Exhausts Outlets/Water locks

Shop exhaust outlets and waterlocks at Bosun's Locker for marine engine exhaust systems. Our range includes transom exhaust outlets, through-hull fittings, lift mufflers, waterlocks, and exhaust hoses designed for vessels throughout the Gold Coast, Brisbane and SE Queensland, and the Tweed Coast. Quality marine exhaust components that prevent water backflow and ensure safe engine operation.

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Exhaust Outlets & Waterlocks: Quality You Can Trust
At Bosun's Locker, we stock exhaust system components engineered for safe exhaust discharge and water separation in Australian marine conditions. Our range includes stainless steel transom outlets, bronze through-hull exhaust fittings, lift mufflers with integral waterlocks, inline waterlocks, and flexible exhaust hoses made from marine-grade materials with high-temperature resistance and corrosion protection. These components prevent water backflow into engines, reduce exhaust noise, and safely discharge exhaust gases whether your boat operates on the Gold Coast or throughout Brisbane and SE Queensland. Each product features proper drain provisions, adequate capacity for engine size, secure mounting systems, and robust construction that ensures reliable exhaust system operation essential for preventing catastrophic engine damage from water ingestion.

Comprehensive Range of Exhaust Products: All Your Needs Covered
We stock exhaust components for every engine configuration and installation requirement. Our inventory includes plastic and stainless steel exhaust outlets in various diameters, side-discharge and center-discharge transom fittings, lift mufflers sized for different engine capacities, waterlock silencers for inboard installations, high-temperature exhaust hoses, exhaust hose clamps rated for marine use, exhaust flanges and adaptors, and replacement check valves. Serving the Tweed Coast and surrounding areas, we carry components compatible with inboard diesels, petrol engines, and sterndrive installations. Clear specifications for hose diameter, waterlock capacity, and temperature ratings make selecting appropriate exhaust components straightforward for your engine type and installation requirements.

Expert Advice and Support: Your Boating Partner
Bosun's Locker provides expert guidance on exhaust system components and installation for safe engine operation. Our team understands the requirements for proper waterlock sizing, exhaust routing, and component placement based on engine type and hull configuration across the Gold Coast and Brisbane and SE Queensland. We'll help you select appropriate waterlock capacity for your engine, choose correct hose sizes and materials, calculate proper exhaust routing to prevent backflow, and recommend installation techniques. Get personalized advice backed by marine engine systems knowledge. Browse our exhaust component collection and equip your boat with quality parts that prevent water damage and ensure safe exhaust system operation.

- Questions

What is a waterlock and why do I need one?

Waterlocks prevent water from backing into your engine through the exhaust system on Gold Coast vessels. They create a water trap that blocks backflow when waves, wake, or backing down push water up the exhaust throughout Brisbane and SE Queensland. Without proper waterlocks, engines can hydro-lock causing catastrophic damage. All inboard installations require adequate waterlock protection.

How do I size a waterlock for my engine?

Waterlock capacity should be approximately three times your engine's exhaust manifold volume on the Tweed Coast. Larger engines need bigger waterlocks. Manufacturers specify minimum waterlock size based on engine displacement throughout Brisbane and SE Queensland. Undersized waterlocks fill with water and lose effectiveness. Installation position also affects sizing, with lower installations requiring larger capacity for safety margin.

What causes water to back up into the engine?

Common causes include inadequate waterlock capacity on Gold Coast vessels, waterlock positioned too low, exhaust outlet below waterline when stationary, blocked exhaust system, or backing into following seas throughout Brisbane and SE Queensland. Proper system design with adequate waterlock size and correct exhaust routing prevents backflow issues. Annual inspection ensures components function properly.

Can I replace my exhaust hose with standard hose?

Never use standard hose for marine exhaust on the Tweed Coast. Exhaust hoses must withstand high temperatures, resist exhaust gases, and handle marine environments. Standard hoses fail quickly, causing dangerous exhaust leaks and potential fire hazards throughout Brisbane and SE Queensland. Use only marine-rated exhaust hose meeting temperature specifications for your engine type.