Dufour · Sailing yacht

Dufour 412 Grand Large

The Dufour 412 Grand Large is a 12.70 m cruising yacht drawn by Umberto Felci (Felci Yacht Design) and built by Dufour Yachts in La Rochelle, France. It appeared on Dufour’s site in November 2015, for the 2016 model year, as an evolution of the Dufour 410 Grand Large, with a closed cockpit hiding an outdoor galley with barbecue and a fixed bowsprit for downwind sails; from 2019 it was called simply Dufour 412, and the model page was still online in October 2022. Every Dufour document describes the same boat: a 40 hp diesel on a saildrive, a 2.10 m keel, a 9/10 fractional rig with a furling genoa, and 2 or 3 cabins with 1 or 2 heads; Dufour never names the engine make. There is no public owner’s manual: it came in the owner’s pack with the boat, and documentation and spare parts are requested through Dufour’s owner-request form with the HIN and hull number.

Manuals & documents
Equipment & its manuals
Specifications
Good to know
Videos & how-tos
On the marketplace

Manuals & documents

Dufour publishes no owner’s manual for the 412: it came in the owner’s pack delivered with the boat, and owners ask for documentation and spare parts through the builder’s owner-request form. The other links go to Dufour’s own documents as archived copies (the technical specifications, the model pages of 2015 to 2022, the press-review page and a news item) and to a magazine report. We host nothing.

412 Grand Large technical specifications, 2015/2016: standard equipment and data sheet (Dufour’s PDF, archived copy; French and English) Archived maker page web.archive.org · PDF · FR · EN
Dufour owner requests: technical documentation and spare parts through Dufour’s experts, with the HIN and hull number (the form lists ‘Dufour 412’) Manual portal dufour-yachts.com · EN · FR · ES · IT
412 Grand Large model page, November 2015: the launch text, ‘evolution of the famous Dufour 410’ for the 2016 model year (archived) Archived maker page web.archive.org · EN
412 Grand Large technical specs page, November 2015: the launch figures (12.70 m, 8940 kg, 71 m²) (archived) Archived maker page web.archive.org · EN
Grand Large 412 model page, September 2016: data, sail plan and polar diagram, architect Umberto Felci (archived) Archived maker page web.archive.org · EN
Dufour 412 model page, September 2019: the new name, four layouts and press quotes (archived) Archived maker page web.archive.org · EN
Dufour 412 model page, February 2021: four layouts with 7 or 9 berths, data unchanged (archived) Archived maker page web.archive.org · EN · FR
Dufour 412 model page, October 2022: the last archived copy, with the boat still in Dufour’s range (archived) Archived maker page web.archive.org · EN
Dufour’s press-review page for the 412: seven magazine articles and tests from 2015 to 2018 (Journal du Nautisme, Vela e Motore, Nautica y Yates, Voile Magazine, Sailing Today, Canadian Yachting, Giornale della Vela) (archived) Archived maker page web.archive.org · EN
Dufour news, August 2016: the new films of the D412 and D512 Grand Large (archived) Archived maker page web.archive.org · EN
Dufour 412 & 512: new names, but little change, the update of the 410 and 500 Grand Large (Michael Good, YACHT, 17 November 2015) Boat test yacht.de · EN · DE · FR · IT

Equipment & its manuals

Standard equipment as the builder’s documents list it. Boats were ordered with options and refitted since — check what is actually aboard.

