ElectroMech Marine
Gearbox Maintenance in Darwin
- Over 25 Years Marine Expertise
- Mobile Servicing Across Darwin
- In-House Shaft Fabrication
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Darwin Gearbox Maintenance
A slipping, grinding or unresponsive gearbox isn’t just frustrating—it can be dangerous when you're out at sea. That’s why ElectroMech Marine in Darwin provides expert gearbox maintenance tailored to marine conditions. Your vessel's transmission works under pressure every time you power up, change direction or reduce speed. Over time, wear and tear on gears, bearings, seals and fluids can lead to performance issues or complete failure. We specialise in identifying early warning signs and carrying out professional inspections, rebuilds and replacements to keep everything turning smoothly.
With over 25 years’ marine engineering experience, we’ve seen just about every transmission issue on the water. Our goal is to prevent downtime and extend the life of your driveline. Submit an enquiry form or email us to book your gearbox service or diagnostic check today.
Cummins Onan Dealer
DC Systems Experts
Hydraulic Repair Services
Offshore Industry Experience
Expert Repairs That Keep You Moving
Marine gearboxes are complex, high-load systems—and they demand expert attention. Our team handles everything from fluid testing and seal replacements to full transmission overhauls and upgrades. We conduct detailed inspections to check for misalignment, worn gears, clutch failure and noise-causing vibration issues. When repairs are needed, we use high-grade parts and proven techniques to restore performance and reliability. We also assist with shaft and hull alignment and can advise on gearbox repower options if your setup needs modernising.

Whether you’re operating a commercial vessel, private cruiser or working boat, well-maintained gearbox systems make all the difference. Let us help you avoid major failures and enjoy smoother sailing.
What are the symptoms of a failing marine gearbox?
Common signs include slipping gears, delayed engagement, clunking noises, difficulty shifting, vibration or visible fluid leaks. You might also notice a burning smell or abnormal engine revving without corresponding speed. These symptoms usually indicate wear on internal components, fluid degradation, or alignment problems. Ignoring early signs can lead to full gearbox failure, which is often far more expensive and time-consuming to repair. It’s best to get your system checked at the first sign of trouble.
How often should a marine gearbox be serviced?
Marine gearboxes should generally be serviced every 250–500 hours of operation, or at least once a year, depending on the type of vessel and usage conditions. Routine servicing includes changing transmission oil, inspecting seals and filters, checking for metal particles in the oil, and testing for smooth engagement. Vessels operating in harsh conditions—such as commercial or offshore use—may require more frequent maintenance to ensure reliability and avoid premature wear.
Can a marine gearbox be rebuilt instead of replaced?
Yes, many marine gearboxes can be rebuilt, which is often more cost-effective than full replacement. Rebuilding involves disassembling the unit, inspecting all parts, replacing worn or damaged components (like bearings, seals, or gear sets), and reassembling it to factory specifications. A professional rebuild can restore like-new performance, extend lifespan and improve efficiency—provided the gearbox housing and major parts are still in good condition.
