2021 Seahorse 52 MotorSailer
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- Engine/Fuel Type:
- Single / diesel
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- Can Be Shipped Or Sailed From, China
- Hull Material:
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MANDARIN 52' LOA FULLY EQUIPPED MOTORSAILER, MODERN DESIGN. Selling direct, without advertising or promotions, means our prices are about one half those of similar motorsailers.
My company, Seahorse Marine, has been building passagemakers at our factory in Zhuhai, China, for 21 years. We mainly sell our vessels directly to the end user providing a fine product at great savings. Build time is around 12 months for the Mandarin 52, depending on suppliers, current orders and weather.
Shipped or take delivery at the factory.
The Mandarin 52 foot motorsailer (50' + a 2' swim/dive/boarding platform) is my favorite passagemaker. I seem to be building more power-only trawler yachts lately. But, personally I have never figured out why people want to rely on mechanical devices in the middle of the ocean while throwing away a wind equaling their boat speed, which they paid for - and than worrying about fuel??
The Mandarin has a full keel no-nonsense semi-displacement hull designed by Blaine Seeley. 52' LOA with a 56' mast, furling on all sails is standard and Harken winches makes sail handling a breeze.
The forward arrangements can be the traditional "V" berth or side double bunk cabin and a second double bunk cabin to port or a single queen size cabin. A head with separate shower is located to starboard. Two island queen sizstateroom are an option.
Aft of the very large main saloon, 10 by 15 feet, are the galley to port and the large workshop to starboard. A spiral staircase leads to the pilothouse with its own dinette and to the cockpit.
The aft cabin has a head with a full size tub, Jacuzzi optional, or large shower. The standard layout has a centered queen size bed and eight feet of hanging locker space. An optional den/office arrangement has the bed to starboard, a large centered desk with a panorama view through the transom and a small sofa to port.
Click "Full Specs" above for pictures and detailed information.
Click on "PASSAGEMAKERS DIRECT", below, for direct purchasing and additional motorsailer information.
I would love to build a Mandarin 52 motorsailer for you and I'm sure it would more than meet your expectations. Contact me if you have any questions or comments.
Please contact at +86 (0)756 550 1060
Additional Specs, Equipment and Information:
Builder: Seahorse Marine
Designer: Blaine Seeley
Hull Shape: Semi-Displacement
LOA: 52 ft 0 in
Beam: 15 ft 0 in
LWL: 49 ft 0 in
Maximum Draft: 5 ft 6 in
Displacement: 44000 lbs
Ballast: 7000 lbs
Total Power: 160 HP
Engine Brand: Tier III Marine Diesel
Engine Model: John Deere 4045
Engine Type: Inboard
Engine/Fuel Type: Diesel
Drive Type: Direct Drive
Engine Power: 160 HP
Cruising Speed: 8 mph
Maximum Speed: 10 mph
Fresh Water Tanks: 2 Fiberglass (100 Gallons)
Fuel Tanks: 3 Fiberglass (300 Gallons)
Holding Tanks: 2 Fiberglass (40 Gallons)
Number of single berths: 4
Number of double berths: 2
Number of cabins: 3
Number of heads: 2
Electrical Circuit: 24V
Displacement: 44000 lbs dry
John Deere 4045 Tier III, 125 HP
Cruising Speed: 7 to 9 knots
Approximately 200 HP Marine Diesel.
Flexible motor mounts with flex shaft and thrust bearing;
12KW Toroidal isolation transformer;
Fuel polishing systems installed;
Electric 24 volt windlass with with 350" 5/16" hi-test chain;
Two anchors, your choice of plow, bruce, spade or danforth types, stainless available.
