1976 Marine Management 48

$79,250

Used

Boat in Newburyport, MA 01950 US

builtBuilt in 1976
Year the boat was built
model

48

Boat model
engine

2 Engines (Detroit, Detroit)

Engine type and count
length

48 feet

Overall boat length
fuel

Diesel

Fuel type
material

Fiberglass/Reinforced

Hull material
Length Overall
48ft
Beam
15.08ft
Max Draft
3.92ft
Dry Weight
38000lb
Cruising Speed
14kn
Max Speed
22kn
Range
700nmi
Cabins
2
Heads
2
Fresh Water Tanks
300gal
Fuel Tanks
900gal
Holding Tanks
100gal
Hull Material
fiberglass
Engine 1
Engine Make
Detroit
Engine Model
8V-71 N
Total Power
325hp
Engine Hours
2500
Fuel Type
diesel
Engine Year
1976
Drive Type
direct
Engine 2
Engine Make
Detroit
Engine Model
8V-71 N
Total Power
325hp
Engine Hours
2500
Fuel Type
diesel
Engine Year
1976
Drive Type
direct
Summary
This 1976 Marine Management 48 is a true DIAMOND in the ROUGH with an INCREDIBLE HISTORY AND VALUE looking for a new owner to realize her potential.
Information & Features

1976 Detroit Diesel 8V-71 N (Engine 1)


Type:                   Inboard

 

Fuel Type:           Diesel

Hours:                  2500


Drive Type:          Direct Drive

 

Power:                 325 hp

Propeller Type:    4 Blade


Propeller Material:


Bronze


 

1976 Detroit Diesel 8V-71 N (Engine 2)


Type:                   Inboard

 

Fuel Type:           Diesel

Hours:                  2500


Drive Type:          Direct Drive

 

Power:                 325 hp

Propeller Type:    4 Blade


Propeller Material:


Bronze


Dimensions

LOA:                    48 ft

Beam:                  15 ft 1 in

Max Draft:            3 ft 11 in

 

Weights

Dry Weight:          38,000 lb

 

Speed

Cruising Speed:   14 kn

Max Speed:         22 kn

Range:                 700 nmi

 

Tanks

Fuel:                    2 x 450 gal Aluminum Fresh Water:    2 x 150 gal Plastic Holding:           2 x 50 gal Plastic

 


Accommodations

Single Berths:      2

Twin Berths:         2

Cabins:                2


Heads:                 2


 

Electrical Equipment

- Shore Power Inlet

- Generator

- Inverter

 


Electronics

- Depthsounder

- Radar

- TV Set

- Navigation Center

- Plotter

- Autopilot

- Radio



- Compass

- GPS

- VHF


 


Inside Equipment

- Washing Machine

- Electric Bilge Pump

- Manual Bilge Pump

- Microwave Oven

- Marine Head

- Air Conditioning

- Electric Head



- Heating

- Hot Water

- Refrigerator

- Deep Freezer

- Battery Charger


Outside Equipment/Extras

- Gangway

- Cockpit Cushions

- Cockpit Table

- Swimming Ladder

Accomodations

Sleeps 4 owners and guests in two staterooms with two heads and two showers. The Master Stateroom sleeps two and is aft with a queen berth, head, and separate stall shower. There is one Guest Stateroom forward with two berths, head, and separate shower stall.

Wynward was the personal yacht of the late Jim Wynne; he lived aboard for eight years and did extensive cruising in the Bahamas and the Florida Keys aboard her.

Some of Jim's accomplishments and designs are the invention and granting of a patent for the inboard/outboard stern drive which he sold to Volvo Penta, the Hatteras 32', Hatteras 36', and the complete Cruisers Inc. line -up to 1991, the complete Pheonix line -up to 1991, as well as models for Albin, Carver, Chris Craft, Cigarette, Donzi, Magnum, Queen Long, Trojan, and many other well-known boats. Jim also originated the "propeller pocket" or tunnel and he used that design onboard WYNWARD.

WYNWARD combines the qualities of both a planing hull and a displacement hull. Wynward will cruise economically @ 9kts consuming 8 gallons per hour or she will cruise up to 17 knots for those times when speed is important.

WYNWARD has many unique design features including 36 patents applied for at the time of build. There is one ladder from the stern cockpit down to the swim platform, all areas are accessed by stairs. The machinery space is located all the way aft under the cockpit with very short shafts turning propellers in tunnels eliminating vibration; this machinery space is separated from the rest of the living area by an insulated full bulkhead. The swim platform is actually part of the Hull increasing the waterline length and inhibiting exhaust mist from being pulled back into the cockpit from her under-transom exhaust. The hardtop flybridge (Portuguese Bridge) area is accessed by the steps, either port or starboard - the full walk-around bridge deck gives an added sense of security as well as easy access to the foredeck.

