All Systems – Power / Electrics & Electronics / Plumbing / Rigging / Fiberglass


Great Bay Marine is the Seacoasts Full-service marine facility

Great Bay Marine has been servicing Boats for well over 40 years. From servicing your outboard to fixing electrical issues our certified techs will help you get your boat ready for the season. We have a wide range of services which include boat hauling & bottom painting, shrink-wrapping, on-site maintenance & repairs, inside & outside storage, engine re-powering, spring commissioning and winterization. If you have a special project in mind give us a call or fill out our Service Request form listed below. We look forward to working with you.


  • All Engine & Onboard Systems Serviced
  • OEM Trained Service Centers for Cummins Marine, Honda Marine, Tohatsu, Westerbeke / Universal, Beta Marine, Volvo Penta, Mercruiser, & Yanmar Diesel
  • ABYC Certified Electrical / Electronics Service & Installation
  • Paint Services (Bottom paint, AWLGrip, Bright work etc.)
  • Complete Winterizing & Decommissioning
  • Spring Commissioning
  • On-Site Fuel Polishing & Cleaning
  • Fiberglass Services





Payment is due upon receipt of invoice and before vessel is launched or leaves yard. Any questions or problems with billing or work performed must be reported to Great Bay Marine within 15 days of receipt. A service charge will be added to all accounts 30 days past due, and all work will be halted until the account is current. The cost of collection of any monies due, including, but not limited to attorneys and Marshall Fees and boat auction fees, will be added. Great Bay Marine reserves the right to haul the boat out of the water upon completion of the work or anytime thereafter and detain the boat in the yard until the account is paid in full. Work performed dockside requires pre-payment based on an estimate of work. Any remaining balances are due upon receipt of invoice. Work over $500.00 needing a major material purchase requires a deposit. GBM labor rates are $45.00 /hr. for boat cleaning, $75.00 /hr. for general labor (compounding, waxing, detailing bottom painting and general help) and $130.00 /hr. for skilled labor (carpentry, mechanical, and fiberglass work). A labor surcharge of $10.00 /hr. will be charged to install owner-supplied equipment or materials.
No outside laborer or independent contractors’ work allowed in the yard unless permission is obtained by GBM. All outside laborers and independent contractors must sign in at the GBM Service Office and submit proper insurance documents. The subcontractor /independent contractor is responsible for maintaining insurance on employees and their work; a copy of the certificate of insurance must be on file with GBM prior to any work being started.
GBM charges a daily fee of $100.00 for all sub-contractors working in the yard.
No open flames are allowed in any area of the yard. Shoring and jack stands must not be moved or adjusted by anyone other than GBM personnel. Tying tarps or ladders to jack stands is prohibited. It is mandatory that all bottom sanding be done with a vacuum sander. All scraping and grinding must be tented, and a drop cloth must be placed under the boat. Paint spraying, sandblasting, welding, power washing, or shrink-wrapping is prohibited by anyone other than a GBM employee or agent. Unused bait and fish remains must not be left in the garbage containers provided by GBM.
It is the boat owner’s responsibility to check all seacocks. Owner must inform travel lift crew of any underwater mechanisms or obstructions before setting of straps or assume responsibility for damage of the same. Wooden boats are subject to an additional charge, should more than ½ hour sling time be needed at launch. Extra hauls and launches are billed at the normal rate. Rates for hauling and loading onto trailer or truck allow a maximum of 1-hour sling time. If additional sling time is required, the rate is $125.00 /hr., with a ½ hour minimum charge.
Warranty work: Great Bay Marine guarantees its work to be correct to accepted standards and will remedy defects upon approval from management. Boats must be delivered to GBM at owner’s expense for warranty work. Should yard personnel need to travel to a boat to perform warranty work, owner agrees to pay $75.00 /hour travel time plus 50¢ per mile round trip.
All boats must be insured – Certificate of Insurance Required

We work with the following brands: