San Diego Boat Parts & Repair Services

Coleman Marine Diesel is a family-owned and operated marine diesel and repair shop on Shelter Island, CA known for its quality boat repair services and full catalog of engine parts. Whether you need a full engine overhaul or are just shopping for some spare parts, our friendly staff is ready to assist you with all your engine needs. Visit our shop or give us a call today.

Engine Repairs


Engine Overhaul

Sometimes a major overhaul is needed, or a complete "rebuild."  All major parts and systems are gone over; whatever needs to be done, gets done!  


Engine Repair

We inspect, test and maintain marine diesel engines.


Preventative Marine Engine Maintenance

Regular and routine maintenance of equipment and assets help keep your boat running and prevent costly unplanned equipment failure.


Pre-Purchase Surveys

A thorough inspection of a boat's structural and watertight integrity, system's installations, and operating conditions, as well as performance.

What People Are Saying

Don’t just take our word for it. Take a look at our verified Google Reviews.

Factory Authorized Warranty Dealer