Used Sail Catamaran for sale Sigma 41 Full Specifications
$59,000 S/V Kahu
Mon - Fri: 9:00 - 18:00
4005 N Federal Highway, Suite 200
Sigma 41 racer-cruiser, designed by David Thomas, built 1984, launched 1986 by Marine Projects Plymouth
Hull: solid fiberglass; deck: balsa sandwich with plywood reinforcement
Keel: cast iron with lead shoe, deep fin keel for offshore performance
Rig: 3/4 fractional Selden mast, deep forefoot, two-spreader configuration
Refit periods: 2012 (Flexiteek deck, canvas, electric primaries), 2023–2025 comprehensive refit (rigging, electricals, through-hulls, batteries, monitoring)
Proven offshore passage: Atlantic crossing Cape Verde to Brazil, coastal South America, cruising Caribbean
Flag/registration: New Zealand flagged, VAT paid in EU
Current location: Caribbean (listed in Grenada)
Cabins: 2 (forward cabin with V-berth convertible to storage; aft cabin port with large double berth)
Heads: 2 (forward head with Jabsco manual toilet, basin, shower sump; aft head with basin and shower sump)
Main saloon: U-shaped settee to port with folding dining table; straight settee to starboard; pilot berths outboard on both sides
Galley: U-shaped, secure, located aft to port beside companionway
Nav station: half-size to starboard with quarter berth behind (currently technical/storage area)
All berths fitted with lee cloths
New mattresses and settee squabs (2023)
Massive starboard cockpit locker with standing-room storage
Forward cabin: 190 cm length x 210 cm width at head / 80 cm width at foot
Aft cabin: 190 cm length x 130 cm/70 cm
Starboard settee: 190 cm
Port settee: 180 cm
Pilot berths: 190 cm
Forward cabin: 175 cm
Forward head: 185 cm
Main cabin: 190 cm minimum throughout
Galley: 190 cm
Aft head: 175 cm
Aft cabin: 180 cm
Two manual Jabsco heads, fully serviced 2024
Saltwater/deck wash outlets in cockpit and galley (2024)
Freshwater cockpit shower (2024)
Techimpex 2-burner hob (needs repair/replacement)
Magma BBQ
Three Hella 12V fans (2023)
Top-loading fridge with Frigoboat K35 water-cooled compressor (controller replaced 2024)
Sealarm gas solenoid control (needs replacing)
New freshwater tap (2023)
Pressurized freshwater system with 1 L accumulator plus foot pump backup
40 L QL water heater (engine/AC heated)
Three Campingaz 2.7 kg propane tanks
CO and smoke alarms
Warm solid wood joinery, excellent ventilation from six hatches (two new in 2024)
Airmar DST810 speed/depth transducer (2023)
B&G WS310 wind sensor (2023)
NMEA2000 barometer (2023)
Digital Yacht AIS with splitter
ShipModul Miniplex 3Wi N2K multiplexer
NASA cockpit displays: wind, close-hauled wind, log, depth
B&G HALO 20+ radar (2023)
Digital Yacht router
NASA depth transducer (backed up to NMEA2000 cockpit unit)
Precision 9 compass (2023)
Plastimo Offshore 135 compass (2024)
DualNav GPS antenna
Iridium GO with spare SIM cards
ICOM IC-M302 fixed VHF
Standard Horizon HX870 GPS handheld VHF
Ocean Signal EPIRB1
Raymarine linear drive autopilot with ST6002 controller
Loudhailer/horn (functioning but disconnected)
Sidepower wireless remote for anchor windlass and bow thruster
Four 100 W Renogy rigid solar panels on stainless liferails (2023)
Superwind wind generator
Victron MultiPlus Compact 1600/70 charger/inverter (2023)
Renogy 50 A DC-DC dual-input charger with MPPT and remote display (2023)
Two 100 Ah Renogy lithium service batteries (2023)
One start battery (2024)
Two bow thruster/windlass batteries (2023)
70 A alternator (new 2024)
Remote battery monitors for house and engine banks
Renewed fusing and cabling throughout
Four forward keel bolts replaced (2022)
All underwater through-hulls replaced with Trudesign (2024)
Foredeck re-cored (2023)
Antifoul: Micron 350 (2024)
Flexiteek decking (2012)
Windows re-bedded (2025)
Six ventilation hatches (aft head and aft cabin new 2024)
Quick horizontal anchor windlass with extended fairlead
Anchors: 20 kg Rocna (2017); 15 kg Delta; 15 kg Bruce
Ground tackle chain: 80 m 8 mm chain (2023)
Aries wind vane steering
Simpson dinghy davits (interchangeable with windvane)
Pasarelle and outboard davit
Swim ladder
Twin biminis (can remain up while sailing) with insert panel for shade at anchor
Spray dodger with reversible side curtain, mosquito nets, multiple covers
Hero 4-person ISO 9650-1 life raft (next service 09/26)
Katadyn Powersurvivor 80E watermaker (serviced 2025; new membrane 2019)
Jerry cans: five diesel, one gasoline
Whitlock Cobra steering system
Standing rigging replaced (2023)
Selden 2-spreader 3/4 fractional mast serviced 2023 (spreader end caps and halyard sheaves replaced; fittings reinstalled with anti-corrosion coatings)
Inner chainplates removed and inspected 2023
Solid vang and adjustable backstay
Selden Type C headsail furler
Three 10 mm Dyneema halyards (2023)
Dyneema running backstays and lifelines (2023)
Webbing jacklines (2023)
Mainsail (2012, serviced 2024) with 3 reefs and flattening reef
Genoa (2012, serviced 2024)
Two spinnakers (one recut as cruising chute, unused by current owner)
Storm jib and trisail (original, unused)
Ronstan Ballslide sail track system (2012)
Spinnaker pole and Spinlock jammers
Two Lewmar Evo 50 electric primaries (2012)
Six Lewmar 40 self-tailing winches plus four Lewmar 40 control line winches
