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Services by Casco Bay Diesel

Diesel Engine Repairs in New England

Diesel Engine Diagnostics

Make sure everything is running as it should with our diesel engine diagnostics – getting to the root of the problem.

Industrial off-highway equipment

Mobile and on-site services, making sure your equipment is working correctly again and optimized for performance.

Fuel injection service

Get the most from your machinery and equipment and a better understanding of any issues your fuel injection pump might be having.

Generator engine service

Keep crucial equipment powered. Keep your system running perfectly with our diagnostic testing reports to performing a complete overhaul.

Transmission service

Keep your system running as it should and get the performance you need from your transmission with regular maintenance services.

New transmissions available from our shop as needed.

Marine Engine Service

The most versatile diesel engine repair facilities throughout the east coast, we’re ready to step in and make sure everything is running as it should.

Testimonals

What our clients say about Casco Bay Diesel

How was your expereince with Casco Bay Diesel? Click the Google icon below to leave a comment.

United States Coast Guard

"Mr. Chamberlain’s work ethic and experience throughout the retrofit, coupled with his willingness to teach, instilled a higher level of expertise on our ship GRAND ISLE I would have not believed possible. On behalf of my entire crew, I wish to thank Mr. Chamberlain for a job well done."

Matt Stedman

"Bob, Gaylen, and the boys at CBD have been nothing short of incredible , dependable, and trustworthy part of my boating program. I’m very happy to have CBD in my network when that time comes."

Kevin Simons

"From the very start they were quick to respond, professional and provided all the info I needed to make educated decisions about the rebuild. Galen and his team are very experienced professionals. I will be calling Casco Bay Diesel for all of my needs for my boat and generator!"

Frequently Asked Questions

Answers to your most common questions

Casco Bay Diesel strives to be as transparent as possible. We answer all your most asked questions to the best of our ability.

Got a question? Ask us by emailing info@cascobaydiesel.com or give us a call on (207) 878-9377.

What marine diesel engine brands do you service in New England?

Casco Bay Diesel provides factory-authorized service, parts, and warranty repairs for Yanmar, Cummins, Scania, and MAN marine engines. Our technicians serve the coastal regions from Portland, Maine, to Hyannis, Massachusetts, utilizing dealer-level diagnostic software for precise troubleshooting and performance optimization.

Do you offer mobile or dockside diesel repair services?

Yes, we provide comprehensive mobile and dockside diesel repair for both recreational yachts and commercial vessels. Our service fleet is equipped to handle on-site engine diagnostics, emergency repairs, and routine maintenance directly at your slip or facility throughout the Greater New England area.

What is included in a professional marine engine survey?

Our marine engine surveys are designed for pre-purchase inspections or insurance requirements. They include a comprehensive mechanical inspection, computerized diagnostic health checks, fluid analysis (oil and coolant), and a sea trial to monitor engine parameters under load, ensuring the vessel’s propulsion system meets manufacturer standards.

Can you repair and test diesel fuel injection systems?

Casco Bay Diesel operates a specialized Fuel Injection Shop capable of testing, calibrating, and rebuilding mechanical and electronic fuel injectors and pumps. We service high-pressure common rail (HPCR) systems and traditional mechanical systems to restore fuel efficiency and reduce engine emissions.

Why should I choose a factory-authorized dealer for diesel maintenance?

Choosing a factory-authorized dealer like Casco Bay Diesel ensures your engine is serviced by certified technicians using genuine OEM parts and specialized diagnostic tools (such as MAN-Cat or Cummins Insite). This maintains your manufacturer warranty, ensures the highest safety standards, and preserves the long-term resale value of your vessel or equipment.