Item	Model	Manual / page	Note
Engine	Diesel 40 hp (29.1 kW)^1,2,3,4,5,6All boats: 40 hp (29.1 kW) diesel on a saildrive in the technical specifications and on every model page from 2015 to 2022; Dufour names no make or model	—	Technical specifications: heat-exchanger cooling with anti-siphon valve, sea-water strainer, emergency fuel shut-off valve, engine panel with hour meter, stop and rev counter, alternator with battery isolator, two natural air inlets and an electric extractor fan, separate engine bilge. The engine is reached from the front, under a hinged wooden cover on gas struts at the companionway, and from both sides. Read the engine plate before ordering filters, impellers or belts.
Saildrive	Saildrive¹All boats; the technical specifications say only ‘sail-drive’, make and leg type not named	—	Read the plate on the leg before ordering seals, anodes, gear oil or a propeller.
Propeller	2-blade fixed¹Fixed two-blade propeller in the technical specifications; make and size not named	—
Steering	Wheel steering¹Wheel steering on a polyester helm console, two compasses on columns, engine control at the starboard helm; semi-elliptical rudder filled with closed-cell epoxy foam on a solid stainless-steel stock	—	The emergency tiller fits the head of the rudder stock under the helmsman’s floor.
Winches	—¹Technical specifications: 1 halyard winch on the coachroof and 2 genoa-sheet winches on the cockpit coamings; sizes and make not named	—	Also listed: 2 deck organisers with 4 and 3 sheaves, 2 rows of jammers at the companionway, a jammer for the furling line at the aft end of the side deck and 2 winch handles with a holder.
Windlass	—¹Technical specifications: windlass mount built into the anchor locker, no windlass in the standard list	—	Self-draining anchor locker with a chain eyebolt and a lockable lid. Dufour names no windlass make, so check what was fitted later before ordering a gypsy or motor parts.
Furler	—¹All boats: genoa roller furler; make not named	—
Mast & rigging	9/10 fractional, aluminium^1,7All boats: deck-stepped anodised aluminium mast with two sets of swept spreaders, 9/10 fractional rig, anodised aluminium boom with 2 continuous reefing lines; make not named	—	Continuous single-strand stainless standing rigging with chrome-plated bronze rigging screws (forestay, twin backstay, intermediate and lower shrouds), mainsheet track on the coachroof, 6-part kicker, rig earthed. The fixed bowsprit for downwind sails was one of the new features of the 412 on Dufour’s 2015 page.
Sails	—^1,4Mainsail with 2 wide reefs, battens and bag; Dacron furling genoa with UV strip; sailmaker not named	—	The Vela e Motore test quoted on Dufour’s 2019 page mentions a self-tacking jib as a possibility.
Toilet	Manual marine toilet^1,4,5Technical specifications: manual sea toilet in the aft head and, depending on the layout, in the forward head; make not named	—	Wash-basins drain directly through an electric pump and the shower water is pumped straight overboard; the list gives no holding-tank details. The 2019 to 2022 pages show layouts with 1 or 2 heads.
Fridge	—¹Technical specifications: galley refrigerator opening from the front and from the worktop; make, volume and voltage not named	—
Stove	2-burner gas cooker with oven¹Gimballed two-burner gas cooker with oven, removable wooden cover and stainless rail; make not named	—	Gas bottle in an aft cockpit locker: the French text of the specifications says port, the English text starboard.
Barbecue	Outdoor galley^7,3,82015–2016 model pages: the closed transom with aft seats conceals an outdoor galley with barbecue, sink and refrigerator; YACHT describes the small grill station as an option	—
Water heater	—¹Water heater heated by the engine through the heat exchanger; capacity not stated	—
Water pump	—¹Pressurised fresh-water pump unit; hot and cold water in the galley and heads, a shower in the port stern locker; make not named	—	Two polyethylene water tanks with inspection hatches and electric gauges, two water deck fillers.
Bilge pump	—¹One electric pump with strainer, switched at the panel, and one manual pump worked from the cockpit; makes not named	—	The bilge sump is built into the keel, with access to the strainer; the engine has its own bilge.
Batteries	12 V¹12 V system; number and capacity of the batteries not stated	—	One isolator per battery bank in the aft port cabin, distribution panel with 15 circuits on circuit breakers and a voltmeter, a 12 V socket at the panel, engine alternator with battery isolator. No battery charger is listed.
Instruments	—¹Not in the standard list: the chart table has room for optional electronics; makes not named	—	The instrument transducers are reached from the forward cabin. Dufour names no instrument, autopilot or plotter, so read the units actually fitted before ordering.
Hatches & ports	6 deck hatches¹6 deck hatches, 2 large fixed and 2 opening coachroof ports, hull portholes (6 in the French text, 8 in the English one), 2 built-in ventilators; makes not named	—
Swim platform	Tilting stern door^1,8All boats: stern door that swings up, with a built-in telescopic stainless bathing ladder; a dedicated locker for the liferaft	—	YACHT (November 2015) describes the closed transom with side access to the bathing platform as new on the 412.
Deck covering	—¹Slatted teak cockpit seats, wooden handrails on the coachroof, solid wooden toe-rail, moulded non-slip on deck and cockpit floor	—

