2003 Neptunus 56' _{(17.07 m)} Flybridge Motor Yacht

Vessel Walkthrough

This 56' Neptunus "Flybridge Model" offers more than any other similar size yacht with her three generous staterooms, two heads, a lower helm station, an on-deck galley and dining options forward of the galley or on the flybridge.

The interior has the perfect blend of high gloss cherry joinery, padded crème Ultra Leather paneling, ultra suede fabrics with many relaxing areas and large cedar lined closets are throughout this yacht.

The deck plan of the main deck, below deck and flybridge are unique only to Neptunus designs. The Neptunus Space planning is excellent and needs to be seen to be appreciated.

Upon entering the aft deck, with built in seating, a hi-lo and table and port and starboard access to the side decks, the same deck level Salon is entered via a centerline door. There is seating to both port and starboard with the full galley two steps up on the port side. Forward of the galley is ample dinette seating to port with the lower helm to starboard. Just aft of the lower helm are the curved steps to the accommodations below. The Master is aft with an ensuite head. Forward to starboard is a twin lower berth guest cabin. All the way forward is the VIP. The shared guest head is to port opposite the guest cabin.

She is turnkey and ready for overnight cruising with the following updates.

• New Garmin 8416 MFD, 6/2024
• New Garmin Radar, 6/2024
• New Garmin AIS 800, 6/2024
• New Tides Seals, port and starboard, 9/2024
• New Alternators, port and starboard, 9/2024
• New Engine Mounts, both engines, 9/2024
• Rear Main Seals Replaced, both engine, 9/2024
• New ZF 325 Transmissions, port and starboard, 9/2024
• New Turbos, port and starboard, 9/2025
• Hydraulic Steering Piston Rebuilt, 9/2024
• Hydraulic Lift Hoses Replaced / Pump rebuilt, 2/2025
• New Cutlass Bearings, 2/2025
• New Rudder sleeves, 2/2025
• Generator oil/fuel filters and impeller replaced, 4/2026
• New Aftercoolers, port and starboard, 7/2025
• New 2 drawer refrigerator in galley,10/2024
• New refrigerator – Galley, 10/2024
• New Ice Maker, 4/2026
• New flybridge refrigerator,11/2025
• New LG TV, 10/2024
• New Permateek flooring in cockpit and flybridge, 3/2025
• Front Pilot Windows Re-bedded, 3/2025
• Salon Windows Re-Sealed, 3/2025
• New 104lb Mantus Anchor and New Mantus Roller, 3/2025
• New Fusion 3 zone stereo, and new Scar Speakers, 4/2025
• New Hi-Low Cockpit Table, 4/2025
• New Discharge Hoses, 7/2025
• New 5 Blade Veem Props, 7/2025
• New FB Deck Pad, 8/2025
• New White Stamois and Black Mesh Window Screen, 8/2025
• New Blinds in Salon, 12/2025
• New SeaWater Pro 40 GPH water maker,1/2026
• New 600AH Renogy Lithium Batteries,1/2026
• New Victron MultiPlus 3000W Charger/Inverter, 1/2026
• New Victron Orion DC/DC Charger, 1/2026
• New Victron Cerbo, (remote monitoring) 1/2026
• New Toilet Boards/duckbills/macerators with Bluetooth controls, 4/2026
• New 11 Gallon Water Heater, 10/2024
• Both engines rebuilt 2026 with 50 hours
• New Flybridge Windshield Panels, 9/26
• Above rub rail wax and polish 9/26

Salon

The Salon is entered via a curved “Trend” stainless steel sliding door with a sliding insect screen and lined silk drapery. The entire main deck is open with two levels of accommodation. To port is an L-shaped creme Ultraleather sofa with storage below the cushions. An oval cherry and burl wood coffee table lies in front of the settee.

To starboard is a matching Ultraleather curved two-person settee with cherry arm rests with storage below the cushions. Just forward of the settee is a built-in LG 30” LG LED TV with a cherry countertop above. Above is a cabinet with Clarion AM/FM/CD/Sat radio.