130% roller furling genoa;
Mainsail with convenient and reliable furling and reefing using atwartships boom system, includes a large self tailing sheet winch;
Eight Harken winches, self tailing were appropriate (electric winches optional);
VHF Antenna, anchor light and strobe at masthead;
Deck design includes good fresh air ventilation and 8 deck
lockers, one dedicated to liferaft storage, plus cockpit insulated drinks locker;
Deck wash pump with 50' hose stored in aft deck locker
and second hose at bow for anchor wash;
Heavy duty rub rail on hull with stainless cap;
Heavy duty 24 volt engine alternator;
3000 watt 24 volt Victron charger with control panel and
460 AH, 24 volt AGM house battery bank;
Optional Flow-Scan engine fuel use meter with totalizer, LPH or GPH;
3 Pantograph windscreen wipers with fresh water wash;
Heavy duty (BA-200-9) hydraulic steering rams and pump;
Full galley with fridge/freezer, double sink and electric stove with oven. (LPG optional)
Optional deep freeze installed with 12 volt compressor;
Hot and cold shower fixture on swim platform;
Four docklines and two spring line 3/4" nylon;
Electric heads, Jabasco quite flush or Tecma;
Deck gear and hand rails all 316 quality stainless;
Stainless bimini frame for cockpit;
Deck to hull joint double bonded inside and out with UDR;
Fire resistant resin used in fuel tanks with isophalic double mat inside liner; Vinylester resin first bottom laminate and double epoxy seal for blister protection;
Quality anti-fouling paint applied;
Clear, not colored, gelcoat used in hull sides or bottom;
LPU finish, colors owner’s choice;
SELECTED OPTIONS LIST (N/C = No Charge)
$8000 24 volt Electric Bow thruster;
$10800 9KW Northern Lights Genset with sound shield;
$9800 Webasto diesel heating system, four outlets;
$3500 each unit 16,000 BTU A/C with heat option;
N/C 3000 watts, 24 volt Victron inverter/charger;
N/C 460 AH, 24 volt AGM house battery bank;
N/C High output 24 volt alternator on engines;
$1200 FloScan Cruisemaster fuel use meter with totalizer;
$1600 140 amp John Deere 24 volt high output alternator upgrade with three stage regulator;
$1080 Second high output alternator with three stage regulation for house bank;
$1200 Two 55 watt solar panels with regulator. 75 watt panels available.
$380 Watermaker, shore power or 12 volt, Wire and plumbing only (included with watermakers);
$5900 Custom watermaker, up to 200 gallons per day;
$450 Cabinet plus plumbing and wiring for owner purchased combination Washer-dryer;
$900 Sony automotive stereo with 10 disc changer and 4 high quality speakers;
$2980 Built-in freezer box, 5" insulation, with NovaCool 12 volt freezer system.
$980 LPG stove instead of electric, solenoid shutoff with twin sensor leak monitor;
$480 TV and Stereo antenna installations with dock cable inlet;
N/C Jabasco “Quite Flush” or Tecma porcelain toilets, fresh water flush.
$330 Pressure salt water faucet at each sink.
$3900 Iridium 9505 satellite telephone with external marine antenna and date link for email;
N/C Deck wash pump with 50' hose stored on aft deck and second hose bib at bow for anchor wash;
N/C Jabasco remote control spot light for security;
N/C Ships safe;
$900 Dash LCD TV with cameras aft and in engine room;
Inquire, Engine options;
Inquire, Extra sails.
Inquire, Interior layout changes and special woods or colors;
Inquire, Entertainment systems;
Inquire, Covers and canvas work
FREE ELECTRONICS PACKAGE with progress payments:
Ray Marine (8") C80 color 2KW radar, plotter, GPS, sounder, $800 up-grade to 4KW.
Icom 602 VHF with hailer and masthead VHF antenna
Icom 802 SSB with AT140 tuner and Shakespeare 23' SSB antennas
ComNav Commander (Mono display) autopilot. $4000
A second Comnav Commander (mono display) attached to a second steering cylinder for redundant power steering is $4800.
Displacement; 44,000lbs, dry, no gear.
Mast height off the water (not deck); 56' off deck; 62' from WL.
Sail area. approximately 1200 sq' main and working jib only.
Water; 350 gallons
Fuel, 600 gallons
The MANDARIN 52 MOTORSAILER shall be specified by construction drawings approved by Seahorse Marine which shall consist of no less than general arrangements and construction details including the lay-up schedule together with the standard equipment listed above.
CONSTRUCTION: Clear gelcoat to be used below the water line and the first mat layer is installed resin rich using vinylester resin for blister control. Bottom sealed with double epoxy seal. Deck and topside lay-up includes outside laminates. 3/4" balsa core for stiffness and temperature insulation and mat with double roving inside laminate.
Overlapping and interlaced double lapping at stem and keel and UDR reinforcements at chainplates and stringer caps for extra strength. Bottom solid lay-up varies from 5/8" to 1 1/4".
Quality bottom paint applied.
Hard roller used for proper resin/glass ratio and to minimize air encapsulation.
Hull to deck joint bedded in epoxy, bolted and double bonded inside and out with UDR. Interior construction to allow easy access to hull to deck joint.
Four large FRP hull stringers. UDR reinforced and built high enough to act as saddles for sole plates. All interior furniture heavily glass taped to hull for additional reinforcement.
All plywood to be WBP grade or higher.
Exterior teak brightwork limited to cockpit edge.
Caprail has stainless trim.
Heavy duty hull rub rail with polished stainless cap.
Vessel painted with LPU to purchaser's colors.
