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About
Lagoon 420 | Extensively Modified Performance-Oriented Cruising Catamaran
Rollercoaster is a highly customized Lagoon 420 that stands apart from any standard example on the market. Designed for owners who value the legendary comfort, layout, and livability of the Lagoon 420but want significantly improved offshore performance, motion, and safetythis vessel has undergone a professionally engineered hull transformation and comprehensive systems upgrades.
Following extensive research and consultation with experienced fabricators and naval design principles, Rollercoaster was lengthened both aft and forward, resulting in a dramatically increased waterline length, reduced pitching, improved speed, and a noticeably smoother motion in a seaway. All structural modifications were executed by Cracker Boy Boatworks (Riviera Beach, FL) and inspected during construction by a marine surveyor (survey documentation available upon request).
The result is a rare opportunity: a proven, comfortable cruising catamaran with the waterline length, reserve buoyancy, and wave-piercing characteristics typically found on much larger performance cats.
Rollercoaster is not a typical Lagoon 420. It is a thoughtfully re-engineered cruising catamaran that retains the exceptional interior volume, cockpit-galley flow, and liveaboard comfort the model is known forwhile delivering the speed, motion control, and offshore confidence of a much longer vessel.
For sailors seeking a proven, long-range cruising platform with meaningful structural upgrades, serious energy independence, and professional execution throughout, Rollercoaster represents a rare and compelling opportunity.
Specifications
SPECS
MEASUREMENTS
ENGINE(S)
TANKS
Accommodations
Hull & Structural Modifications
Extended Transoms Approx. 5 ft (1.5 m)
Eliminates submerged transoms for reduced drag
Substantially increases reserve buoyancy aft
Greatly reduces hobby-horsing in short-period seas
Improves boarding, swimming access, and deck space
Finished with Plasdeck Cool Teak (cooler underfoot, no maintenance)
Extended Axe Bows Approx. 3 ft (1 m)
Narrower, wave-piercing entry inspired by modern axe-bow research
Improves comfort and safety when motoring or sailing into head seas
Enhances overall seaworthiness and offshore capability
Net Effect
Approximately 49 ft effective waterline length
Improved passage speeds
More controlled motion in inlets and offshore conditions
Rig & Sail Inventory
Full-batten, large-roach mainsail (stock)
Furling headsail (stock)
Quantum A3 Asymmetric Spinnaker (~1,200 sq ft)
Ground Tackle & Deck Hardware
60 lb Ultra Anchor with flip swivel
Fortress FX-85 secondary anchor
200 ft of 3/8″ chain (2020)
Lofrans Project 1000 windlass
Custom heavy-duty davits
Dual swing-arm lifting davits (~300 lb each)
Integrated into solar arch
Cockpit & Exterior
Full cockpit enclosure
Cockpit dodger
Aft roll-up cockpit shades
Standard Lagoon cockpit cushions
Exterior sun screen curtains
Aft bench seating
Kayak / SUP carrier
Electrical & Energy Systems
This vessel is designed for true off-grid cruising with a highly efficient 24-volt lithium system.
House Battery Bank
4 ReLion 10.2 kWh RB24V100 LiFePO batteries (2019)
Total capacity: 12.8 kWh @ 24 volts
Solar
6 Kyocera 250-watt marine solar panels (1,500 watts total)
Panels integrated into davits and bimini for shade and efficiency
2 Outback 60A MPPT solar charge controllers
Inverter / Charging
Outback 3500-watt inverter/charger
Separate 120V / 20A circuit for high-draw galley appliances
Outback MATE network monitoring system
Starting & Legacy Systems
3 Napa 775 starting batteries
Original 12V system retained for lighting, windlass, winches, electronics
Victron step-down converters supply 24V 12V efficiently
Generator
Onan 21.5 kW generator (approx. 4,730 hours)
Plumbing & Utilities
Spectra Catalina 300 watermaker
Quick electric water heater
Panda portable washer
Electric hot water capability via solar under favorable conditions
Galley & Interior
Isotherm CR130 refrigerator
Isotherm CR90F freezer
Dual-burner induction cooktop
Sunbeam microwave
Edgestar icemaker
Lagoon blue upholstery
Lagoon standard curtains
Accommodations & Climate Control
3-cabin / 3-head owners version layout
Manual Jabsco heads
4-zone air conditioning:
(3) 8,000 BTU units
(1) 24,000 BTU unit
Navigation & Electronics
Raymarine HD color radar (2017)
Raymarine Axiom 12 chartplotter (2020)
Raymarine SmartPilot autopilot (hydraulic)
Raymarine AIS Class B transceiver
Plastimo compass
Bahamas Explorer charts
Maptech charts for U.S. East Coast & Puerto Rico
(2) Handheld VHF radios
Helm steering wheel lock tied to autopilot hydraulic valve
Propulsion & Mechanical
Twin Yanmar diesels with SD-50 saildrives
Saildrive thrust bearings upgraded to non-wearing needle bearings (2017)
Gori 2-blade folding propellers
Excellent sailing efficiency
Reduced drag
Line-shedding design
Standing rigging replaced with Staylock / Norseman fittings (2017)
Safety & Tender
ACR Global EPIRB
Walker Bay console tender w/30 HP Tahatsu outboard
Disclaimer
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.
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Excellent communication.
We had a great purchasing experience with The Multihull Company. Got us into the boat we really wanted, our broker Josie was amazing, she walked us through the entire process, negotiated the deal we wanted and gave us great advice throughout. If you are looking to purchase a boat we can’t recommend them enough.
It’s been a few weeks now and the dust has settled. We had a great experience with the Multihull Company and in particular our broker, Caroline Laviolette. Caroline was happy to share her knowledge of the market and the catamarans we were interested in purchasing. She was patient and thorough as we looked at several boats in SE Florida, helped us narrow our search and eventually purchase a beautiful 2017 Lagoon 42. Many thanks to the team at The Multihull Company!
We had a great experience purchasing our boat with Will Miller as a buyers agent. Purchasing our first large Cat is a daunting experience and Will was able to walk us through the process with ease. Will was very straight forward and constantly gave us honest feedback as well as finding and pointing out details on all the boats that we may not have noticed or thought about.
We had a great experience and would use them again.
I would specifically recommend a buyers agent when purchasing to help weed through a lot of problems and misrepresented boats on the market.
We have had great experiences with the Multihull company. We both sold our old boat through them, and bought our new boat through them. I have to say that Will Miller is top-notch, and Riley was great as our broker for selling our O day 39. when you buy a Salt or Boat through them, I feel like you are not only clients, but you are friends. The lines of communication were always open and we were always informed of everything going on.
Successful relationships cannot exist without it. At The Multihull Company we base every relationship on a firm commitment to earning and retaining our client’s trust.
Advice of any kind is valuable only when grounded in hard-won expertise. It too, must be trustworthy. Trust and expertise define the heart and soul of The Multihull Company. We are a team of skilled professionals who thrive on providing expert, trustworthy advice and service to catamaran and trimaran sailors around the globe.
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