Also in the salon are the Neptunus signature bi-level cabin side windows each with new Duette shades (12/25) and an upholstered panel between. Additional equipment includes Clarion stereo speakers, a Clarion subwoofer, a Walvac central vacuum unit and outlet, digital Marine Air A/C controls. Seven halogen mini spots on a dimmer and rope lighting behind the upper valance provide lighting.

Galley

This open floor plan leads you forward and up two steps into the full galley. The galley’s design is U-shaped to port and includes the following features:

• Cherry plank flooring
• Avonite countertops
• Double stainless steel under mount sink 
• Single lever faucet with removable sprayer
• Separate stainless steel soap dispenser
• AEG four burner Ceran type cook top
• Exhaust fan
• Toshiba microwave oven concealed behind a cherry door
• Dometic under counter refrigerator (new 10/24)
• Built-in small freezer to starboard
• (2) Isotherm under counter stainless steel refrigerator drawers (new 10/24)
• InSinkErator disposal
• (10) Halogen mini spots 
• (11) Cherry cabinet doors for storage space
• One cherry drawer
• Portside windows with new mini blinds

Dining Area

One step up from the galley is the yacht’s dining area on the port side just ahead of and open to the galley.

A curved four person settee faces aft but offers an excellent view out the large forward and side windows. A unique burl wood and cherry table folds in half for easy entry/exit. 

Also in this area is a skylight to the lower companionway, another Marine Air digital A/C control and two directional halogen mini spots over the table.

The sole of this area is carpeted.

Lower Helm

To starboard on the same level as the dinette is a complete lower helm with an Ultra Leather oversize helm bench with storage below. Five cherry cabinets below the Helm offer extra storage space and equipment access. 

Equipment at the lower helm includes:

• (2) CAT LCD engine monitors
• Simrad AP20 autopilot
• Simrad 4” data screen
• West Marine digital weather station
• Dino tilt wood steering wheel
• ZF electronic controls with synchronizer (new 9/24)
• Bennett trim tab controls 
• Fireboy Halon override controls
• (3) Windshield wiper/washer controls (arms removed)
• Air horn control
• (4) Bilge pump switches with (3) bilge pump counters & alarm
• Generator on indicator
• Defogger controls
• 5" Ritchie Power Damp magnetic compass
• Red overhead navigation light
• 12V outlet
• (2) Stereo speakers
• Just aft of the lower helm is a countertop with a top access cabinet and an additional storage cabinet facing the galley.

Companionway

To the starboard side opposite the galley are seven curved carpeted steps, LED step lights, a bookshelf and an opening stainless steel porthole halfway down the stairs. The yacht's main electrical panel is near the top of the steps. For ease of access and ready viewing the door has been removed, but is stored aboard for re-installation as desired.

At a landing at the bottom of the steps is a Whirlpool Thin twin heavy duty washer dryer in a cedar lined locker behind cherry doors.

Continuing forward are carpeted steps going up, a skylight to the dining area above, equipment access below the sole, cherry handrails and LCD mini lights at the steps. 

Master Stateroom

At the bottom of the companionway is an arched cherry doorway that accesses the master cabin. A raised platform berth with two storage drawers and rope lighting below is positioned off the port aft corner maximizing the floor space of the cabin. Brass reading lamps flank the upholstered headboard that sits upon a mirrored bulkhead. To port is cabinetry forming a nightstand with a drawer below, a two door cabinet above and two opening stainless steel portholes with wool blinds above. Next forward is access to the ensuite head.

To the starboard side of the berth is a nightstand with three drawers below and an adjacent vanity area with one additional drawer, between them is a cherry cabinet.

Next forward is a large cedar lined closet with a light, hidden storage, a digital safe and a dressing mirror inside the door. Also in the locker are all the battery inverter/chargers.

At the foot of the berth is a cabinet with a drawer and two doors below. Above is a custom TV cabinet with a 22" Westinghouse LCD TV built in facing the bed. Below is a Clarion AM/FM/CD player.

Also in this cabin are Clarion stereo speakers, a CO detector and six overhead mini halogen lights with two dedicated as reading lights. The sole is carpeted.

Master Head

Two steps up from the master is the private head with a marble tile sole, bow front vanity cabinet with an undermount sink on the Avonite countertop. Above are four mirrored front medicine cabinets. Below the medicine cabinets is an opening stainless steel porthole with Duette shades. The toilet is a Raritan Atlantis model. The stall shower has a tempered door, a light, handheld or wall mounted fixture, a light, a fiddled shelf and an exhaust fan.

