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1978 Kok 1285 Motorgrundel

Burnham-on-Crouch, United Kingdom


Musia is a charming example of this popular size and style of Dutch steel motorcruiser constructed to an excellent standard by a highly regarded yard. Although ideal for exploring rivers and waterways, she was also built with a more seagoing underwater profile than usual and internal helm position for her first owner to cruise long distances and explore the Mediterranean. Her layout has also been updated to offer more comfortable liveaboard accommodation for two, with a comfortable owners cabin aft, upgraded, deeper seating, large galley and utility area forward and generous amounts of storage space. 

Viewing by prior appointment only through our Essex office on (01621) 785600.

Basic Boat Info

Price: £64,500
Boat Name: Musia
Make: Kok
Model: 1285 Motorgrundel
Year: 1978
Condition: Used
Category: Power
Builder: KOK/Achterbos of Vinkeveen
Designer: T.J Kok
Construction: Steel


Length: 42 ft
Length Overall: 42'1 ft
Beam: 12'7 ft
Max Draft: 3'7 ft
Min Draft: 3'7 ft
Displacement: 12,000 kg
Bridge Clearance: 7'7 ft

Engines / Speed

Engines: 1
  • Make: Thornycroft
  • Rope Cutter: true
  • Model: 345
  • Drive Type: Direct
  • Fuel: Diesel
  • Engine Power: 113hp
  • Type: Inboard
  • Propeller Type: 3 Blade, Bronze
  • Year: 1980
  • Engine Hours: 5860
Cruising Speed: 7 kn
Maximum Speed: 10 kn


Fuel Tanks: 1
Fuel Tank Capacity: 500 L
Water Tanks: 1
Water Tank Capacity: 500 L
Holding Tank Count: 1
Holding Tank Capacity: 20 L

'Musia' is fitted out in a traditional style to a high standard and her flexible layout offers up to six comfortable berths combined with superb space and storage for liveaboard cruising.

FORWARD LIVING AREA - This space features a well proportioned dinette to port which converts to form a double berth, U-shaped utility area with washing machine, oven, microwave and fridge leading on to a very large linear galley equipped with generous work surfaces, a 4-burner electric ceramic hob, stainless steel sink and ample stowage space. All equipment can be powered by shorepower or generator to allow cooking whilst passage making without the safety concerns of gas. Steps lead up to wheelhouse saloon.

WHEELHOUSE SALOON - The raised saloon has excellent natural light and ventilation creating a very comfortable area to relax or entertain in. Settees to port and starboard with storage beneath and offering two comfortable single berths. Free standing table with built in storage beneath. Internal helm position forward to port with freestanding removable helmsman chair (bolts down in adverse conditions to starboard), instrumentation and navigation equipment. Boatman multi fuel stove forward to starboard. Sliding doors to port and starboard decks and steps down to forward living area and aft cabin.

HEADS COMPARTMENT: Heads compartment to port with Jabsco marine toilet, Y-Valve to removable cassette tank for easy waste disposal (a holding tank could easily be installed if desired) or overboard discharge, shower and washbasin.

OWNERS AFT CABIN: The full width cabin consists of a double berth to port with large storage hold beneath, excellent storage in numerous lockers, drawers, shelves and wardrobe with a dressing table and vanity unit with sink to starboard. Also fitted with an LCD tv and an electric radiator for convenient heating whilst on shore power. 

GENERAL EQUIPMENT: Webasto ST5000 diesel fired warm air heating system with outlets to all cabins. Boatman 5kw multi fuel stove with removable chimney. Hot and cold pressurised water system via calorifier with immersion coil. Removable dehumidifier. 400 litre fresh water tank with 100 litre reserve. Fly nets for doors, port holes and hatches. Entertainment provided by a LCD TV with satellite feed and JVC CD/radio stereo system. Concealed boat safe for valuables. High quality interior cabinetry with blue cotton upholstery (new 2014) and complimenting curtains throughout. 

EXTERNAL SPACE: The raised aft cockpit has a simple helm position off centre to port and a large open aft deck with removable bimini top offering excellent space for alfresco dining and entertaining. Wide side decks with good steps, high guard rails with side gates and excellent safe level surfaces make deck work safe and easily manageable. Aft deck crane and davits also fitted for easy handling of a tender and heavy equipment. Deck mounted boat hook storage and aft bathing platform with folding swim ladder.

Mechanical Systems

Located under the wheelhouse sole, Thornycroft 6-cylinder 113hp diesel engine. Freshwater cooled via heat exchanger to keel cooling unit for simplicity and increased reliability. Single lever controls and hydraulic wheel steering at both helms. 400 litre fuel tank with a 100 litre reserve tank. Fuel consumption is approximately 6 litres per hour at 7 knots, with a maximum speed of 10 knots. Shaft drive via Hurth hydraulic gearbox to 3-bladed bronze propeller with rope cutter. Hydraulic bow thruster with controls at both helms. 

The engine is in good cosmetic condition, has been regularly maintained and proven very reliable during current ownership, having recently completed the return trip from Belgium to the UK East coast. It was last serviced in March 2018 and the hour meter is showing 5860hrs since new. A comprehensive spares package including boat toolkit is included with the sale.

