1973 Custom Horstman Tri Star 38 Trimaran

1973 Custom Horstman Tri Star 38 Trimaran


Presented By

Jason Hite

+52 315 100 9174


Our Location

San Diego
1450 Harbor Island Dr. Suite 203
San Diego, CA, US


See the Other details section below for more info. Seller is willing to deliver worldwide, boat is ready to launch.

Ed Horstman designs started in 1960 with the TRI-STAR 40. In 1966, it was the first trimaran to race in the Transpac and took second place! The TRI-STAR 38's fine sailing features are complemented with high under wing clearance and full bouncy amas that are spaced to reduce wave interplay. The TRI-STAR's flush deck unitized construction gives strength and maximum interior accommodations and the safety of an uncluttered deck for lounging and easy sail handling area for the most inexperienced of sailors. True windward performance is achieved with raisable high aspect ratio dagger boards in each ama. Horstman trimarans are usually home built, but this one was built by a seasoned shipwright in Seattle.



Technical Specifications

LOA 39’

Beam 23’

Draft 3.5’, beachable with reinforced keel and retracting daggerboards

6’3” headroom throughout vessel


Sleeps 6 in three areas. Port and Starboard double wing berths with privacy curtains and aft cabin V-berth

Main hull

bow-to-stern: anchor locker, head with sink, on-demand hot water shower, nav station, wing deck storage both sides, full height closet with many shelves for crew, salon with fold-down table and window to the water, galley, engine room below cockpit, aft cabin

Port Ama

bow-to-stern: dinghy and running rigging locker, waterproof bulkhead, standing height workshop with tools, supplies and spares, quarter locker with water hoses, electrical cords and emergency Whale manual bilge pump

Starboard Ama

bow-to-stern: sail and additional anchor tackle locker, waterproof bulkhead, standing height flexible storage space with bins full of fishing gear, sanding and painting supplies, sailmaker and canvas makers tools and supplies, engine and driveline servicing tools and supplies, quarter locker with water jugs, fenders, dock lines and chafe gear, four PFDs

Design Notes
  • Scooped bows allow easy tacking, excellent watchkeeping, make docking easier, and funnels a breeze down the hatches.

  • Three large Lewmar Ocean Series deck hatches provide excellent ventilation

  • Full beam solid decks and minimal nets make for the safest deck working area, allowing sail handling and boat projects to be done on deck, and transfer all rig and wave loads through the entire structure rather than just through crossbeams

  • All transitions from one area to another are one step. One step from galley to cockpit. One step from cockpit to outer cockpits and one step from outers to deck.

  • High bridge deck clearance minimize wave pounding and sneezing.

  • Batteries are located high in the cockpit seating, keeping them out of the bilge and engine room. Maintaining power if the hull ever floods.

  • The moulded swimstep and handles in the transom make getting in and out of the water easy.

  • Built to be self-serviceable and self-reliant, everything is accessible and serviceable.

  • Built by a seasoned shipwright in Seattle, Robert Braggins built three of these Horstman trimarans. This hull was his personal yacht for 15 years.

  • Genoa: Ullman sails 135% Endurance UV stable Dacron and DuPont UV thread, offshore cruising spec, triple stitched, foam luff with reef marks, 2020, on Facnor 180 furling system.

  • Jib: 100%, dacron, refurbished by Quantum Sails San Diego 2020

  • Mainsail: Lee Sails Challenge Fastnet 9.88oz UV stable sailcloth and DuPont UV thread. Hollow cut, triple stitched, batten-less, loose footed (rain catching) with Rutgerson headcar and up-and-over leech lines. Adjustable lazy jacks. 2020. Spare main sail.

  • Storm Trysail: wire luff with pennants, require no stays or tracks

  • Spinnakers: Two full size symmetrical spinnakers, 0.75oz and with socks.

  • 2003 Isuzu C240 40hp mechanical diesel, oil/filter change every 250 hours

  • Borg-Warner velvet drive transmission

  • PSS Dripless shaft seal, inspected by La Cruz shipyard in 2023

  • 14x18x1 LH feathering MaxProp

  • 70 gallons diesel in two tanks

  • 55 gallons fresh water

  • Pilothouse roof is plumbed for rain catchment direct to tank.

  • Paloma on-demand propane hot water heater with sniffer for shower

  • 10 gallon black water

  • 3 x 20lb propane tanks in cockpit locker with Xintex control and fume detection system.

  • Full B&G SailSteer NMEA 2000 sailing system with Bluetooth remote control, wireless network and remote control autopilot. Can be controlled by smartphone or iPad. Multiple autopilot modes including SailSteer, ZeroDrift and waypoint.

  • Zeus3 chart plotter, NAC2 autopilot control and Simrad reversible autopilot hydraulic pump.

  • Remote B&G display screen in salon and remote VHF control at nav station.

  • Navionics Platinum+ Satellite chart card

  • Starlink satellite internet system

  • Standard Horizon commercial grade Quantum GX6000 DSC VHF with GPS, AIS, MMSI, WP, Hailer, PA, fog horn, and MOB functions. NMEA 2000. Remote RAM mic at nav station.

  • Standard Horizon HX890 floating handheld VHF with DSC, GPS and MMSI

  • Emtraks Class B AIS auto-switching transceiver with Bluetooth remote control, wifi networking, silent mode and nav chart overlay for B&G and iPad.

  • Icom IC-M700 Pro SSB, AT130 Tuner. Communicating with French Polynesia fleet and vessels off the coast of Africa in spring 2023.