Plenty of mirrors and three halogen mini spots offer excellent lighting, the overhead is also mirrored. 

Starboard Guest Cabin

Forward through the center companionway and up three steps is the starboard guest cabin with twin lower berths. Between the berths is a three-drawer cherry nightstand. Beneath each berth is one large and two small drawers.

The outboard berth has two opening stainless steel portholes with new mini blinds and five cherry cabinet doors above.

At the foot of the outboard berth is a cedar lined hanging locker with an auto light. A 15” LCD TV and a Clarion AM/FM/CD stereo face the berths. 

Also in this cabin is a full size dressing mirror, two reading lights, digital A/C controls, two Clarion stereo speakers and rope accent lighting at the valance. The sole is carpeted. A hinged access panel gives great access to the back of the helm and associated electronics. 

Guest Head to Port

Across the companionway from the starboard guest cabin is the guest head with two access doors, one from the center line companionway, the other from the VIP. It features a marble tile sole, bow front vanity cabinet with an undermount sink on the Avonite countertop. Above there are three mirror-front medicine cabinets. Below the medicine cabinets is an opening stainless steel porthole with Duette shades. The toilet is a Raritan Atlantis model. The stall shower has a tempered glass door, handheld or wall mounted fixture, a light, a soap dispenser and an exhaust fan.

Plenty of mirrors including the overhead and three halogen mini spots offer excellent lighting.

VIP Cabin

All the way forward is the spacious VIP cabin with a centerline queen size berth with two drawers and rope lighting beneath the berth. The forward bulkhead is mirrored with an upholstered headboard affixed to the mirror. To both port and starboard are cherry countertops to serve as nightstands. Also to port and starboard are seven stbd. and six port cherry cabinet doors. Below is one opening stainless steel porthole on both the port and starboard sides with rope accent lights behind the valance.

Aft to port is the cabin's entrance to the guest head. To starboard is a cedar hanging locker with an auto light. The cherry vanity has one drawer and a stool below the countertop. Above is a cabinet with a 22” Vizio LED TV above. Below the sole is access to the bow thruster. Also in this cabin are five halogen mini spots, two halogen reading lights, rope accent lighting, a Clarion AM/FM/CD player, a CO detector, two stereo speakers with volume control, a central vac outlet and an opening round Bomar hatch above for ventilation or escape. The sole is carpeted.

Foredeck

• Fiberglass non-skid decks
• New 104lb. galvanized Mantus plow style anchor with150’ chain rode
• Lewmar anchor windlass with up & down foot switches
• New Mantus Bow roller & stainless steel anchor chute
• Chain locker hinged access hatch
• Freshwater anchor wash down spigot & hose
• Oversize welded stainless steel bow rails with stainless steel lifeline
• (3) Windshield wipers with washers
• Forward hailer horn
• International navigation lights
• Windshield cover – white Stamoid (new 8/25)
• Spare black Textilene windshield cover (new 8/25)
• Side deck grab rails
• Port & starboard opening side gate in bow rail with ladder inserts
• Dual spring line cleats port & starboard
• Stainless burgee staff
• Round Bomar deck hatch to VIP   
• Stainless steel vertical boarding ladder mounts port & starboard, stows in lazarette
• Dark tinted frameless cabin side windows
• Air horns
• (2) Custom stainless steel foredeck handrails
• White vinyl sun cushions with blue piping & black Stamoid cover
• Lucite drink holders at bow cushion
• ITT Jabsco searchlight
• Front windshield re-bedded (3/23)
• Salon side windows resealed (3/25)

