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Performance Cruising Gemini 105Mc

US $112,000






34 ft

Hull Material


Engine/Fuel Type




About this Boat

New to Market.

This boat is "Turn Key and Sail away"!

Westerbeke Diesel has been very well maintained(893 total hours)
Hull Waxed(12/2017)
Bottom Painted(12/2017)
Engine Serviced(12/2017)
Sonic Drive Serviced(12/2017)
Sails Inspected & Restitched(05/2016)

Includes "LIKE NEW" 2016 AB 9' Tender & Yamaha 6hp Four Stroke O/B

Lewmar Pro 1000 Windlass(2016) w/ Rocna Anchor(2016)


  • Designer:
  • Keel: Centerboard


  • LOA:
  • Beam: 14 ft
  • LWL: 31.75 ft
  • Maximum Draft: 5.5 ft
  • Maximum Displacement:
  • Dry Weight: 9,600 lb

Additional Details

Manufacturer Provided Description

Through over 930 boats, every aspect of the Gemini 105Mc has evolved for maximum performance. The near constant tuning and tweaking of sail plans, rig, and structure results in a cruising catamaran with unparalleled performance. Whether sailing to windward in 25 knots or ghosting at wind-speed in 5 knots of true wind, the Gemini is a cruising boat that offers exhilarating sailing every time.

Sail Area

Main - 340 sq.ft.
Genoa - 350 sq.ft.


Discover the Gemini 105Mc's expansive interior complete with comfortable dinette seating for six, sleeping room for up to eight, a double-sided work surface in the galley with a front-loading 4 cubic foot refrigerator, a beautiful master cabin with an incredible view, roomy head with separate shower, and much more.  The head features standing head room, marine toilet, single bowl sink, medicine cabinet, additional storage locker, and a separate shower head with a unique folding Plexiglass door for keeping a towel and change of clothes dry while you take a shower. The head also features a unique fresh-water flush for the toilet which provides a quick and easy way to virtually eliminate head-odor. The 18-gallon holding tank is owner-accessible from the sail locker and can be gravity drained or emptied from the pump-out on deck. Each of the aft cabins contains a "cozy double" bed, hanging storage lockers and drawer, and plenty of ventilation thanks to Bomar hatches on each side and optional fans. The area underneath each bed houses a 30-gallon water tank for a total of 60-gallons. There is also a 6-gallon water heater, various seacocks for the engine and installed Mermaid 16,500BTU Air Conditioner, and room for a modular water maker.


The galley of the 105Mc is twice the size of previous models and features a double-sided work surface, double burner propane stove-top with oven and separate broiler, a double stainless sink, easy access to the four cubic foot refrigerator (powered by propane or 110v), two AC outlets on either side of the galley, and plenty of accessible storage. The 105Mc has 60 gallons of water storage split between two 30 gallon tanks located under the aft cabin berths.


The Gemini is powered by a LOW HOUR, WELL MAINTAINED 27 hp Westerbeke diesel with 55-amp alternator and heat exchanger for hot water. It is designed and built using experience gained in supplying over 1,100 whale boat engines to the United States Navy. The greater piston Bore of the 30B Three delivers more power without sacrificing smooth and quiet operation. To minimize engine maintenance, the 30B Three is fresh water cooled and equipped with a simple control system. Easy access to all servicing points and a self-bleeding fuel system allows easy installation and routine maintenance. The engine weighs 274 pounds and drives a lift-able, steer-able outdrive leg from Sillette marine with a large efficient propeller. With this configuration, the Gemini can motor in as little as 20 inches of water and when sailing, the drive leg and prop are pumped up and clear of the water. With no fixed prop in the water, there's little to no drag and nothing to get fouled or bent on trap lines or the bottom.

History of the Design

First introduced on the original Gemini 105M, the hull shape of the 105Mc is still revolutionary in the multihull industry. The hulls of the Gemini 105Mc are shallow and shaped much like a "teardrop" which requires little force to move the 105Mc through the water yet it also provides a high load carrying capacity (450 lb per hull per 1"). The bridge deck has 39" of clearance at the bow. This, combined with the lack of pitching and wave making, translates to a comfortable ride with no heeling. The shape has been tested and proven in a wide variety of conditions... surfing down 30' waves in the mid-Atlantic, cruising to Hawaii, or cruising down the Intracoastal waterway. The Gemini hulls provide many advantages considering their weight and structural rigidity. The entire hull mold is one complete unit including the centerboard cases. This single unit eliminates any secondary bonding down the keel, at the bridge deck or around the centerboard cases making for a far stronger hull. The result - a faster, stronger, and more stable platform that provides excellent sailing performance.
Throughout the history of the Gemini Catamaran, the centerboards have always been her secret weapon and the reason why she points so well to windward. The lift-able boards provide plenty of 'grip' while going to windward yet are easily retractable. So going downwind, the boards are raised thus minimizing drag and maximizing performance. The 105Mc's centerboards combine the pivoting, kick up cruising convenience of centerboards, with the remarkably efficient shape of dagger boards. The centerboards in the Gemini 105Mc have an advanced asymmetric shape that lifts the boat to windward with reduced drag. The boards are now molded with closed cell foam, which ensures they will last a lifetime. The centerboards case has a Plexiglas cover enabling the operator to see whether they are up or down. Centerboards are operated from inside and will easily kick up if the boat is grounded.

