• Repowering
  • Painting
  • Fiberglass
  • Awlgrip
  • Electronics
  • Mechanical

We know that many boatyards offer repower services, but it’s our integrity, experience, and dedication to the highest standards, that set us apart from the rest!

When doing your repower, our first choice is Yanmar Diesel because it’s the leading supplier of marine diesel engines for repowering.  Designed as marine engines from the start, Yanmar diesels provide High Performance, Lightweight Engines that are Smooth Running, Fuel-Efficient and Built to Last!

At Knowles Marine & Yacht Services, it’s our skill and attention to the details that provide our customers with the BEST PRODUCT AVAILABLE.  From planning and lay-out, to installations by the book, with proper documentation that initiates the warranty, to a Full Yanmar Sea Trial, and education of the owner as the last and very important step, you are assured of receiving the BEST THE INDUSTRY HAS TO OFFER in repowers!


Knowles Marine workspace has optimal working conditions for painting your vessel. Whether your need is a yearly maintenance program or repainting topsides or a hull; whether with a spray gun with the new linear polyurethane finishes or with a roller and brush using traditional marine enamels and varnishes, our paint crew will give your boat the same care and attention that has earned us our reputation for top quality and service. We are experts at refinishing both sail and power vessels and, being a full service marina and boatyard, you can expect nothing but the best in products and service from us.

Fiberglass Repair

Fiberglass and gelcoat experts at Knowles Marine have the experience and talent to fabricate new parts or repair damaged areas on your boat. Our on-staff, skilled professionals can rebuild your boat to its original strength and cosmetic appearance.

Awlgrip Painting

Knowles Marine specializes in Awlgrip® application.

Awlgrip® is a high durability product, that requires very specific safety precautions, application skill and a controlled environment for proper application. With expert application, Awlgrip® is the most recommended paint in the marine environment.   With our crew’s expert, attention to detail, we are able to produce the finest finishing jobs anywhere.

For a beautiful Awlgrip® job that will endure salt water, ultra violet rays and corrosion with minimum maintenance, Knowles Marine is the place for you.

Marine Electronics

While much of our service work is performed on site in our yard, our staff is available for onboard troubleshooting, repairs and installations.

Whether you need a minor electrical repair of a major installation or you want to upgrade an existing system, the professional, certified staff at Knowles Marine can meet your marine electronics requirements.

Mechanical Systems

We have the ability to keep your sail or powerboat running perfectly all season. We offer complete mechanical service and installation on a wide range of mechanical systems including:

  • Gas & Diesel Engine Service, Repair and Rebuild
  • Fuel System Engineering
  • Fuel Separator Installations
  • Engine Synchronization
  • Cooling System Repair
  • Turbo Charger Service
  • Stem Drive Units
  • Injector Repair and Adjustment
  • Drive Train Vibration Remediation
  • Strut, Shaft, Rudder Repair
  • Exhaust & Manifold Service
  • Wheels, Shafts, Struts and Engine Alignments
  • Marine Air Conditioning and Refrigeration Services
  • Mobile Fuel Polishing Service

Our on-site, certified diesel and gas technicians work with a variety of power types, including Caterpillar, Yanmar, Volvo, and much more. Whether you need general maintenance, a simple rebuild or extensive re-powering and refitting, Knowles Marine and Boatyard can get you back on the water quickly and economically.

Charter Fishing
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We offer a number of vessels fully equipped with GPS, Depth Finder, & Radar. Life Jackets are always on board for your safety.

Half Day Trips & Full Day Trips Available!


We lift boats upto 40 Tons