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Mercruiser Manifolds & Risers Australia
Shop Mercruiser manifolds and exhaust risers designed to protect your engine from corrosion, overheating, and costly internal damage. At Boaters World, we stock genuine and high-quality aftermarket replacement manifolds, risers, spacers, and complete kits to suit Mercruiser V6 and V8 engines.
Whether you need a complete manifold and riser kit, replacement marine manifold, exhaust riser elbow, or spacer plate, we supply durable solutions built for harsh saltwater and freshwater conditions. All components are matched for correct fitment and long-term reliability.
Shop Mercruiser Manifold Components
- Mercruiser Manifold & Riser Kits – Complete matched systems for simplified installation.
- Mercruiser Exhaust Manifolds – Wet joint and dry joint options for V6 & V8 engines.
- Mercruiser Exhaust Risers – Replacement elbows for efficient exhaust cooling.
- Mercruiser Exhaust Spacers – Spacer plates for correct manifold and riser alignment.
Wet Joint vs Dry Joint Mercruiser Manifolds
Mercruiser engines use either a wet joint or a dry joint exhaust system. Selecting the correct style is essential for proper cooling performance and long-term durability.
- Wet joint systems allow cooling water to pass through the gasket surface between the manifold and riser.
- Dry joint systems separate water and exhaust gases, reducing corrosion risk and improving gasket longevity.
If you are unsure which system your engine uses, our team can assist with accurate identification.
Why Replace Your Mercruiser Manifold or Riser?
- Prevent water intrusion into engine cylinders
- Reduce risk of engine overheating
- Maintain correct exhaust gas flow
- Minimise internal corrosion
- Avoid expensive engine rebuilds
Suitable for Popular Mercruiser Engines
We stock manifolds and risers to suit popular Mercruiser small block and big block engines, including 4.3L, 5.0L, 5.7L, and 7.4L configurations. Both OEM and aftermarket options are available to suit your budget and performance needs.
When Should You Replace Mercruiser Manifolds?
In saltwater environments, manifolds and risers are typically inspected annually and often replaced every 3–5 years, depending on usage. Early signs of failure include rust flakes in the exhaust, overheating, water leaks, or reduced engine performance. Proactive replacement helps prevent severe internal engine damage.
In Stock & Ready to Ship Australia-Wide
We keep popular Mercruiser manifold and riser kits in stock for fast dispatch across Australia. Trusted by marine mechanics and boat owners nationwide, our components are selected for durability and reliable performance.
Browse the categories above to find the correct Mercruiser exhaust manifold, riser, or kit and order online today.
Frequently Asked Questions
Are Mercruiser manifolds and risers interchangeable?
No. Wet joint and dry joint systems are not interchangeable. Always confirm your engine model before ordering.
Can a faulty riser damage my engine?
Yes. A leaking exhaust riser can allow water into the cylinders, potentially causing severe engine damage.
Do I replace manifolds and risers together?
It is recommended to replace both together to ensure even wear and prevent premature failure.