Aft Deck

• (3) Permateek synthetic teak steps port & starboard down to swim platform (new 3/25)
• (2) Hinged stainless steel gates at platform stairs
• 4-person aft bench seat with white and tan vinyl cushions & Stamoid cover
• Teak hi-lo teak table with cover (new 4/25)
• Permateek synthetic teak sole resealed 2026
• Removable hatch to service engines (new 3/25)
• (7) Permateek synthetic teak steps to flybridge with stainless steel handrail (new 3/25)
• LED bullet lights at each step
• (2) Permateek synthetic teak steps to side deck, port & starboard with LED step lights (new 3/25)
• Port & starboard coaming doors to access stern cleats, each with (2) stainless steel fair leads
• PAR pressure regulated water inlet in portside locker
• Glendinning cable master controls in starboard side locker
• TV/telephone inlet in starboard side locker
• Hydraulic platform controls in starboard side locker
• SSI hot & cold shower enclosure to starboard
• (2) Additional stainless steel stern cleats at transom
• 750 lb. hydraulic fiberglass swim platform for tender storage
• (3) Overhead stainless steel trimmed halogen lights
• Large storage locker below hinged top sink cabinet to starboard
• Stereo speakers with separate tweeters
• Fusion stereo remote control on aft deck for FB stereo (1/25)
• Icemaker (new 4/26), installed under FB stairs
• Pop-up center line cleat at fixed transom area

Tender

• 2024 AB Mares 12’ RIB with Hypalon tubes
• 30hp Honda outboard
• Console steering
• Double bench seat with storage below
• Double seat in front of console with storage below
• Bow seat with storage below
• Bilge pony
• Electric start
• Battery shut off switch
• 7’ Garmin plotter depth
• Full cover, black Sunbrella
• Tender chocks

Flybridge Deck

• Permateek synthetic teak decks (new 3/25)
• Helm to starboard
• Unique sun lounge area with new cushions (8/25) forward of helm with complete Stamoid cover
• Tinted Venturi windscreen 
• Flybridge bar with stainless steel sink, Isotherm refrigerator (new 11/25) & Miele electric BBQ grill 
• J-Shaped flybridge seating with removable cushions & storage below
• Cocktail table - varnished
• Fiberglass radar arch
• LED low level deck lighting
• Storage locker at Helm
• (2) Skar stereo speakers (new 4/25)
• (2) Helm chairs with Stamoid covers
• Storage under helm seats
• Helm cover - Sunbrella
• Stamoid wheel cover
• Storage cabinet under bar
• Teak footrest at helm
• FRP hardtop
• (4) place rod storage overhead
• (2) speakers with tweeters overhead
• (4) stainless overhead light fixtures

Flybridge Helm Equipment

The flybridge helm features the following equipment:

• CAT color engine monitor (new 2019)
• 16" Garmin touch screen GPS/plotter model 8416 (new 6/24)
• Simrad AP20 autopilot remote head
• Raymarine ST 60 digital depth finder
• Icom 506 VHF with remote speaker
• Bennett trim tab controls
• ZF electronic engine controls with synchronizer (new 4/24)
• Vetus bow thruster controls
• ITT Jabsco searchlight controls
• (2) Wema fuel gauges
• Ritchie 5" PowerDamp Plus magnetic compass
• "Dino" wood tilt steering wheel
• Engine start/stop key switches
• 4 Station high water alarm 
• Windlass remote controls
• 12V outlet
• Fireboy engine shut down override controls
• Fusion AM/FM/CD 3 zone stereo Sirius ready with Sirius antenna (new 4/25)

Hardtop Equipment

• Glomex Terrestrial HD TV antenna on arch
• 2) VHF antennas
• Garmin 4’ open array antenna (new 6/24)
• Hailer horn
• Nav light mast
• Starlink antennae (new 2026)

Lazarette

The Lazarette and the engine room are reached via lifting up the center section of the aft deck seating. A five teak tread stainless steel locker heads to the lazarette with the engine room just forward behind a hinged door.

Lazarette equipment includes:

• Timer for waste discharge pump
• AC fluorescent lighting
• DC incandescent lighting
• Spare fenders & lines
• Four teak step stainless steel boarding/swim ladder
• Rudder gear under covered box
• GFCI outlet
• Access panels to bilge below
• Hydraulic power pack for swim platform, pump rebuilt (2/25)
• New hoses for hydraulic swim platform (2/23)
• Hynautic steering ram rebuilt (2/24)
• New rudder bearings (2/25)
• Lazarette sole repainted (10/26)

