Service • Repairs • Rebuilds • Repowers • 24/7 callout
Marine engineers who know boats inside and out.
When something on your boat needs an engineer, ours have probably already seen it.
Shaw Diesels has been keeping commercial vessels and pleasurecraft running for over thirty years. Our marine team specialises in marine diesel engines, marine generators, gearboxes and steering systems – from 5 horsepower right through to 5,000.
We service every major marine engine brand. We’re an authorised dealer for Isuzu Marine, Lister Petter and Gardner, plus Vortum and Zenith Engineering marine generators and Dong-I gearboxes and steering. We also still service marine DEUTZ engines for owners of older vessels – even though DEUTZ no longer manufactures new marine engines.
Auckland marina, Christchurch, on the water, in the yard – anywhere in New Zealand and the Pacific.
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A specialist field where experience counts.
Marine engines aren’t the same as engines on land. Lives and vessels can be put at risk by overlooking details that wouldn’t be a worry ashore.
- Marine engine servicing – manufacturer-spec maintenance for engines of every age and make, with a detailed checklist provided after every visit
- Repairs and diagnostics – fault-finding, component replacement and performance tuning for engines, gearboxes and electrical systems
- Engine rebuilds – top-end and full rebuilds, in our workshops or on your vessel
- Engine repowers – replacing tired engines with fresh power, including custom mounting, installation and commissioning
- New build installations – fuel, exhaust, ventilation, gearbox alignment, controls, instrumentation and sea trials
- Marine generators – sales, installation and servicing of Vortum and Zenith Isuzu-powered marine gensets
- Gearboxes and steering – Dong-I marine transmissions, hydraulic clutch systems and hydraulic steering
- Genuine parts – marine spares stocked in NZ, plus access to manufacturer supply networks worldwide
Talk to a marine engineer
Marine brands we sell and service.
Authorised dealer for the world’s leading marine diesel engine, generator, gearbox and steering brands – plus full service capability for every other make of marine engine.
Isuzu Marine
New Zealand dealer for the full Isuzu marine diesel range – from the UM4JB1 through to the 12M140, including common rail variants. Sales, parts and service.
Lister Petter
Marine diesel engines trusted in working and pleasure craft around the world for decades. Full parts inventory and on-water service capability.
Gardner
A classic engine still working hard in fishing fleets and pleasurecraft. We stock a full range of spare parts and our engineers can keep your Gardner engine running for decades to come.
Vortum
Super-silenced marine generators from 7.5 to 18.5 kVA. Just 57 dB at seven metres under full load – quieter than a normal conversation. Built around genuine Isuzu engines.
Zenith Engineering
Heavy-duty Isuzu-powered marine gensets from 20 to 100 kVA, built to your vessel’s spec. Trusted in commercial fishing, charter and ferry operations across the Pacific.
Dong-I
Marine gearboxes with hydraulic clutch systems, hydraulic steering systems and power take-offs (PTO). Trusted by manufacturers including Daewoo Heavy Industries and Hyundai Machinery.
Installations, repowers and sea trials.
Building a new boat? Repowering an old one?
Talk to us first.
Marine engines and gearboxes are usually mounted in confined spaces with limited access. Get the install wrong and you’ll be living with it for years. Our engineers focus on getting the details right – fuel system, mounts, ventilation, exhaust, gearbox alignment, controls, instrumentation, sound insulation, the lot.
Every install ends with sea trials. We tune the engine to perform at its best, and we’ll recommend a sea trial whenever you fit a new propeller, trim tabs, or significantly alter your boat.
Marine diesel enginesContact us
Wherever you are. Whenever you need us.
Our marine engineers travel for service work and emergency repairs across New Zealand and throughout the Pacific.
Mistakes made by untrained engineers in foreign ports can be very expensive – we’ll service your engine to the same high standard you expect at home.
And when something goes wrong at the wharf, at anchor, or out at sea, our team is on call 24 hours a day, 7 days a week.
Call +64 9 414 7360
Examples of our work on the water.
The Adventurer II
Shaw Diesels supplied a Gardner 6LXB engine (127HP @ 1500rpm) for The Adventurer II, a replica single-screw, tunnel-hull riverboat for multi-day guided tours on the Whanganui River. The Adventurer II is owned by Jos Ebben, Robert Baldwin and Bob Harris, and was built to brave the 239 rapids and cruise the serene waterways between Whanganui and Taumarunui.
MV Tribu
A major servicing of the main engines – two DEUTZ 620 V6, gensets, and two DEUTZ 1015 V6 – was undertaken on the MV Tribu at Auckland’s Viaduct Harbour.
Alica Craig – engine rebuild
Shaw Diesels rebuilt a Gardner 4L3 and 3 UC gearbox for the famous and remote Cecil Peak Station in Queenstown. The engine is used in a barge that carries supplies across Lake Wakatipu.
Cecil Peak Station
Shaw Diesels rebuilt a Gardner 4L3 and 3 UC gearbox for the famous and remote Cecil Peak Station in Queenstown. The engine is used in a barge that carries supplies across Lake Wakatipu.
Zenji refit
We did a major refit for Zenji, the impressive sailing yacht, while the yacht was based at Viaduct Harbour. The work involved taking the two DEUTZ 616 V12 engines into our workshop for servicing.
Jane Gifford
Prior to the relaunch of the historic Jane Gifford, Shaw Diesels rebuilt her two Gardner 4LW engines. The Jane Gifford was built in 1908 and is the last of the traditional rigged sailing scows in New Zealand. She originally carried granite to Auckland from mines on the Coromandel.
Windana
Our staff serviced two x twin Gardner 6LXB marine propulsion Engines for MV Windana rated at 140HO @ 1700rpm