OUR SERVICES
MARINE ENGINEERING
Need to book in your Annual Engine Service? Here at D’Aprix Marine we service and specialise in marine diesel engines. D’Aprix Marine Services proudly operates out of The Boat Works Marina, which provides a one stop shop for all your annual servicing needs. From the moment you book in with D’Aprix Marine Services we take care of the rest - lifts & hardstand bookings, berths, trusted trades, referrals to other business and delivery of your vessel to and from the marina. Just let us know what you want and we will get it done.
No request is too small and no service is too large!
We are certified dealers for YANMAR, CUMMINS, CUMMINS ONAN & JOHN DEERE we also support:
CAT Marine Engines
Volvo Penta
MANN Diesel
If you don’t see your engine above, please send us an enquiry or visit us at The Boat Works Marina.
Repower
Is your engine beyond economical repair, consistently letting you down, or simply ready for an upgrade? D'Aprix Marine Services specialises in full marine engine repowers — replacing your existing engine with a new, modern unit that delivers improved reliability, better fuel economy, and greater performance.
We manage the entire repower process from start to finish, including:
Engine selection and specification advice
Removal of existing engine and ancillaries
Supply and installation of new engine and mounts
Exhaust, fuel, and cooling system integration
Electrical and controls installation
Commissioning, sea trial, and handover
As certified dealers for Yanmar, Cummins, and John Deere, we can supply and install new engines direct from the manufacturer — with full warranty support. Browse our recent repower projects to see the quality of our work.
Fault Diagnosis & Mechanical Repairs
Not every problem requires a full service. If your vessel is displaying warning lights, running rough, overheating, losing power, or showing any unusual behaviour, our team can diagnose and resolve the issue quickly and accurately.
We use manufacturer-approved diagnostic tools and software to identify faults across all major engine brands. Our mechanical repair capabilities include:
Engine fault code diagnosis and reset
Injector and fuel system repairs
Cooling system repairs (thermostats, heat exchangers, impellers)
Turbocharger inspection and replacement
Gearbox and transmission servicing
Exhaust system repairs
We'll give you a clear explanation of what's wrong, what it will take to fix it, and a transparent quote before any work begins.
Generator Servicing
As certified Cummins Onan dealers, D'Aprix Marine Services provides professional servicing and repair of marine generators for recreational and commercial vessels. A well-maintained generator is essential for life aboard — from powering air conditioning and appliances to keeping navigation and safety systems running.
Our generator servicing includes:
Oil and filter changes
Fuel filter replacement
Spark plug or injector inspection
Load testing and output checks
Fault diagnosis and repair
Full service record documentation
Whether your generator is playing up or simply due for a routine service, get in touch and we'll get it sorted.
ANTIFOULING SERVICES
Antifouling is one of the most important maintenance tasks you can do for your vessel — and one of the most overlooked. Left untreated, marine growth such as barnacles, algae, and weed can dramatically increase hull drag, reduce fuel efficiency, slow your vessel, and cause long-term damage to your hull and running gear.
At D'Aprix Marine Services, we provide high-quality antifouling services designed to maintain peak performance and protect your investment. We ensure every job is completed with precision, care, and long-lasting results.
What does our antifouling service include?
Haul-out coordination and hardstand booking at The Boat Works Marina
High-pressure hull wash and surface preparation
Application of premium antifouling paint
Propeller and shaft treatment with Propspeed
Zinc anode inspection and replacement
Hull inspection for osmosis, blistering, or damage
We believe the best results start with the best products. That's why we exclusively use:
Jotun Paints — a world-leading marine coatings brand known for long-lasting antifouling protection
Propspeed — a foul-release coating for propellers and running gear that reduces drag and prevents marine growth
MPS Anodes — high-quality sacrificial anodes to protect your vessel from galvanic corrosion
We recommend antifouling your vessel at least once a year, or more frequently if your boat is moored in warmer waters or used heavily. Our team will advise on the right product and schedule for your vessel type and usage.
ANTIFOUL FAQs
What is antifouling and why does my boat need it?
1
Antifouling is a specialised paint applied to the underwater hull of a vessel to prevent the build-up of marine growth such as barnacles, algae, weed, and slime. Marine growth accumulates rapidly and can significantly increase drag, reduce fuel efficiency, damage your hull's gelcoat or paint, and affect the performance of running gear including shafts and propellers. Regular antifouling is one of the most important forms of preventative maintenance for any boat kept in the water.
How often should I antifoul my boat?
2
For most recreational vessels in, antifouling is recommended every 12 months. However, the ideal frequency depends on several factors: how much time your boat spends in the water, whether it's moored or trailered, the type of antifouling product applied, and local water conditions. Boats that are moored full-time in warm estuarine water (like the Gold Coast) typically require annual antifouling at a minimum, while occasionally trailered boats may get away with every two years.
Can I antifoul my boat myself, or should I use a professional?
3
While antifouling can technically be done as a DIY job, professional application ensures the surface is correctly prepared, the right product is chosen for your vessel type, and the paint is applied to the required film thickness for maximum longevity. Incorrect preparation including inadequate sanding, not removing old incompatible coatings, or skipping a primer is the most common reason antifouling fails prematurely. At D'Aprix Marine Services, we have the equipment, expertise, and access to quality products to get the job done right at The Boat Works marina.