Detailed Description

   Boat Name

Mirage (Mirage is a US Coast Guard documented sailing vessel registered in Florida)  


  • LOA: 34 ft 6 in
  • Beam: 14 ft 0 in
  • LWL: 31 ft 8 in
  • Minimum Draft: 1 ft 6 in
  • Maximum Draft: 5 ft 6 in
  • Displacement: 8000 lbs
  • Bridge Clearance: 46 ft 0 in  


  • Engine Brand: Westerbeke
  • Engine Model: 30B
  • Engine Type: Inboard Engine
  • Fuel Type: Diesel Engine Hours: 893
  • Propeller: 3 blade propeller
  • Engine Power: 27 HP  
  • Cruising Speed: Approximately 7 knots  


  • Fresh Water Tanks: 2 (30 Gallons)
  • Fuel Tanks: 2 (18 Gallons)
  • Holding Tanks: 1 (18 Gallons)  


  • 3 Cabin, 1 Head
  • Large main salon with U-Shaped settee that converts to queen bed
  • Teak Dinette Table
  • Master Cabin: Forward, Queen
  • Aft cabin in each hull with full bed, drawer, storage and hanging locker
  • Head: Manual with holding tank, 
  • Shower and vanity with medicine chest


  • Refrigerator: Dometic 
  • Stove: Voyager 2500, Propane, (2) Burners
  • Oven: Voyager 2500, Propane,
  • Sink: (2) Basin, Stainless Steel


  • Tridata (Speed, Depth, Wind): Raymarine
  • Autopilot: Raymarine
  • VHF: Raymarine
  • GPS: Garmin 546s
  • Stereo: Sony AM/FM/CD
  • Stereo Speakers: (2) Poly Planar in Main Salon, (2) Jensen in cockpit


  • House Batteries: (2) Interstate “SRM-24” Deep Cycle Marine 
  • Engine Start: (1) Interstate “SRM-24” Deep Cycle Marine
  • Battery Charger: Portable Schumacher XCS15 Speed Charge 15 Amp
  • Batteries also charge via the aft mounted solar panel or the vessel’s engine alternator
  • Shore Power Cords: (1) 50' Marinco 30-amp shore power cable, yellow Marinco
  • Shore Power Adapter 30-amp to 15-amp adaptor

    Sails & Rigging

  • Main: 340 sq ft, Synthetic, (2006) 
  • Genoa: 350 sq ft, Synthetic, (2006) 
  • Roller Furling Jib: Furlex 200S
  • Rig: Masthead Sloop Rig
  • Backstay: Split adjustable
  • Winches: (2)  Lewmar 40 in cockpit, (2) Lewmar 7 mounted on mast
  • (3) Winch handles
  • Mainsheet Traveler
  • Mast: Selden Aluminum, with Mack Pack sail cover and lazy jacks

    Hull & Deck

  • Hull & Deck color: White
  • Fiberglass Dodger with (2) opening skylights
  • (2) Cockpit Lockers in addition to engine compartment 
  • Dinghy Davits
  • Lewmar Pro Series 1000 Windlass
  • Anchors: (1) 33 lb Rocna (primary), (1) 22 lb Danforth, (1) 22 lb Delta
  • Primary anchor mated to windlass-compatible 70’ HT 5/16 chain braided to 150’ 3-strand line
  • Backup rode: 55’ 5/16 chain with 100’ 3-strand line
  • Additional Backup rode: 15’ chain with 100’ 3-strand line
  • Six nylon docking lines 25’ to 35’ in length


  • Air Conditioning: 115 volt “Mermaid” 16,500 BTU, reverse cycle
  • Water Heater: “Force 10” six-gallon, powered with 120 volts via AC panel and/or heat exchanger coil in engine compartment
  • Refrigerator: Dometic 120 volt/12 volt/LPG model “RM 2451”
  • Complete set of manuals for Gemini, Westerbeke, Sillette, and accessories
  • Speedseal Cover for easy access to pump impeller


  • 30” USCG Approved Throwable Life Ring
  • Three USCG Approved portable fire extinguishers
  • Two extendable boat hooks and an extendable Landing Loop
  • Hand Bilge Pump
  • Carbon Monoxide Detector/Alarm
  • Loos Brand “Model B” rigging tension gauge
  • Digital Volt Meter
  • Compressed Air Horn (USCG Approved Sound Producing Device)
  • Four 120-Volt Honeywell air circulating fans
  • Six 12-Volt Hella Fans mounted throughout
  • Four Hatch Screens (Insect Screens)
  • Four custom white Outlander PVC hatch covers that significantly reduce heat transfer into the boat
  • Wide adjustable and removable vinyl helm seat
  • Complete set of white cockpit cushions
  • Phifertex snap-on window covers for both large windows and all cockpit windows
  • Four USCG Approved life vests
  • Hammock seat that attaches to the rear dinghy davits (not currently installed but onboard)
  • Engine Spares-Extensive list available upon request

2016 AB 9-VL 4 person 9'6" RHIB

Adjustable oars
Air Pump
Lewmar 4.4# claw anchor w/ 4' chain & 50' line rode
Battery operated navigation lights
Two small fenders
Patch Kit


2016 Yamaha 6hp Four Storke

3-gallon fuel tank w/ hose and primer bulb
Safety Lanyard
Currently Fogged for storage

The Company offers the details of this vessel in good faith but cannot guarantee or warrant the accuracy of this information nor warrant the condition of the vessel. A buyer should instruct his agents, or his surveyors, to investigate such details as the buyer desires validated. This vessel is offered subject to prior sale, price change, or withdrawal without notice.

This listing is courtesy of the BoatWizard MLS and may be centrally listed with another broker. It is offered as a convenience by this broker/dealer to its clients and is not intended to convey representation of a particular vessel.

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