Port Owen Marine Diagnostics Boatyard

Precision Marine Diagnostics & Artisanal Vessel Refits

Dedicated boatbuilding, computerized engine fault analysis, and bespoke woodwork for small leisure yachts, coastal fishing skiffs, and workboats along the South African West Coast.

Port Owen Slipway

Direct Berg River marine access & crane haul-out

OEM Diagnostics

Electronic CAN bus & fuel injection profiling

Artisan Joinery

Bespoke teak decks & timber hull restoration

Rapid Turnaround

Minimizing commercial vessel downtime

Bespoke Marine Engineering & Crafts

Real hands-on craftsmanship meets digital precision. Every boat that docks at Port Owen receives rigorous master-level attention.

Computerized Marine Engine Diagnostics Diagnostics & Electrical

Inboard & Outboard Diagnostics

High-precision oscilloscope and OEM diagnostic scanners for Yanmar, Volvo Penta, Yamaha, Mercury, and Cummins. We diagnose injector timing, sensor calibration, and wiring faults.

  • Live CAN bus telemetry testing
  • High-pressure fuel pump profiling
  • Complete ignition & starter overhaul
Estimate Diagnostic Cost
Vessel Hull Refit and Gelcoat Restoration Structural & Composite

Hull Refits & Gelcoat Restoration

From severe saltwater osmosis stripping to multi-stage polyurethane spray fairing. We restore weathered fiberglass hulls to showroom mirror brilliance.

  • Moisture testing & osmosis barrier coats
  • Hand-laid biaxial structural reinforcements
  • UV-resistant marine gelcoat blending
View Hull Pricing
Artisanal Teak Woodwork and Joinery Timber & Teak

Bespoke Teak & Marine Joinery

Master carpenters shaping Burma teak, Iroko, and marine mahogany. We custom-lay teak cockpits, fabricate coamings, and hand-craft nautical companionway doors.

  • Traditional vacuum-bagged teak deck laying
  • Flexible marine caulk seam restoration
  • Hand-rubbed marine varnish finishes
Request Woodwork Quote
Custom Boatbuilding and Fishing Skiff Fabrication Custom Boatbuilding

Fishing Boat Builds & Alterations

Custom fabrication of sturdy coastal fishing skiffs, estuary tenders, and transom extensions. Tailored specifically for rough South Atlantic and West Coast waters.

  • High-buoyancy foam-injected hulls
  • Marine 316 stainless railing & T-tops
  • Custom gunwale rod racks & fish wells
Discuss Custom Build
Port Owen Slipway Antifouling and Running Gear Slipway Maintenance

Slipway Antifouling & Running Gear

High-pressure hull wash, mechanical scraping, multi-season copper-free or ablative antifouling coatings, propeller shaft laser alignment, and zinc sacrificial anode replacement.

  • Cutlass bearing & packing gland service
  • Bronze propeller balancing & pitch check
  • Seacock & skin fitting inspections
Check Slipway Slots
Marine Electronics, Sonar and Chartplotter Installation Electronics & NMEA

Marine Electronics & Telemetry

Clean, Mil-spec marine electrical rewiring. Installation and calibration of Garmin, Simrad, Raymarine chartplotters, CHIRP fishfinders, VHF radios, and lithium battery banks.

  • NMEA 2000 network backbone integration
  • Dual-frequency transducer hull coring
  • High-amp solar & alternator charging systems
View Electronics Packages

Real Refit Transformations

Witness the difference master shipwright fairing makes. From neglected chalky gelcoat, saltwater blistering, and frayed rigging to a seaworthy, race-ready vessel built to conquer South Africa's Atlantic coast.

Vessel Model

32ft Cape Cruiser

Refit Scope

Osmosis Stripping & Fairing

Diagnostic Results

100% Fuel Rail Balance

Turnaround Time

9 Working Days

Book Your Vessel Assessment Call +27 60 495 2678
Completed Mirror Hull Refit After: Port Owen Refit
Weathered Hull Before Refit Before: Weathered

Interactive Marine Service Estimator

Select your vessel specification to receive an instant estimate guideline for work performed at Port Owen Boatyard.

