The boat featured is not currently for sale by Boatshed. The boat information and images presented are part of Boatshed’s back catalogue of the 20,000+ boats we have listed in the last 15 years and appear here for general information and guidance purposes about Boatshed and our boat selling systems and services
Thornycroft Sealion 40

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Boat REF#

£0 Sold / Unavailable

12.14m (39'10")



Underwater profile


2 x Diesel 145hp, Perkins HT6.354 (1968)

Costa Brava, Girona


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Extra Details

Designer Thornycroft
Builder J G Meakes Ltd
Lying Costa Brava, Girona
Fuel capacity 1,363.0 ltr (299.9 G) Total - 1 Tanks
Water capacity 454.0 ltr (99.9 G) Total - 1 Tanks


Engine 2 x Diesel 145hp
Engine make and model Perkins HT6.354 (1968)
Engine Hours Engine1: 2200 engine2: 2200
Engine Cooled Indirect
Steering Wheel
Drive Shaft
Prop(s) Single pitched
Fuel consumption (approx) 30.0 ltr (6.6 G) /hour At Cruising Speed
Cruising speed (approx) 12 knots
Max speed (approx) 17 knots

The recorded engine hours of 566h is probably incorrect but no other records are available other than recorded as 1700 hours in 1998
As well as the 24v system there are 3 12v batteries dedicated to the 240v inverter. All Batteries need replacing


LOA 12.14m (39'10")
LWL 11.50m (37'9")
Beam 3.81m (12'6")
Draft Min 1.07m (3'6")
Draft Max 1.07m (3'6")
Airdraft 2.90m (9'6")
Displacement 16,250kg (35,831.3lbs)
Headroom 1.85m (6'1")
Storage On marina

Electrical Systems

24 volt, 4 batteries charged by: engine, shore power


Construction GRP
Underwater profile Semi-displacement
Finish Paint finish

Holding tank can easily be added


Total # of berths 4
No. of double berths 1
No. of single berths 2
Cabin(s) 2
Handbasin 2
Shower 2
Heads 2 heads (Electric)
Cooker tick
Grill tick
Oven tick
Sink tick
Fridge tick
Freezer tick
Curtains tick
Cabin heating tick
Pressurised water system tick
Hot water system tick
Fresh water wash tick
Cockpit shower tick
Microwave tick
Washing Machine tick

She has a full central heating system throughout.
Saloon has been converted to comfortable live aboard seating.

2 burner gas cooker

Nav Equipment

Compass tick
Speed tick
Log tick
VHF tick
GPS tick
Chart plotter tick
Stereo tick
Clock tick
Barometer tick
Navigation lights tick
Echo sounder tick

Deck Gear

Warps tick
Fenders tick
Boathook tick
Davits tick
Swim Platform tick
Swim Ladder tick
Passerelle tick

Electric Simpson Lawrence windlass
2 anchors
50.00m (164'1") of chain
Avon dinghy (unknown year)

Safety Equipment

LPG Detector tick
Life jackets tick
Searchlight tick
Horn tick

2 bilge pumps (0 manual / 2 Electric)

As well as the 2 electric bilge pumps, there is a mechanical pump system that can be diverted to any sealed bulkhead (see photos)

Broker's Comments

Sold to the current owner by Boatshed Costa Brava in 2011. Has been a comfortable live aboard for the current and previous owners and now in need of some restoration to bring her back to her former glory. Huge foredeck for enjoying the sun and a spacious open flybridge / raised cockpit providing a second helm and seating. Obviously needs a new cover! below there is a good sized at owners cabin with en-suite shower and WC. A saloon on the main level with the main helm (original seating has been removed to accommodate a simpler live aboard). The galley is situated on the lower level and leads to the day heads and the forward cabin. British Registered. This boat is offered at the current price for sale on an unconditional, as is, basis only.
These boat details are subject to contract.
Note: Offers on the asking price may be considered.

This Thornycroft Sealion 40 has been personally photographed and viewed by Paul Griffiths of Boatshed Costa Brava. Click here for contact details.
The particulars herein are intended to give a fair description of the vessel but are not guaranteed as accurate. They shall not form part of any offer or contract for the sale of the vessel. The prospective purchaser is recommended to independently check the particulars. The vendor is not selling in the course of a business unless otherwise stated. Personal property is excluded from the sale of the vessel unless specifically included in the listing specifications above or in a Purchase Contract. Personal property may be equipment or gear not permanently attached to the vessel including but not limited to: artwork, entertainment equipment, fishing equipment, TV receivers, recreational equipment, kayaks, tools, and personal appliances. Photos that may incidentally depict owners' personal property do not convey that such items are included in the sale of the vessel unless specifically listed herein.

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