Spars and Sails
  • Twin tabernacle mounted masts with stay sails (in as new condition)
Electrical Systems

5 x 12v batteries (2 x domestic, 2 x engine in 24v bank and dedicated generator) charged via 12v and 24v engine alternators. Shore power system with ring mains, immersion coil and battery charger. Mitsubishi 3-cylinder 7KVA fresh water keel cooled diesel generator with remote start. Vetus 1.2 Kw inverter. Solar panel (140w) with charge regulator. Electrical distribution panel at helm. 

Deck Equipment
  • Danforth anchor with chain and warp
  • Manual anchor winch
  • Stainless steel aft deck crane and davits
  • Canvas sun canopy and separate deck awning
  • Bathing platform with stainless steel swim ladder
  • Aluminum passerelle 
  • Aft deck table and chair set
  • All round handrails with gates, aft ladder and coachroof grab rails
  • 3 x Windscreen wipers
  • Aft and forward masts with deck light (can be lowered)
  • Stainless steel deck fittings
  • Mooring pins with hammer
  • Assorted warps and fenders
  • 25 metre lock ropes
Navigation Equipment
  • Steering compass
  • Handheld compass
  • Northstar DSC VHF radio
  • Digipak combined depth, boat speed/log and wind speed
  • Seafarer echo sounder
  • Laptop with pre-loaded C-Map chart plotting software
  • Garmin 152 GPS navigation system
  • AIS receiver
  • Raymarine hydraulic auto pilot with S100 wireless remote control
  • Navtex Weather system
  • LCD TV with satellite dish and tuner
  • JVC CD/radio stereo system
  • Brass clock and barometer
  • Navigation lights
Safety Equipment
  • 5 x Fire extinguishers (may require servicing)
  • Fire blanket
  • 4 x Smoke alarms
  • 4 x Lifebuoys
  • Radar reflector
  • Fog horn
  • Manual and electric bilge pumps

Kok 1250 Motorgrundel designed by Th.J.Kok and built in 1978 by Kok/Achterbos of Vinkeveen in the Netherlands, first commissioned 1980. Dark blue painted steel displacement hull with long keel profile (protecting rudder and propeller, also fitted with weed box), cream superstructure and grey decks with non-slip profile. Dual station hydraulic wheel steering. Minimum air draft 2.31m (7'6") with the masts and screen folded down.

In 2009 the hull was shot blasted below the waterline back to bare metal and then coated with epoxy, at this time hull thickness was stated as being almost as new. 

Owners Comments

After searching for some time for the right boat, we found 'Musia' in Northern Holland. Originally designed and built by the highly regarded Kok yard, her first owner commissioned her for cruising European waterways and the Mediterranean so we felt she was well suited to our intended coastal and inland waterway cruising. We are her third owners, the couple we bought her from were Dutch and had owned her for fifteen years, travelling for for 6 months each season. They told us they had visited the Baltic, Germany, Poland, then through the Black Sea and down onto the Mediterranean, before returning back through France and Belgium to Northern Holland. According to them, they found no bridge was too low or waterway she had too much draft for. When we took ownership they were 75 years old and had enjoyed every moment. They didn't really want to give her up but had decided that at 75 enough was enough. We felt that they only sold her to us as we wanted to continue as they had; otherwise we are not sure they would have let us have her! We brought her back through the canal system to  Roompot Sluis and across the North Sea to the River Orwell on the East coast of England. We spent the next couple of years cruising the East coast whilst making her more comfortable and updating her. 

Up until her return trip to the UK this year we had used her for 6 months in the summer combined with a few two week stays in the winter, mainly using her as a base to travel around from. We arrive and light the solid fuel stove and away we go, warm as toast! In the summer we have traveled through Belgium, Holland, and Northern France, seeing some amazing sights and places en route. We were looking for a cruiser that we could go anywhere in and it appears that if you are under 15 meters long and a draft of up to 1.2m and air draft of not more than 2.5m it fits the bill.

We have crossed the North sea five times in her and have been very happy with everything we have done. She has nice wide decks for ease of use, stay sails to make her steadier at sea but the tabernacle mounted masts easily fold down within the length of her coach roof, so are never in the way during canal or river cruising. She is always level with jetties when we pull up so you can just step off without steps, ideal for someone with mobility issues or maybe a large dog! We have also stopped on quays and have just climbed off the back deck being level with the quay so you have two easy access heights for different locations. When she goes we will feel the same as her previous owners, she has always looked after us well and will be leaving her fully equipped ready to go, just add food and clothes.

Boat Insurance

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The company normally acts as brokers for the vendor who unless otherwise stated is not selling in the course of a business. Whilst every care has been taken in the preparation of these particulars the correctness is not guaranteed and they are intended as a guide only and do not constitute a part of any contract. A prospective buyer is strongly advised to check these particulars and where appropriate and at his own expense to employ a qualified marine surveyor to carry out a survey and/or to have an engine trial conducted which if conducted by us shall not imply any liability on our part.

General note on safety equipment: Any safety equipment such as liferaft, fire extinguishers and flares etc., are usually personal to the current owner(s) and if being left on board as part of the sale of a used vessel, may require routine servicing, replacement, or changing to meet a new owner’s specific needs.

Disclaimer This calculator is intended solely for general informational purposes, and to provide a rough estimate based on the information you provide. You should not base your decision on this estimate alone.