How long does an antifouling service take?
4
A standard antifouling job typically takes one to three days, depending on the size of the vessel, the condition of the existing antifoul, and how many coats are required. This includes haulout, pressure washing, surface preparation, antifouling application, and relaunch. Our team will give you a more accurate timeframe once we assess your vessel's current condition.
How much does it cost to antifoul a boat?
5
Antifouling costs vary widely depending on your vessel's length and beam, the condition of the existing hull, the type of product specified, and the number of coats required. As a general guide, you should budget to include haulout, return to water and shed fees, surface preparation, and the antifouling application itself. The best way to get an accurate figure is to contact our team directly, we'll assess your vessel and provide a straightforward, transparent quote with no surprises.
General FAQs
How often should a marine diesel engine be serviced?
1
Most marine diesel engines should be serviced every 100–250 hours of operation, or at a minimum once per year, whichever comes first. Engines that sit unused for long periods can be just as susceptible to issues as heavily used ones, as fuel degrades, seals can dry out, and cooling passages can corrode. If you're unsure of your engine's service history, our team can assess its current condition and recommend the appropriate service schedule.
How do I know if my marine diesel engine needs a service?
2
Common signs your engine is due for a service include increased fuel consumption, difficulty starting, loss of power under load, unusual smoke from the exhaust, overheating, rough running, or unusual noises. If your vessel hasn't been serviced in over 12 months or 100 hours, it's worth booking in regardless of whether symptoms are present, preventative maintenance is always cheaper than reactive repairs.
What happens if I skip my annual boat service?
3
Skipping an annual service may seem like a cost saving in the short term, but it significantly increases the risk of unexpected breakdowns on the water, which can be costly, dangerous, and stressful. Small issues like a worn impeller, degraded fuel, or a failing belt can quickly escalate into major engine damage if left unaddressed. For vessels used commercially or under AMSA survey, regular servicing is also a compliance requirement.
How do I know when it's time to repower my boat?
4
Key indicators that a repower may be the right choice include: your engine has exceeded its expected service life (typically 3,000–5,000 hours for a well-maintained diesel), repair costs are becoming disproportionate to the engine's value, parts are increasingly difficult to source, or your vessel's performance no longer meets your needs. A repower can dramatically extend the life of an otherwise sound vessel and often works out more cost-effective than purchasing a replacement boat.
How long does a marine repower take?
5
The duration of a repower depends on the size and complexity of the installation, engine availability, and whether custom fabrication is required for mounts, exhausts, or controls. A straightforward like-for-like replacement can take as little as one to two weeks, while a more complex installation involving new engine beds, shaft alignment, or full electrical integration may take three to four weeks or longer. Our team will provide a detailed timeline and keep you informed throughout the project.
What are the most common marine engine repairs?
6
The most frequently seen marine engine repairs include impeller replacement, heat exchanger cleaning or replacement, injector servicing or replacement, thermostat replacement, raw water pump rebuild, gear box servicing, and shaft seal replacement. Electrical faults, including alternator failure, starter motor issues, and wiring corrosion are also common, particularly on older vessels or those kept in salt water environments.
Can my boat be repaired on the water, or does it need to come out?
7
Many repairs can be carried out afloat, including engine servicing, electrical fault finding, fuel system work, and most mechanical repairs above the waterline. However, work involving the hull, running gear, shaft seals, stern drives, or antifouling requires the vessel to be hauled out. D'Aprix Marine Services operates from The Boat Works in Coomera, which has full haulout and hardstand facilities, making us equipped to handle both afloat and out-of-water repairs efficiently.
How often should a marine generator be serviced?
8
Marine generators should generally be serviced every 250 hours of operation or annually, whichever comes first. Like main propulsion engines, generators that sit unused for extended periods still require periodic servicing to prevent fuel degradation, corrosion, and seal deterioration. Regular servicing also ensures your generator will start reliably when you need it most, especially important for liveaboards, commercial vessels, and long-range cruisers.
Check out some of our 5 star reviews!
“Tim and his team delivered exceptionally well on our project. They replaced our entire failed anti-foul system and serviced and did a bunch of deep preventative work on all four diesels aboard. What a bunch of pro's, communicated well, did the job well and did what they said they would, when they said they would. Highly recommend.”
- Jay
“Happy to recommend Tim. My boat has never run so well. He also installed a new stereo system & a complicated sounder Including 2 thru hull transponders. All the workmanship was fantastic, the boat was clean and ready to go.”
- David
“Great business to deal with. They turn up when they say they will and their mechanics are excellent leaving a clean complete job with every thing tested and working as it should be. Would highly recommend them.”
- Peter
“Professional, reliable and a great friendly service. I highly recommend this company.”
- Alana
“Excellent and timely service on my Yanmar. Recommended to anyone in the Gold Coast looking for professional mechanical services for their boat.”
- Billy
“I am most impressed with Tim. He lets you know when he is coming on time every time. His trades are one of the nicest tradesman have ever worked on my boats the last 40 years. Very highly recommend D'Aprix Marine Services. I only wish that I would have known him years ago.
- Zol