Marine Service

Outermost Harbor Marine Service

Your Premier Marine Service in Chatham, Cape Cod

Outermost Harbor Marine is one of the premier providers of marine services on Cape Cod. We are a full-service, year-round boat yard with Yamaha and Mercury Master Technicians and a fully stocked parts department. We provide every service that you will need for your boat to keep it in the best shape possible. We also offer mobile service options and boat pickup and delivery. Give one of our service coordinators a call and we will help you with whatever situation you may have. Contact the service department at 508-945-2030 Ext. 2 or complete the contact form here.

Our hassle free marine service on Cape Cod includes but is not limited to:

 Engine repair and repower

Yamaha & Mercury Outboard Sales & Service

Paint and bright work restoration

Boat trailer sales/fitting

Electrical systems repair

Marine electronics repair and installation

Canvas fabrication and repairs

Boat lettering

On-site boat storage

Yamaha Outboard Marine Maintenance
Yamaha outboard service

Qualified Master Technicians

Outermost Harbor Marine is proud to offer a Yamaha Certified Master Technician at our dealership. This is an outstanding achievement for the technicians who have attained such an accreditation. It takes 6 years of training to attain this distinction. Outermost has the only Master Tech on the lower Cape.

Peter Master Yamaha Technician

Extensive Parts Inventory

The Parts Department at Outermost has a large volume of stock to meet your needs. Most of our stock is geared towards Yamaha engines. We do have parts/can order parts for Contender, Scout, Intrepid, Key West, Formula and Sea Ray boat lines as well. However, if there’s any part that you need, our parts department would gladly special order it for you. For more parts information, contact us now.

Various Boat and Motor Repair Options

In addition to repairing engines, Outermost Harbor Marine also offers various other services. We have a skilled fiberglass and gelcoat crafter in our staff who can do wonders in repairing damage and imperfections on boats. We also work hand in hand with Brown’s Marine Canvas to address any canvas enclosures or isinglass work you may have.

Outermost Harbor Marine is truly a full service boat yard. From hauling and launching your boat, to complete engine service, to waxing and shrink-wrapping, our team is capable and prepared to handle your marine service needs.

  • The Lower Cape’s Only Yamaha Certified Master Technician
  • Marine Electronics Installations –
  • Certified NMEA, Garmin Installer
  • Certified NMEA, Raymarine Installer
  • Yamaha Certified Five Star Key Dealership
  • Mercury Marine Full Line Dealership
  • Over Fifty Years of Combined Service Experience
  • Detailing Services
  • Shrink Wrapping
  • Summer and Winter Storage
  • Pressure Washing
  • Bottom Painting
  • Voted best marina in Chatham
  • Boat Hauling and Launching
  • Mooring Service
  • Fiberglass and Gel Coat Repair
  • Towing
  • Home Pickup & Delivery
  • Captain’s Service
  • Forklift Service
  • Re-Powers
  • Boat Systems
  • Electrical Systems and Wiring


We pride ourselves in having great communication between our members and our staff. If you are crunched for time and need something done on your boat, we’d be happy to help. Is it ice, water, food, parts, something from the retail shop or a service? If you’d like your boat fueled prior to your arrival, not a problem. We will have you ready to go. The cost is $60/day per boat plus item(s) requested.

We’re offering a new service where every Thursday we will:
• Start your boat
• Check all systems
• Make necessary repairs after discussing them with you
The cost is $215.00 per month or $60.00 per check.

Would you like your boat cleaned on a weekly or monthly basis? For all cleaning and detailing inquiries please contact Service@outermostharbor.com