Lagoon 42 – Catamaran
Photo: Craig Doring, Bahamas Catamaran Charters, CC BY 2.0, via Flickr

Lagoon · Catamaran

Lagoon 42

The Lagoon 42 is a 12.80 m cruising catamaran designed by VPLP, with exterior styling by Patrick Le Quément and interiors by Nauta Design, built by Lagoon (CNB, Groupe Beneteau, based in Bordeaux) at its two Vendée yards in Poiré and Belleville, with three or four cabins. Lagoon launched it in 2015 and the first boats were sailing in 2016; the 1,000th hull was completed in November 2023, and Lagoon now shows the standard 42 as its previous model next to the four-cabin 42 Millenium limited edition. Two 45 hp Yanmar 4JH45 were standard for most of the run, and Lagoon’s pages list 2 × 57 hp from September 2023. Lagoon publishes no owner’s manual for the 42 online: its help centre points you to your dealer, or Lagoon sends the PDF by e-mail on request.

Manuals & documents

The links go to Lagoon’s own documents — some as archived copies of pages the maker has since taken down. We host no manuals or drawings.

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.

ItemModelManual / pageNote
EngineYanmar 4JH45 × 21,2,3,4,5,6,7,8Standard 2015–2023: 45 hp common rail with saildrive in the inventories of October 2015, April 2018 and July 2020, the brochures up to 07/2020 and the configurator 2019–2022; Lagoon’s page still showed 2 × 45 hp in March 2023Yanmar 4JH45 / 4JH57 Parts & service pageFixed two-blade propellers, raw-water filter and mechanical throttles at the helm as standard. A boat from about 2023 on may have the 4JH57 instead: read the engine plate before ordering filters, impellers or belts.
EngineYanmar 4JH57 × 26,9,7,10,11,3Option in the configurator of 2019, 2020 and 2022 (the inventories say “up to 2 × 57 hp CR”); standard 2 × 57 hp on Lagoon’s pages from September 2023 and on the 42 MilleniumYanmar 4JH45 / 4JH57 Parts & service pageLagoon’s pages from 2023 give only 2 × 57 hp; the 4JH57 designation comes from the configurator lists. The 42 Millenium page states the engine warranty as Yanmar only.
SaildriveSaildrive × 21,2,3All years (inventories 2015, 2018 and 2020); Lagoon does not name the leg—Read the plate on each leg before ordering anodes, seals or oil.
PropellerFixed 2-blade × 23,6,7Standard in all inventories; option: a pair of three-blade folding propellers (configurator 2019–2022)—Makers not named.
Winches46.2 STA × 3 / × 21,2,3,6,7Manual self-tailing winches: three in the October 2015 preliminary inventory, two in the April 2018 and July 2020 inventories—Options: electric winch 46.2 STAEH to port (Essential pack) and a second one to starboard (configurator 2019–2022). Lagoon does not name the maker: check the winches aboard before ordering spares.
Windlass12 V · 1000 W · 10 mm1,2,3All years (inventories 2015, 2018 and 2020): vertical windlass with a gypsy for 10 mm chain—Maker and model not named: read the plate on the windlass. Windlass and chain locker are reached through a hatch forward to starboard.
Anchor20 kg · 60–75 m × 10 mm · 20 m × 18 mm6,9,7Option “anchor set-up”: 20 kg anchor with 60 m of 10 mm chain (2019 configurator) or 75 m (2020 and 2022) and 20 m of 18 mm warp—Anchor make not named. The inventories list the windlass and bow roller but no anchor.
SteeringØ 800 mm1,2,3All years (inventories 2015, 2018 and 2020): leather-covered stainless steel wheel at the helm station—Lagoon’s documents do not describe the steering gear itself (cables, gear, autopilot drive).
AutopilotB&G6,9,7,3Option: B&G autopilot remote; “Navigation pack B&G” in the Essential pack (configurator 2019–2022, named B&G 2019, B&G 2020 and B&G)—The lists do not name the autopilot computer or drive.