Below decks, the Guest Stateroom is forward and has two large comfortable berths, ample lockers, shelves, and hanging locker space with en-suite head and separate shower stall. Amidships is the full beam Main Salon with the option to have an L-shaped settee or table and chairs, to port is the Full Galley with ample storage, ice maker, full-size fridge with freezer, microwave, and coffee maker. Aft of the salon, down two steps, is the full-beam Master Suite.

This stateroom has a queen-sized berth on centerline with six oversized drawers underneath, and double hanging lockers. There is a lady's dressing table to port with eight drawers and an additional mirrored area forward with two drawers. The En-suite head is to starboard with a full stall shower. The current owner has done many customs upgrades and has left some of the boat undone so the next owner can customize it to their liking.

Engine & Mechanical

Twin GM Detroit Diesel 8V-71 N - 325 Hp - they were overhauled in 2005. 1000 Hours (smoh)

Mechanical Upgrades -


Rebuilt Main Engines including New Camshafts, cylinder kits, pistons, rings, bearings, valve covers, and rebuilt injectors

New Delta-T System, engine room ventilation system New Mufflers

Both A/C compressors replaces and air handlers cleaned ( 2017)

  •  Bridge Controls
  •  Hynautic Hydraulic Steering
  •  Electric heads with Y-valve for discharge to holding tank or overboard  Acoustical and thermal insulation
  •  3 Automatic bilge pumps  Freshwater cooling
  •  Racor Fuel Filters
  •  Allison 2:1 transmission ratio  Raw Water sea strainers
  •  Morse Controls
  •  Automatic CO2 fire extinguisher in Engine Room  New 2021 - 4 x 8D batteries with parallel switch  Shore power Cable
  •  12 Volt DC; 110 Volt AC
  •  New 2016 - 12 V - Battery Charger
  •  Phasor 7kw - 2017 (smoh) 1000 hours.
  •  Rewired or repaired the bonding system throughout the entire vessel, added isolation transformer and galvanic idolator.
  •  New Fuel lines were installed in 2021 and both fuel tanks "polished" using a filter and air blasting method.

Electronics

NEW 2015 -

Raymarine T70030 c125 Network Multifunction Display with USA Coastal Charts Raymarine T70031 c127 Network Multifunction/Sonar Display with USA Coastal Charts Navionics Chart - CF906p + US Southeast & Bahamas - Platinum

Raystar 130 GPS Receiver

Raymarine E92143 RD424HD 4KW 24" Digital Radome

A80173 (B164) High Performance Transducer, Multi-element 20 Degree, 200/50kHz Depth/Temp

Raymarine T70157 EV-200 Hydraulic Pilot consisting of Control Head, Sensor Core, Hydraulic Pump, Evolution Cable Kit

E43037 Ray 55E VHF Radio

- All the wiring has been cleaned up and New LED lighting has been installed throughout.

 

Deck
  • Danforth Anchor
  • Bow pulpit with rails
  • Side Stanchions with life lines
  • Ideal electric 12 Volt windless
  • H/C hand shower in cockpit
  • Fenders and Lines
  • Swim Plateform
  • Swim Ladder
  • Life Ring
  • Navigation Lights
  • Flybridge Hardtop with windshield and side windows
  • Air Horn
  • 50' x 5/16th chain and 300' x 1/2" three strand rode
Additional

WYNWARD was built in Medley, Florida by Marina Management and then taken to Dania where she was finished by well-known shipwright Howard Abbey.

Wynward was built to cruise the shallow waters of south Florida and the Bahamas. She has a shallow draft of less than 4 feet with her keel being the lowest point. Her design has a full keel with propeller pockets offering excellent protection for the running gear in shallow water as well as providing very good longitudinal tracking underway.

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.

Price History

DateEventPrice
9/12/25Price decreased$79,250(-0.3%)
2/6/24Initial price$79,500

Contact Merri-Mar Yacht Basin

364 Merrimac Street, Newburyport, MA, 01950

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Address

364 Merrimac Street
Newburyport, MA 01950
Other Information about Merri-Mar Yacht Basin

Family-owned and operated for 68 years, Merri-Mar Yacht Basin is a full-service, year-round marina, located on the Merrimack River in historic Newburyport MA. We offer seasonal and transient moorings & dockage, free WIFI & parking, storage, a Service Department, a Parts Department, a Ship's Store, and a Yacht Brokerage for pre-owned power & sail vessels.

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