Engine Room

• Both CAT 3406 engines rebuilt Fall 2026
• (2) Racor 75/1000 HX fuel filters for each engine with vacuum gauges 
• LG 1500 Algae X magnetic fuel conditioner
• (2) ZF V-Drive transmissions (new 9/24) replaced twin disc models
• Rear main seals replaced on both engines (9/24)
• "Strong Seal" dripless shaft seals with mounted spares
• New Turbos, both engines (9/25)
• 2 ½" stainless steel shafts
• New cutlass bearings (2/25)
• (2) new after coolers on main engines (7/25)
• Dual actuator Bennett trim tabs
• New 5-blade Veem propellers (7/25)
• (2) Spare props
• 10 HP Vetus bow thruster
• Reverso 5 Point oil change system for mains & generator & transmission
• Dometic variable speed 48,000 BTU chiller (new 2019)
• Rheem 20-gallon hot water heater
• Airsep crankcase ventilation system
• Water tank electric gauge
• Waste tank electric gauge
• (2) Coolant recovery bottles for main engines
• Coolant recovery bottle for generator
• Engine driven Teleflex Sea Star power steering system
• Racor 500 fuel filter for generator
• Groco 3" main engine intake strainers with ball valves 
• AC fluorescent lighting
• Grundfos X 110V fresh water pump
• WellSaver expansion tank for water system
• Shaft brushes for bonding
• Door between engine room & lazarette with window
• 57 lb. Fireboy Halon fire controls system
• New Sea Water Pro watermaker 49 gph (new 1/26)
• New waste system discharge hoses (7/25)
• Engine room insulation behind perforated aluminum panels
• (2) 240V engine room blowers
• (3) Fiberglass mufflers
• Sanigard holding tank vent filter
• (2) 413 Gallon fuel tanks with site gauges
• Hard coat wrapped exhaust risers
• (3) Rule 3700 bilge pumps

Electrical

• 17 kW Onan Generator in sound shield, oil, filters and impellers (new 4/26)
• (2) 4D Gel Cell12V batteries for 24V engine starting, thruster & windlass
• (2) Renogy 300 all lithium 12V batteries for house service (new 1/26)
• (1) 12 volt generator start battery (1/26)
• 220V 50 amp Glendinning cable master with 75' cord in starboard cleat locker
• Charles Charger 24V 5000 series 30 amp battery charger for starting batteries
• Victron Energy MultiPlus-II 12V 3000 watt 120 amp charger/inverter 9New 1/25)
• Victron Energy OrionXs 12V 50amp charger (new 1/25)
• Victron Energy inverter remote control at main panel (new 1/25)
• Rex manufacturing 15 kVA isolation transformer
• LED DC volt meter
• LED AC volt meter
• LED DC amp meter
• LED AC amp meter
• Cable TV/telephone inlets in starboard cleat locker
• Neptunus DC panel with 42 breaker protected circuits with indicator lights
• Neptunus 110V panel with 20 breaker protected circuits with indicator lights
• Neptunus 220V panel with 8 double pole breaker protected circuits with indicator lights
• (3) centralized GFCI breakers in electrical locker
• Newmar GI-50 galvanic isolators
• Fully bonded for electrolysis protection
• (2) Battery shut off switches
• Port engine alternator is 24V 60 amp output (new 9/24)
• Starboard engine alternator is 12V 105 amp output (new 9/24)
• Centrally located GFCI outlets for ease of resetting
• Battery switch in VIP to cut off power to bow thruster
• Having the gel batteries located out of the heat the of the engine room, they typically last 5 – 6 years before replacement.

Remarks

CAY LOU is a very nice example of the 56’ Neptunus Motor Yacht line. Built in Canada she is comprised of all North American parts that are easy to service and readily available.

Having more updates and updated equipment than many other boats of her age, she is ready to go!

Her high gloss cherry interior presents very we. Three staterooms, two heads, a lower station and an open galley arrangement make her a favorite with the American market 

Fresh engine rebuilds (Fall 2026) by Smith & Wick Marine Diesel, Jupiter, FL.

Just compounded and waxed from the rub rail up, shows great.

See notes on recent upgrades… It’s turnkey and ready to cruise now! Impressive!

NOTE:

Note: Actual LOA is 58’

Listing MLS by Yachtr.com