Marine Mechanic in Grafton

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Inboard wake and ski boats aren’t just toys—they’re precision machines that need the right care to stay reliable and perform at their best. If you’re looking for a marine mechanic in Grafton, OSP Automotive & Marine offers specialised servicing for inboard engines, including routine maintenance, repairs and performance adjustments tailored to your boat.

With over 35 years of combined experience, we know what to look for, how to fix it and how to keep your boat in top shape season after season. Call (02) 6695 2155 to book your inboard boat service with us today.

When your boat’s not running right, your weekend is wrecked. That’s why we approach every inboard service like it’s our own setup on the line.

Whether you’re chasing more responsiveness out of your turns, better throttle control, or peace of mind before a long haul, we’ll make sure your boat is tuned to perform exactly how it should.

We get how much this matters—because it’s more than just an engine, it’s your summer, your family time, your freedom.

Our marine servicing is designed to keep you moving, not stuck at the ramp or stranded halfway upriver. Let us handle the maintenance so you can focus on carving glassy water and making every trip count.

Do I need to service my boat even if I haven’t used it much?
Yes, even with minimal use, components can degrade over time. Fuel can go stale, corrosion can set in and seals may dry out. Annual servicing is essential to keep your wake boat ready and reliable for the water.
What’s included in a standard wake or ski boat service?
A typical service covers oil and filter changes, fuel system inspection, impeller replacement, belt checks, spark plugs, battery test and a full systems inspection. It also includes greasing fittings, checking the prop and shaft alignment and ensuring the bilge pump and electrics are all working properly. Servicing helps extend engine life and improves safety, especially when towing skiers or wakeboarders.
How often should I service my inboard ski or wake boat?
Most manufacturers recommend servicing your inboard boat every 12 months or 100 hours of use, whichever comes first. However, if you're using it in saltwater, towing regularly or running high-performance setups, more frequent servicing may be needed. Regular maintenance helps prevent breakdowns, keeps the cooling and fuel systems clean and ensures your engine delivers smooth, reliable power every time you’re out.