ChartplotterB&G Zeus3 12″6,9,7,3Option at the chart table and/or the helm, configurator 2019, 2020 and 2022; no plotter as standard (the chart table has a panel ready for electronics)B&G Zeus 3 / 3S / S Parts & service pageThe same lists offer B&G VHF (V50 with H50 handset in 2019/2020, V60 with H60 in 2022), the AIS 500 transceiver, B&G 4G radar (2019/2020) or Halo20+ (2022) and a Forward Scan sounder.
Toilet—1,2,3Manual marine toilet in every bathroom (inventories 2015, 2018 and 2020)—Maker not named; check the label on the toilet before ordering pump or seal kits. Holding tanks: see the specifications.
ToiletQuiet Flush6,9,7Option: electric “Quiet Flush” toilets in the 2019 configurator; “sea water electrical toilets” in the 2020 and 2022 lists—Maker not named in Lagoon’s lists; check the toilet before ordering parts.
Fridge130 l2,3,1,6,7Galley fridge to port, all years (inventories 2018 and 2020; the October 2015 inventory calls the same item a 130 l freezer)—Options: an extra 100 l top-opening fridge or a 100 l top-opening freezer (not both), a cockpit fridge (95 l in 2018, 150 l from 2020) or a 220 V ice maker in the cockpit. Makers not named.
StoveGas, 3 burners + oven1,2,3All years (inventories 2015, 2018 and 2020); maker not named—One 10 kg gas bottle under the L-shaped cockpit bench. Boats for the US have a propane circuit with a solenoid valve (July 2020 inventory).
Water heater40 l · 220/230 V1,3,2Electric, with an engine heat exchanger: 220 V in the October 2015 inventory, 230 V in the July 2020 inventory—Maker not named. Fresh water comes from one main pump unit in the aft port engine compartment.
Bilge pumpManual + 2 electric, per hull1,2,3All years: in each hull a manual pump worked from the cockpit, an automatic submersible electric pump and a non-submersible electric pump with a manual switch—Makers and flow rates not given.
FurlerSelf-tacking jib1,3All years: furler at the foot of the forestay, with a pre-stretched furling line—Maker not named. The furler’s fixing point and the bow roller are on the anodised aluminium crossbeam.
Batteries12 V: 2 start + 2 × 140 Ah service1,2,3,6,9Acid batteries in the inventories of October 2015, April 2018 and July 2020 (start batteries listed as 110)—Essential pack: two more 140 Ah service batteries. Options: gel (2015, 2019) or AGM (2020) batteries instead of acid, a 12/220 V inverter and three 120 W flexible solar panels on the roof. Two 12 V 125 A alternators charge the batteries. Makers not named.
Charger40 A6,7,3Part of the Essential pack, with a battery controller (configurator 2019–2022); not in the base inventories—Maker not named.
GeneratorOnan 11 kVA · 220 V / 50 Hz6,9,7,3,4Option with sound shield, configurator 2019, 2020 and 2022 (spelled “ONON” in the 2020 and 2022 lists)—Lagoon gives no model designation: read the plate before ordering parts. The generator sits in a forward cockpit locker and rules out the second 300 l water tank; the inventories put that locker to port, the 2016 brochure to starboard, so check your boat.
WatermakerSea Recovery 12 V · 63 l/h6,9,7,3Option, configurator 2019, 2020 and 2022 (63 l/h, 17 US gal/h)—Lagoon gives no model name. Generator, watermaker, air conditioning and inverter are switched from the electrical panel at the starboard companionway.
Air conditioningCruisair 48000 BTU · 220 V6,9,7Reverse-cycle air conditioning, option, configurator 2019, 2020 and 2022—A diesel heater with a water circuit was a separate option (maker not named).
DinghyHonda BF206,7Option: dinghy set CL 340 with Honda BF20 outboard, configurator 2019, 2020 and 2022Honda BF20 Parts & service pageAlso optional: an outboard bracket on the pushpit (max. 60 kg) and a dinghy hoist; the 2022 list puts a stainless hoist with a manual winch in the Essential pack.
Alternators12 V · 125 A × 21,2,3All years (inventories of October 2015, April 2018 and July 2020)—Maker not named.
AntifoulingSeajet 039 Platinium Grey6,7Factory option with epoxy primer, configurator 2019–2022—Lagoon’s option list only; your boat’s yard paperwork shows the paint actually applied.

