Back to top

1966 Tripp 31 Masthead Sloop

South Berwick, Maine



Designer: William Tripp, Jr.

Builder: Amsterdam Shipyard (Hull #178)

2003- present by present owner

Restoration began in 2003 inside my heated boat barn, stripping out all old plumbing, wiring, old Atomic 4 engine, and exterior woodwork. The interior cabinetry was in excellent shape and only needed a fresh coat of hand-rubbed varnish. Keel bolts were inspected and found to be in excellent shape. Hull  was sent to Bristol, RI for cosmetic fiberglass and epoxy work by Guck Inc. Four opening Spartan ports were installed in the main cabin, Awlgrip painting of topsides, deck and non-skids, and cabin tops and sides. Returning to the boat barn, new mahogany toe rails, grab rails, hatches, eyebrows, and cockpit combings were installed and varnished. Custom designed and cast bronze mid-ship cleats and bow roller were installed. New Lewmar #30 self-tailing sheet winches were installed as well as refurbished windlass and original deck hardware and stanchions with G-10 backing plates. 

In the interior, new wiring in conduits, new lights with red/white bulbs, and new custom electric  panel by Oceans Pursuits were installed. New Groco thru-hulls, hoses, pex hot and cold water lines, stainless marine hot water heater by Isotemp, pressure pump, and manifold for auxiliary foot  pump operation were also added. New stainless bow tank added and keel tank was refurbished with two-part potable coating. Holding tank and pump were added to the head. Sea Frost refrigeration added to the refurbished reefer. New countertops and sink added to the galley. Cozy Cabin heater and propane grill with new distribution manifold and horizontal propane tanks in aft locker were added.   

New Westerbeke 3-cylinder 27 hp diesel and custom properly installed muffler were installed. New Doyle loose-footed main with three reefing points was purchased, as well as 100% jib and asymmetrical spinnaker in 2004. New standing rigging and life lines in 2012. New Regatta Braid mainsheet and blocks in 2013. New digital radar  by Raymarine in 2014. Harken roller-furling/reefing 120% jib by Maine Sailing Partners. New Dickerson 2-burner galley stove in 2020 and new dodger by Shoals Canvas in 2015.   


Basic Boat Info

Make: Tripp
Model: 31 Masthead Sloop
Year: 1966
Condition: Used
Category: Sail
Builder: Amsterdam Shipyard
Designer: William Tripp, Jr.
Construction: Fiberglass


Length: 31 ft
Length Overall: 31'6 ft
Waterline Length: 20'6 ft
Beam: 9 ft
Max Draft: 4'6 ft
Displacement: 8,000 lb

Engines / Speed

Engines: 1
  • Make: Westerbeke
  • Model: 30B
  • Fuel: Diesel
  • Engine Power: 27hp
  • Year: 2011
  • Engine Hours: 192


Heads Count: 1
Boat Class: Sloop


Annie Gray
Gray & Gray Yacht Brokers, Inc.


Gray & Gray Yachts
36 York Street
York, ME, US, 03909
Tel:(207) 363-7997


As part of an extensive restoration, all the following new equipment was added prior to a re-launch in 2013 (except where noted):

  • 2011 Westerbeke 30B 3 cylinder, 27 HP diesel engine, FWC, with Admiral control panel with gauges & warning buzzers; approximately 192 hours; S/S shaft; 3 blade bronze prop. 
  • Cruising speed: 5 knots @ 2500 RPM; Maximum speed: 6 knots.
  • Balmar high-output alternator with ARS-5 multi-stage voltage regulator.
  • 3 AGM batteries & 3-bladed bronze prop.



  • Solid fiberglass hull.
  • Barrier-coated bottom with Micron 66 bottom pain applied over.
  • Awlgrip white paint on topsides, deck & non-skid & cabin.
  • New Mahogany toe rails, grab rails, eyebrows, main & forward hatches.
  • Cockpit coamings.
  • Six opening bronze ports, three fixed bronze ports.
  • Two Dorade vents with bronze cowls; bronze hardware.
  • New S/S double lifelines.
  • Groco thru-hulls & hoses.
  • Custom distribution panel; tinned copper wiring in conduit.
  • Wheel steering.



Fuel: 20 gallons in Monel tank (original).

Water: 30 gallon fiberglass keel tank (original) and 44 gallon S/S bow tank.

Holding: yes



  • 12V new circuit breaker panel.
  • 3 AGM Group 31 12V batteries with vapor proof switch; batteries located in cockpit locker. 