Stackpack (functional but needs repair)
Bimini/spray dodger (2016)
Various lines, fenders, spare blocks, winch handles, and hurricane lines
Beta Marine 45T turbo diesel engine (built 2021, installed 2024)
Engine hours: 100 hrs since installation, 350 hrs total
Deluxe cockpit control panel: oil pressure, temperature, voltage, tachometer
New 60 mm Vetus exhaust system
New Morse control cables (2024)
New shaft (2023)
Max-Prop 2-blade Classic with spur rope cutter
R&D flexible coupling (2024)
Shaft coupling and mounts (2024)
Engine compartment fan (2024)
Sidepower SP75 bow thruster with remote
Fuel lines and filters replaced 2024 (Delphi primary + separator)
1100 GPH electric bilge pump (2024)
Two manual bilge pumps (cockpit and cabin)
Automatic engine compartment fire extinguisher (2023)
Two Firex lithium extinguishers (2023)
NASA Marine exhaust temperature alarm
Engine sourced from TP52 raceboat owner (250 hrs when purchased)
Complete renewal of engine systems at installation: exhaust rerouted and upsized to 60 mm, sound and heat insulation replaced
Through-hulls, strainers, hosing, fuel lines, and primary filter replaced
Electrical cabling renewed; deluxe engine panel installed at cockpit helm
New flexible coupling and new shaft installed in 2023
Prop: Max-Prop 2-blade Classic; fixed-pitch spare prop available
Extensive engine spares: turbo, starter motor, four injectors with o-rings, belts, filters, anodes
Fuel: 159 L (35 US gal) stainless steel tank with separator before primary filter
Water: two aluminum tanks, total 386 L (85 US gal)
Watermaker: Katadyn Powersurvivor 80E (serviced 2025)
Ocean Signal EPIRB1
Hero 4-person ISO 9650-1 life raft (service due 09/26)
Automatic engine compartment fire extinguisher (2023)
Two Firex lithium extinguishers (2023)
CO and smoke alarms
Bilge pumps: 1100 GPH electric (2024) plus two manual bilge pumps
Loudhailer/horn (functioning but disconnected)
Navigation and communications redundancy: AIS, VHF fixed and handheld, Iridium GO
Extensive spares and consumables for long-term cruising
Engine spares: turbo, starter, four injectors, belts, filters, anodes, fixed-pitch spare prop
Deck and rigging spares, spare blocks, winch handles, lines, fenders
Watermaker spare membrane (new 2019)
Owners purchased as a safe, high-performance, comfortable family cruiser suitable for bluewater voyaging
Refit in Spain and light use 2012–2022 including custom Flexiteek decking, new canvas, electric primaries
Major refit 2023 in preparation for offshore sailing: new standing rigging, engine, electronics and more
Proven offshore performance: comfortable motion, good upwind performance, reliable at anchor in high winds
Crossed Atlantic to Brazil and cruised to the Caribbean with family; currently offered for sale due to change in owners'' circumstances
Vessel details offered in good faith; accuracy and condition not guaranteed — buyers should instruct agents/surveyors to validate items and condition
The Sigma 41 is widely regarded as one of the most capable racer-cruisers of her generation — a design that combines lessons learned in the toughest offshore races with refined performance for ocean passagemaking. Kahu is an exceptional example, refitted from stem to stern by experienced owners and proven on the family’s Atlantic crossing from Europe to Brazil, then the subsequent cruise north to the Caribbean. Her build quality, balance under sail, and seaworthiness are hallmarks of David Thomas’s designs, while her deep fin keel and fractional rig deliver the performance and handling that make the Sigma 41 a success in offshore racing and passagemaking alike.
Below decks, Kahu is smartly laid out for bluewater voyaging, with two private cabins, two heads, real sea berths, and an efficient galley and nav area. Her systems were comprehensively upgraded between 2023 and 2025 for reliability, comfort, and self-sufficiency.
The New Zealand–flagged owners have enjoyed Kahu as a safe, powerful, and comfortable cruiser capable of excellent daily mileage. Their Atlantic and South American voyage confirmed her as a yacht that handles ocean conditions with ease and remains well-mannered and quiet at anchor. She is now offered for sale as they cruise the Caribbean.
Kahu represents an unbeatable combination of strength, recent investment, and proven bluewater ability that you can rely on to take you further, have more fun, and get there faster, too!
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 desired validated. This vessel is offered subject to prior sale, price change, or withdrawal without notice. Photos may not properly reflect the current condition of the actual vessel offered for sale. In some cases stock photographs may have been used.
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 meters. 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.
All dinghies are considered separate vessels and should have separate titles and documents. There is no guarantee as to the title of the dinghy on this vessel so Buyer accepts that while he may receive the dinghy included in the transaction, he may not receive the proper title to it.
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