Specifications

Length overall	12.70 m on every model page from 2015 to 2022; 12.35 m in the technical specifications PDF (2015/2016)^2,3,4,5,6,1
Hull length	11.98 m^1,2,4,5
Waterline length	11.15 m^1,2,4,5
Beam	4.20 m^1,2,4,5
Draft	2.10 m, the only draft Dufour gives^1,2,4,5,6
Keel	Bolted keel; the keel bolts bear on stainless-steel back-plates, and the bilge sump is built into the keel¹
Ballast	2600 kg keel weight^1,2,4,5
Displacement	8940 kg light displacement^1,2,4,5
Sail area	71 m² (mainsail 38 m² + genoa 33 m²)^1,2,4,5
Mainsail	38 m², battened, with 2 wide reefs on continuous reefing lines^1,4
Genoa	33 m², Dacron, on a furler with UV strip^1,4
Rig dimensions (I, J, P, E)	I 14.50 m, J 4.30 m, P 13.92 m, E 4.70 m, LP 4.61 m; 9/10 fractional rig (technical specifications)¹
Engine	40 hp (29.1 kW); make not named by the builder^1,2,4,5,6
Drive	Saildrive¹
Fuel tank	200 l, under the starboard aft berth, gauge on the electrical panel^1,2,4,5
Water tank	380 l in 2 polyethylene tanks, under the forward berth and the port aft berth^1,2,4,5
Cabins	2 or 3, with 1 or 2 heads (four layouts on the 2019 to 2022 pages)^4,5,6
Berths	4 (2 cabins) or 6 (3 cabins) on the 2019 page; 7 (2 cabins) or 9 (3 cabins) on the 2021–2022 pages, which do not say where the extra berths are^4,5,6
Berth sizes	Forward cabin approx. 200 × 140 cm, aft cabins approx. 200 × 160 cm; 10 cm foam mattresses¹
Designer	Umberto Felci (Felci Yacht Design)^1,3,4,5
Builder	Dufour Yachts SAS, La Rochelle (France)^1,9
Hull	Hand-laid polyester/glass hull with NPG gelcoat and a first layer in NPG resin against osmosis, counter-moulded inner structure with floors laminated to the hull; injection-moulded sandwich deck with a foam core^1,3,5
Versions	One boat under two names: 412 Grand Large on the 2015–2016 pages and in the technical specifications, Dufour 412 from the 2019 page on. Four layouts on the 2019 to 2022 pages: 2 cabins with 1 or 2 heads and 3 cabins with 1 or 2 heads, all with an L-shaped galley (the technical specifications describe a longitudinal galley). Interior in Moabi veneer and solid Moabi. A single engine (40 hp) and a single keel (2.10 m) in all of Dufour’s documents^7,3,1,4,5,6
Years built	Model year 2016: on Dufour’s site from November 2015, with ‘Year: 2016’ on the model pages of 2016 to 2022; still in Dufour’s sailing-yacht range in October 2022, and no longer in the 2026 range. Dufour gives no end date and no production figure^7,3,4,5,6,10
Predecessor	Dufour 410 Grand Large (Dufour: ‘evolution of the famous Dufour 410’)^7,3,8

Good to know

Dufour names no make for the engine, saildrive, winches, windlass, toilets or electronics, neither in the technical specifications nor on any of its 412 pages from 2015 to 2022; broker listings that do are not the builder’s word. Read the plates on what is actually fitted before ordering filters, impellers, saildrive seals or windlass parts.^1,4,5,6
Dufour gives two overall lengths: 12.70 m on every model page from 2015 to 2022 and 12.35 m in the technical-specifications PDF, with the same 11.98 m hull length in both. Check which figure a marina, insurer or transport quote uses, and measure the boat if in doubt.^2,5,6,1
Don’t mix up the 412 with the Dufour 410 Grand Large it was developed from: Dufour calls the 412 an evolution of the 410 with a closed cockpit hiding an outdoor galley and a fixed bowsprit, the Vela e Motore quote on Dufour’s page says the fixed bowsprit replaced the 410’s retractable one, and YACHT calls the other changes marginal. Say which boat you have when ordering canvas, cushions or stern and bow fittings.^7,4,8
Know the emergency steering before you need it: the emergency tiller fits the head of the rudder stock under the helmsman’s floor. The engine is reached from the front under the hinged companionway cover and from both sides; a double bulkhead separates the engine bay from the aft cabins.¹
Where things are for surveys and refits: diesel (200 l) under the starboard aft berth, fresh water (380 l in two tanks) under the port aft berth and the forward berth, the battery isolators in the aft port cabin and the instrument transducers in the forward cabin; the bilge sump with its strainer is built into the keel.¹
There is no public owner’s manual: the technical specifications list an owner’s pack with the owner’s manual delivered with the boat. If it is missing, or for spare parts, use Dufour’s owner-request form, choose Dufour 412 and give the HIN and hull number; Dufour passes the request to an expert for your sailing area.^11,1

Videos & how-tos

Links to YouTube, nothing embedded. The maker’s own channel comes first; the rest are channels we found clear and correct for this model.

Dufour 412 Grand Large: the builder’s film of the 2016 model year Video Dufour · maker’s channel · EN · 2 min
Dufour 412 tested and reviewed by Sailing Today Video Sailing Today · EN · 3 min
Deck and interior walkaround of the new 412 Grand Large at the 2015 Paris boat show Video BoatTube · EN · 6 min

On the marketplace

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Sources

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