  • Vee berth forward sleeps two; mattress is 6" high-density foam with custom mattress pad & sheets.
  • The head is to port with teak grate sole & holding tank; hanging locker to starboard.
  • Salon has a bulkhead-mounted table with port & starboard settees.
  • Seat cushions & back cushions all in new Sunbrella fabric.
  • Ample hand-rubbed varnished mahogany lockers & bookshelves throughout cabin (original); teak and holly cabin sole.
  • Cozy Cabin propane heater.
  • Stereo CD/radio & speakers.
  • Aft-galley with Dickerson 2-burner propane stove.
  • Two 10-pound aluminum propane tanks.
  • Kuuma propane grill.
  • Isotemp hot water heater.
  • Seafrost refrigeration.
  • Pressure hot & cold water with secondary foot pump at galley sink.
  • Set of German white porcelain dishes, original to the boat.



• Raymarine model C95 chart plotter.
• Raymarine digital radar (4 KW 18").
• ST60 wind, ST60 tri-data depth & knotmeter & ST6001 smart/pilot controller on Vetus cockpit pedestal wheel steering; below-decks hydraulic Autohelm.
• Standard Horizon Quest GX12555 25 watt VHF /FM.
• 2 Ganze solar panels with charger/controller.



  • Keel-stepped aluminum mast.
  • Sail area is 459 sq. ft.
  • Fir boom.
  • 2013 new S/S standing rigging; Awlgrip-painted aluminum mast.
  • Lopo masthead navigation anchor light with strobe and deck-mounted nav lights.
  • New low-stretch halyards.
  • 2010 new running rigging.
  • 2014 Harken MKIV roller-furling with 120% Genoa by Maine Sailing Partners.
  • 2013 Loose-footed main with three jiffy-reefs by Doyle with 2014  lazy-jacks.
  • 2013 Asymmetrical cruising spinnaker in a sock by Doyle.
  • Riding sail.
  • Telescoping aluminum whisker pole on deck chocks.
  • Storm trysail & jib (original, very good condition).
  • Mainsheet traveler.



  • TENDER: 8 ½' Avon Rover Lite, hard-bottom Hypalon inflatable dinghy with 6 HP Mercury 4-stroke outboard motor; tool kit & lifting straps for motor; folding anchor; fire extinguisher; two-piece varnished wood oars.
  • 2014 Sunbrella dodger; Sunbrella mainsail cover.
  • Two Lewmar 30# bronze self-tailing sheet winches; 2 Merriman original bronze halyard winches.
  • Maxwell/Nilsson 12V windlass.
  • 33 lb Bruce anchor with 300' of 1/4" chain on custom bronze bow-roller;
    secondary Fortress 10 lb anchor with 30' of chain & 300' of rode; 55# fisherman storm anchor on chocks in lazarette with 30' of chain & 300' of rode.
  • Two manual Whale Gusher bilge pumps (one in cockpit, one in main cabin); electric bilge pump.
  • Deck wash pump.
  • Fireboy alarm.
  • Propane leak alarm & holding tank alarm.
  • Two ABC fire extinguishers.
  • Portable searchlight.
  • Custom vee berth linens.
  • 5 jack stands.
  • Windscoop; padded bag for dropboards.
  • 2 fenderboards; 4 fenders; 4 docklines.
  • Lifering.


Potential purchasers should assume that items on the vessel at the time of viewing, but not specifically listed on this specification sheet, are not included with the sale of the yacht. These specifications are believed to be correct but cannot be guaranteed. Specifications are provided for information purposes. Data was obtained from sources believed reliable but is not guaranteed by owner or brokers. Buyer assumes responsibility to verify all speeds, consumptions, capacities and other measurements contained herein and otherwise provided, and agrees to instruct his surveyor to confirm such details prior to purchase. Vessel subject to sale, price and inventory changes, and withdrawal from market without notice. 


Mechanical Disclaimer: Engine and generator hours are as of the date of the original listing and are a representation of what the listing broker is told by the owner and/or actual reading of the engine hour meter. The broker cannot guarantee the true hours. It is the responsibility of the purchaser and/or his agent to verify engine hours, warranties implied or otherwise, and major overhauls as well as ALL other representations noted on the listing.


DISCLAIMER TO BOARD VESSEL: In the event the Buyer boards the vessel either on land or in the water without a broker or owner, the Buyer(s) agrees and understands he boards at his sole risk and liability.