1 Select Vessel Classification
2 Primary Service Requirement
3 Vessel Length (Feet)

Estimated Workshop Range

Subject to final dockside physical inspection

Estimated Budget (ZAR)
R 3,000 – R 4,100
  • Vessel: Fishing Boat (20–35 ft)
  • Discipline: Computerized Engine Diagnostic
  • Turnaround: 24 - 48 Hours
  • Facility: Port Owen Boatyard Berth
Port Owen Marine Workshop Interior Handcrafted Shipwright Tools

Purpose-Built Boatyard at Port Owen

Situated directly on the Berg River estuary, our boatyard offers sheltered deep-water berths, crane haul-outs, and dust-controlled bays for composite fairing and fine timber joinery.

Direct Estuary Slipway Access

Safe launching and haul-out for vessels up to 45ft with draft capability along the Berg River channel.

Calibrated Diagnostic Test Benches

Bench-testing of fuel injectors, alternators, hydraulic steering helms, and electronic throttle actuators.

Full SAMSA Safety Survey Preparedness

Ensuring coastal commercial and charter skippers pass statutory seaworthiness audits with confidence.

Trusted by Local Skippers

Endorsements from commercial fishing operators and yacht owners across St Helena Bay, Saldanha, and Port Owen.

★★★★★

"We had an elusive intermittent CAN-bus error shutting down our port Yanmar diesel during offshore charters. Marine Diagnostics diagnosed the faulty sensor harness in under 3 hours and had us back on the water before the weekend rush."

CL
Capt. Leon van der Merwe

St Helena Bay Deep Sea Charters

★★★★★

"The teak deck restoration on my 36ft sloop was carried out with true artisan care. The joins, the caulk lines, and the custom companionway woodwork reflect old-school craftsmanship you rarely find anywhere else."

JS
Johan Smit

Port Owen Yacht Club Member

★★★★★

"They built a reinforced transom and custom gunwale T-top for our 21ft fishing skiff. Solid, seaworthy, and handled the turbulent West Coast swell without a rattle. Highly recommended boatyard!"

MB
Marco Bester

Velddrif Commercial Line Fisherman

Boatyard Inquiries

Common questions regarding slipway haul-outs, mobile diagnostic callouts, and engine warranties.

Our workshop maintains official OEM software protocols for Yamaha, Mercury / Mariner, Suzuki, Honda, Volvo Penta (diesel and petrol D3-D13), Yanmar, Cummins Marine, and Caterpillar. We can read live sensor telemetry, balance injectors, clear trouble codes, and program electronic control modules.
Yes. While our primary slipway and refit workshops are located at Port Owen Boatyard, our equipped mobile diagnostic unit covers St Helena Bay, Velddrif, Langebaan, Saldanha Bay, and Paternoster for urgent dockside electrical and mechanical breakdowns.
Our Port Owen slipway and travel hoist handle vessels up to 45 feet in length with maximum beam restrictions corresponding to Berg River channel tides. For larger commercial trawlers, please call us to schedule high-tide positioning.
All structural composite repairs and osmosis barrier treatments carry a comprehensive 24-month craftsmanship warranty. Mechanical overhauls carry full parts and labor guarantees in accordance with South African maritime standards.

MARINE DIAGNOSTICS AND SOLUTIONS

Reach our head shipwright and certified diagnostic team directly. We provide emergency slipway assistance and scheduled vessel consultations.

Workshop Address

1 Marina Center Port Owen Drive
Port Owen, Western Cape, 7365

Telephone (South Africa Format)

+27 60 495 2678

Official Correspondence

jadsmin@marinediagnosticsza.yachts

Operating Hours

Mon – Fri: 07:30 – 17:30
Sat: 08:00 – 13:00
24/7 Emergency Haul-Out on Standby

GPS: 32°47'12.4"S 18°09'02.1"E

Book Slipway or Diagnostic Assessment

Provide details about your vessel and issue. Our engineering team will review and confirm availability.