ENGINE:Cummins 220 HP 6 cylinder diesel with marine transmission. Complete engine instrumentation including high temperature, low oil pressure, and cooling water flow alarm.
Special soft engine mounts with engine mounting separate from the vessel's main stringers to insure vibration isolation.
Two inch stainless shaft connected to a thrust bearing and than to the engine through a splined universal joint drive shaft.
Sea chest with strainer and stainless ball type sea-cocks on all inlets.
Primary and secondary fuel filters.
Drip pan under engine with oil trap overflow.
Bronze underwater gear except for stainless shaft.
Four bladed propeller properly balanced and sized to selected engine.
Custom designed water cooled muffler with relieved underwater exhaust.
Quiet, large capacity engine room blower with noise isolated vents.
FRP fuel tanks well baffled and braced. Stainless steel ball valves at each end of fuel lines. Large cruise tanks double vented with 2", not 1 1/2", deck fills for easy filling.
FRP fuel tanks enclosed in 18mm plywood saddles.
Thick side and baffle construction is double lined with 1 1/2oz mat using isophalic resin. 250 gallon cruise tanks, P&S, 100 gallon operations tank in keel.
Special acoustical insulation surrounding engine room.
FlowScan fuel use meter, LPH or GPH included, with totalizer.
ELECTRICAL: Separate heavy duty engine, gen-set and house batteries connected by vapor proof master switches. Standard house batteries are four 200 AH AGM deep cycle type, 800 AH total.
Heart battery to shore power inverter, 2000 watts with three stage battery charger installed.
Back lighted custom made circuit breaker panels using high quality breakers, Three panels put electrical controls where needed. An operation panel is located in the pilothouse (described in pilothouse section of these specifications); a sub panel is located in the galley and the house panel is located in the main salon near the engine room door.
Master breakers are GFI (RCB) type for safety. Shore power and 24 volt lighting; quality lighting fixtures. Lots of indirect lighting to minimize the "workshop" lighting style found on most cruising boats.
All Seahorse Marine installed wiring is multi-strand tinned copper boat cable. Wires have color or marker codes for easy tracing. AC wiring is sized to the more demanding 110 volt requirements on boats built for 220 volt systems to maximumize resale market. Wire runs in conduit and all runs, except the bilge pumps, are located as far above the waterline as possible. All wire runs including those along the shear are easily accessible.
AC shore connector fitted to starboard side of pilothouse. AC receptacles through out, 14 total. DC sockets installed in cockpit and pilothouse.
Copper bonding strip installed the length of the keel to four zinc's at the stern. All chain plates and through hulls wired to bonding strip and keel castings.
International navigation lights and mast mounted deck lighting installed. Security flood lighting; Red interior night safety lighting and stern platform courtesy lighting installed. Pilothouse overhead lights have red and white bulbs.
Strobe, tri-color and anchor light at mast head.
Optional electronic and entertainment equipment can be planned in advance with owner so necessary wiring, grounds and cabinets can be built in.
A counterpoise reflector for SSB can be molded into the deck lay-up to the owner's designed.
VHF antenna at mast head.
WATER SYSTEM: Two water tanks, approximately 350 gallons total, with ball-cock shut off valves and vents designed to prevent salt water contamination.
Water tanks coated with epoxy certified for potable water use. A 50' hose fed by raw water pump is located in a cockpit locker and a second hose is at bow for anchor wash. Fresh water system uses copper tubing, not plastic. Fresh and raw water pumps can easily be interchanged in case of failure.
Activated carbon water filter at galley.
Stainless ball type sea-cocks on all thruhulls below the waterline.
Double all stainless clamps on all hoses below the waterline.
Hot water heater with electric and engine heat exchanger for domestic water supply.
High quality bath and galley fixtures. Shore water attachment with regulator installed.
BILGE PUMP: Three bilge pumps total, warning light and audio overrun alarm on all electric pumps, including fresh and raw water.
Two automatic electric bilge pumps, minimum 3000 gallons per hour each.
Large Titan diaphragm manual bilge pump installed.
Bilge water led to small sump fwd aft which epoxy coated to protect hull laminate.
Second electric bilge pump as high water backup.
INTERIOR: Workshop and storage cabin which can be modified during construction for an additional sleeping cabin.
Interior is teak finish with multi-coat satin glass varnish finish.
Teak cabinets, doors, wardrobes, handrails, drawers, etc. throughout.
All doors are louvered for ventilation.
All sole plates lock down.
Teak and holly floors in accommodation areas.
Galley with teak cabinets and trim, lots of counter space.
Deep foam cushions with high quality fabric coverings.
White foam Vinyl acoustical headliner and hull side liner throughout.
Hull ports are opening type with insect screens.
Lots of hand and grab rails.