  • Furuno GPS standalone receiver

  • All lights are LED. Dual red/white lights in cockpit, galley, salon and deck flood dimmable duals. Anchor light is Cruising Solution’s automatic dusk-to-dawn LED. Separate motoring and sailing navigation light controls

  • Foredeck and aft deck floodlights. Aft deck floods are dual red/white and dimmable.

  • TV in salon mounted on swinging hinge.

  • Boss Marine stereo system with pilothouse and salon zone controls.

  • Xantrex Magnum 3000W commercial grade pure sine wave inverter/charger with remote control and amp-hour meter. 120V/30A to 12V

  • Renogy 500 watts solar (4x125w)

  • Rutland 913i wind generator, rebuilt 2021

  • Marsrock hybrid solar/wind programmable controller

  • 4 @ 6V 190 AH AGM batteries (12VDC)

  • 1 @ 12V 800 CCA starting battery

  • Isolator and cross-link switches

  • Xantrex digital eco-charge monitor

  • Completely stocked and well supplied galley. Kirkland copper-bottom stainless steel cookware.

  • Force 10 four-burner stove with oven and pot holders

  • Norcool 12V fridge/freezer

  • Saltwater foot pump at galley sink

Anchor Tackle
  • Lofrans Tigres 1300W windlass with foot controls and manual handle. New Gypsy in 2021.

  • Bower: 73lb Rocna connected by a proper swivel and 275’,5/16G43 full chain rode.

  • Stern: 55lb Rocna to 50’5/16chain and 100’ rope line in milk crate

  • 55lb Fortress Danforth in aft cabin

  • 4 @ 300’ x 3/4” shore lines, spliced hard eyes in one end

  • Mooring bridle with chain hook

  • 2 @ 18’ x 1.5” heavy mooring tackle with swivels and spliced hard eyes in one end

  • Saltwater washdown.

Additional Equipment
  • 10’ Avon Hypalon dinghy. Two seats and multiple sets of oars, pump, well-stocked patch kit but NO patches on dinghy. Holds air excellent. Safety kit.

  • 2020 Suzuki 2.3hp four stroke. Flushed regularly and maintained by the book. Excellent condition. Flush kit and oil change kit on board.

  • Inflatable kayak with oars and pump

  • Emergency Katadyn Pur35 Survival watermaker with service kit and cleaning/pickling chemicals

  • SOS Marine MOB rescue sling and emergency boarding ladder

  • EPIRB: ACR 406Mhz with GPS, tested 2023

  • Two Bushnell binoculars, 16x50 & 10x50

  • Multiple shore power conversion adapters

  • 2 @ 30amp shower power cords

  • 4 oversized Panama Canal fenders

  • MastMate custom fit webbed mast climbing stairs, climbing tackle and two bosuns chairs

  • Brand new, never installed Alado A2 twin-sail furling system, replacement stay and Hayn swageless hardware fittings to replace any stay

  • Cruising spares including starter, alternator, freshwater pump, B&G compass, rebuild kits, engine overhaul gasket and injector kit, racor filters, etc.

  • Magna stainless steel BBQ

  • Isolated bilges keep engine oil and saltwater out of the main bilge.

  • Two fishing rods, large net, gaff hook and fishing tackle

  • Snorkeling masks, flippers and bottom cleaning supplies

  • Removeable Jack lines with harnesses and tether

  • Spare diesel and gas containers

  • Four binders covering all manuals, systems, hardware, schematics and some of the original blueprints and build photos

Transferable end-tie in prime location at La Cruz Marina New in 2023
  • SeaHawk Sharkskin hard anti-fouling

  • PropSpeed re-applied to shaft and prop

  • New zincs (always changed twice yearly)

  • New longitudinal hull-to-bridge deck bolstering andreinforcement on both sides on main hull

  • Hayn Hi-Mod swageless standing rigging with insulated backstay

  • Lewmar EVO Ocean series self-tailing deck winches

  • Kiwigrip non-skid decks

  • Davis masthead wind indicator

  • Tri-Color directional masthead navigation LED bulb, 5 mile

  • Standard Horizon VHF RAM remote mic

  • B&G remote readout display in salon

  • Sunbrella and Phifertex shade covers for the pilothouse.

  • One new propane tank

  • Fresh water sink faucet

  • Pilothouse stereo speakers


Basic Information

Manufacturer: Custom
Model: Horstman Tri Star 38 Trimaran
Year: 1973
Category: Sail
Condition: Used
Location: La Cruz, , MX
Available for sale in U.S. waters?: Yes
Vessel Name:
Boat Type: Trimaran
Hull Material: Composite
Hull Type: -
Hull Color: -
Flag of Registry: -

Dimensions and Weight

Length: 38 ft
LOA: 38 ft
Beam: 23 ft
Dry Weight:
Bridge Clearance:


Make: Isuzu
Model: C30
Engine(s): 1
Cruise Speed:
Engine Type: Inboard
Drive Type: Direct
Fuel Type: diesel
Horsepower: 40 hp
Max Speed:

Tank Capacities

Fuel Tank: 70 Gal()
Fresh Water Tank: 55 Gal()
Holding Tank: 10 Gal()


Total Cabins: 3
Berths Count:
Total Sleeps:
Total Heads: 1
Captains Count: No
Crew Cabins: -
Crew Berths: -
Crew Sleeps: -
Crew Heads: -


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.