Specifications

Length overall12.80 m (42′) in Lagoon’s inventories and brochures 2015–2020; Lagoon’s pages: 13.32 m (43′8″) in April 2024, from 2025 13.22 m (43′4″) overall including options3,1,12,13,14
Hull length12.79 m (42′) on Lagoon’s pages from 202513,14
Waterline length12.50 m (41′)3,1,2
Beam7.70 m (25′3″) in the 2015–2020 inventories and on Lagoon’s pages up to April 2024; 7.68 m (25′2″) from 20253,1,12,13,14
Draft1.25 m (4′1″); 1.26 m (4′2″) on Lagoon’s pages from 20253,1,12,13
Displacement12 t light (EC) in the October 2015 preliminary inventory and the December 2015 brochure; 12.1 t in the 2018 and 2020 inventories, on Lagoon’s pages and in the 2025 brochure1,15,2,3,16
Air draft20.65 m (67′9″) above the waterline in the 2015–2023 documents; 20.6 m (67′7″) on Lagoon’s pages from 20253,1,4,13,14
Sail area90 m² upwind with the standard mainsail, 94 m² with the square-top mainsail (July 2020 inventory); Lagoon’s pages and the 2025 brochure give 94 m²3,1,5,14,16
Mainsail55 m² full-batten high-roach mainsail; square-top mainsail 59 m² as an option3,1,14
Genoa35 m² self-tacking jib on a furler; Code 0 as an option: 68 m² in the 2015–2023 documents, 78 m² on Lagoon’s pages from 20253,1,13,14
Engine2 × 45 hp common rail as standard (inventories 2015–2020, brochures to 07/2020, Lagoon’s page of March 2023), option 2 × 57 hp (configurator 2019–2022); 2 × 57 hp as standard on Lagoon’s pages from September 20233,1,5,8,7,10,14
Fuel tank300 l (79 US gal) in one rotomoulded tank as standard; 600 l with the second 300 l tank of the Essential pack (2018 and 2020 inventories, configurator 2019–2022); Lagoon’s pages: 600 l (159 US gal) from September 2023, 570 l (151 US gal) from 20253,2,7,10,13
Water tank300 l (79 US gal), forward to port; option: a second 300 l tank forward to starboard, not together with the generator; the 2025 brochure gives 600 l as the maximum3,2,1,16
Holding tank80 l per tank: one tank in the October 2015 preliminary inventory (aft port head with 4 cabins, owner’s head with 3); one per head in the 2018 and 2020 inventories, so 3 × 80 l or 4 × 80 l3,2,1
Cabins3 cabins and 3 bathrooms or 4 cabins and 4 bathrooms, each version with two separate showers (brochures); 42 Millenium: 4 cabins only3,4,11
Berths6 to 123,14
CE categoryA: 12 people, B: 14, C: 20, D: 30 (still “requested” in the December 2015 brochure)3,1,15
HullPolyester with anti-osmosis resin; hulls and deck infused (the July 2020 inventory also lists the coachroof as infused, the 2015/2016 brochures describe it as injection-moulded); balsa-core hulls with solid laminate below the waterline (2015 and 2018 inventories), balsa-core bridgedeck and deck, plywood bulkheads laminated or bonded3,2,1,15
DesignerVPLP Design (naval architecture); Patrick Le Quément (exterior design); Nauta Design (interior)3,4,14
BuilderLagoon (Constructions Navales Bordeaux, Groupe Beneteau), seat in Bordeaux; built at two yards in the Vendée, Poiré and Belleville (Lagoon, 2023)16,17
Versions3 cabins (owner’s version) or 4 cabins from the start. Lagoon’s documents show these changes: October 2015 preliminary inventory with three winches and one holding tank; April 2018 and July 2020 inventories with two winches and a holding tank per head; standard engines 2 × 45 hp up to 2023, 2 × 57 hp from September 2023; revised figures on Lagoon’s pages from 20251,2,3,8,10,13
VersionsEssential equipment pack: a second 300 l fuel tank under the floor of the aft port cabin, two more 140 Ah service batteries, a 40 A charger with battery controller, an electric winch to port and the B&G navigation pack with a USB outlet at the helm; the 2022 list adds a stainless dinghy hoist with a manual winch6,7,2,3
Versions42 Millenium: limited edition with four cabins only and its own equipment list (not itemised by Lagoon), 2 × 57 hp; on Lagoon’s site from at least May 202411,18,16
Years builtLaunched in 2015, boats sailing from 2016; 100th hull launched in March 2017, 1000th completed in November 2023; Lagoon now lists the standard 42 as its previous model17,19,14
Hulls builtMore than 1000 (the 1000th was completed in November 2023)17,11