NOTE: Equipment choices and hull colors to be determined in consultation with purchaser.
GALLEY: Galley sink is double with faucet including spray hose.
Electric stove w/oven with sea rails, and full size refrigerator in freezer.
Trash bin installed, sized for optional trash compactor.
Galley over 10' long and designed for easy bracing in seaway.
Lots of storage in galley, under soles and in workshop.
HEADS: Each head includes toilet, shower, basin and storage.
Aft head has full size tub.
Electric toilets with holding tank and overboard or deck drain.
Each head has port and power ventilation on timer switches.
All towel rails are to handrail strength. Mirrors are fitted in heads as well as each sleeping cabin.
HULL LIGHTING AND VENTILATION: Eleven opening hull ports with insect screens. Eight opening deck hatches.
Eight non opening windows in hull plus pilothouse windows.
Three deck prisms.
Optional dual marine air-conditioning installed, 16000 BTU's each with heat option. Natural and forced ventilation in hull for comfort when conditions dictate a closed boat.
DECK: Solid stainless pulpits and tubing hand rail (not wire) fully grounded to provide Faraday cage for lighting protection. 34" high for safety.
Stainless steel heavy duty cleats and chocks, not chrome bronze.
Handrails and cast deck gear 316 stainless.
Boarding gates port, starboard with fold down boarding ladders. Bow pulpit is walk through type with step/seat.
Heavy duty double anchor chute with bronze rollers.
Muir electric anchor windlass with 45LB anchor and 275' ACCO 5/16" hi-test (G4) chain rode.
Deck and dash switches for up and down operation.
Stern platform designed as an "open cockpit" with rails, steps to back deck and storage boxes which can be used for seats when underway. The aft gate folds down to become a boarding ladder. A great place for fun and fishing. A dinghy outboard can be easily stored in one of the aft platform storage boxes.
Five foot draft, full length keel. The Mandarin 52 is one of the world's only blue water cruising yachts which will also navigate most of the European and U.S. canal systems.
A deep sided and safe cockpit, fully scuppered with a sun and rain shade at pilothouse door.
Ten deck and stern platform storage boxes with scuppered secure covers. Two dedicated to line and sheet storage, very important on a motorsailer. One cockpit locker dedicated to life raft storage with room for grab bag, plus insulated drinks box in cockpit.
A 50' raw water hose is easily available in its on cockpit locker. This hose will reach anywhere in the vessel.
Shower fixture installed at transom, hot and cold water.
Strong Lewmar hatches in deck and pilothouse. Each cabin has an escape hatch.
Stainless steel ports in hull with strong tempered glass. Eleven total.
Teak cockpit seats using an epoxy bedding system.
Molded in non-skid pattern on deck.
Three deck prisms.
PILOTHOUSE: Pilothouse is fully scuppered with storm board companion way hatch to main saloon for extra safety.
Engine controls and steering in pilothouse.
Marine circuit breakers for all boat operations and for electronics installed in the pilothouse.
Safety monitor panel to give visual and audio indication of the status of all the systems in the vessel. Basically allows the person on watch to know everything that is happening in the boat with instant fault warnings.
Audio warnings for high bilge water, engine raw water flow, high engine room temperature, water leaks at the intake trunk area (covers engine room intakes, all water filters, fresh and raw water pumps, engine exhaust and water heater).
Visual indication of any electric pump running: audio pump overrun alarm if any pump runs over one minute (can be adjusted up to three minutes).
Audio alarms can only be defeated by a key switch.
Stainless or teak helm wheel.
Pantograph windshield wipers with fresh water wash.
Tinted side windows in pilothouse, non-tinted forward windshields.
Forward windshields are heavy 10mm safety glass and slanted pilothouse design reduces water pressure on glass and boat structure in a serious green water situation.
Navigation compass installed.
MAST AND SAILS: Standard mast includes double spreaders and double backstays with furling main, genoa, optional staysail.
There is no boom and the furling main is sheeted to an atwartship spreader bar with full beam Harken traveler mounted between the double back stays. A simple and safe proven system. Full walk around aft deck without interference from stays. (In boom furling optional)
Stainless steel rigging with high quality turnbuckles, 10MM" upper shrouds and fwd and back stays.
Reefing behind the mast main and 130% furling genoa included.
Optional staysail with staysail stay, halyard winch, halyard and furling installed.
Deck and sail handling gear to be appropriately sized for blue water cruising.
Three large Harken winches for main and genoa, 5 additional Harken winches.
Heavy duty genoa sheet turning blocks which can be used when towing warps.
(In order to incorporate improvements Seahorse Marine reserves the right to substitute features without notice.)
Bill & Stella Kimley
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