fluid changes, filter replacements, inspections, and basic system checks to keep your engines reliable. For anything beyond routine maintenance, we’ll point you in the right direction.

Marine Diesel Repair Services

  • Cooling Circuit Flush

  • Alternator Troubleshoot and R&R

  • Alternator Belts

Call 786-438-7853

Marine Diesel Maintenance Services

  • Oil and Filter Change

  • Primary and Secondary Fuel Filter Change

  • Transmission service

  • Zinc Replacement

  • Replacement of Belts

  • Diesel Generator Service

  • Impeller Exchange

  • engine pulleys

    Diesel Regular Maintenance

    Give us a call for your regular oil and filter changes on all brands of inboard diesel and gas engines.

  • Justin with dad glare

    Mobile Professional technicians

    That show up to your boat with that “Dad smolder” look. And get stuff done.

  • Diesel

    Diesel Diagnostics & Repair

    Our techs have years of combined experience diagnosing Mercruiser issues and conducting regular maintenance.

  • ABYC master tech

    ABYC Trained Techs

    Many of our techs are ABYC certified Master Technicians. Old Town Marine is a member company.