Good to know

  • Lagoon’s recall of fixed Goiot emergency hatches applies to catamarans built 2007–2019 that have them, a span that includes 42s built up to 2019; the notice names no models (Lagoon’s 2020 press release speaks of hatches delivered before September 2018). The fix is a set of retaining brackets that hold the glass if it comes loose, and Goiot now recommends replacing these hatches every 10 years, kit or not. If a boat has not been treated, contact a Lagoon dealer or service centre with the model and the HIN.20,21
  • The standard engine changed: every inventory and brochure up to 2020 names the Yanmar 4JH45 (45 hp), Lagoon’s old site still showed 2 × 45 hp in March 2023, and the new site lists 2 × 57 hp (the 4JH57 of the configurator) from September 2023. The 57 hp engine was also an option from 2019, so read the engine plate before you order filters, impellers or belts.3,8,10,6
  • Lagoon’s own figures for the 42 changed over the years: 12.80 m long in the 2015–2020 documents, 13.32 m overall on the 2024 page and 13.22 m (hull 12.79 m) from 2025; beam 7.70 m, later 7.68 m; fuel 300 l standard or 600 l with the second tank, 570 l on the 2025 page. A listing with other figures is not necessarily a different boat: compare it with the Lagoon document of its build year.3,12,13,14
  • Used 42s differ a lot in equipment because much of it came in packs: the Essential pack adds a second 300 l fuel tank under the aft port cabin floor, two more 140 Ah batteries, a 40 A charger, an electric winch to port and the B&G navigation pack. Electronics, generator, watermaker and air conditioning were separate options. Ask the seller for the original order or specification.7,6,3
  • Match the inventory to the build year: the October 2015 preliminary list (launch boats) has three winches, a single 80 l holding tank and light oak joinery; the April 2018 and July 2020 lists have two winches, a holding tank per head and walnut joinery, and the 2020 list adds a touch-screen panel for the tank gauges.1,2,3
  • The 42 Millenium is a four-cabin limited edition with its own equipment list, which Lagoon’s page does not itemise: ask the dealer for it before you order parts. Lagoon also shows a Seanapps on-board unit and phone app on this model for remote checks of batteries, tanks and maintenance.11,18

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Sources

  1. web.archive.org/web/20151231084027/http://www.cata-lagoon.com/documentation/pdf/specs_LAG…
  2. web.archive.org/web/20191018105735/https://api.cata-lagoon.com//images/page/l/a/lagoon-42…
  3. web.archive.org/web/20201027053540/https://api.cata-lagoon.com/images/ged/l/a/lagoon-42-s…
  4. web.archive.org/web/20191018105729/https://api.cata-lagoon.com//images/page/0/9/09-10-lr-…
  5. web.archive.org/web/20200924174404/https://api.cata-lagoon.com/images/ged/w/e/web-07-2020…
  6. web.archive.org/web/20190330143327/https://www.cata-lagoon.com/en/42/configuration
  7. web.archive.org/web/20220925113220/https://www.cata-lagoon.com/en/42/configuration
  8. web.archive.org/web/20230331004148/https://www.cata-lagoon.com/en/42
  9. web.archive.org/web/20200813053840/https://www.cata-lagoon.com/en/42/configuration
  10. web.archive.org/web/20230929202956/https://www.catamarans-lagoon.com/boats/lagoon-42
  11. catamarans-lagoon.com/boats/lagoon-42-millenium
  12. web.archive.org/web/20240418074632/https://www.catamarans-lagoon.com/boats/lagoon-42
  13. web.archive.org/web/20250316194831/https://www.catamarans-lagoon.com/boats/lagoon-42
  14. catamarans-lagoon.com/boats/lagoon-42
  15. web.archive.org/web/20160127132830/http://www.cata-lagoon.com/documentation/pdf/Lagoon42_…
  16. emailing.catamarans-lagoon.com/brochures/01tAX000000FEp4YAG.pdf
  17. catamarans-lagoon.com/news/article/lagoon-celebrating-its-1000th-lagoon-42
  18. web.archive.org/web/20240524215033/https://www.catamarans-lagoon.com/boats/lagoon-42-mill…
  19. web.archive.org/web/20190929203212/https://www.cata-lagoon.com/de/news/10/der-100-lagoon-…
  20. catamarans-lagoon.com/news/article/recall-goiot-products
  21. web.archive.org/web/20230429235612/https://api.cata-lagoon.com/images/editor/press-releas…

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