(Question submitted by Brad)
In 2002 MerCruiser switched from using wet joint manifolds to dry joint manifolds. Each type have a natural lifespan:
- Wet joint manifolds: 4 years
- Dry joint manifolds: 7 years
So the short answer is that your manifolds need to be changed at least once every 4-7 years (depending on type).
If you're using aftermarket parts, these timelines are often significantly shorter so it's worth having them checked a little more frequently.
If you're unsure about what type of manifold your MerCruiser has, feel free to give us a call on (03) 4216 5411 and we can help identify it for you.
It's also worth checking your manifolds if you notice:
- Surface rust
- Water leaks
- Overheating
These can (but not always) be signs that your manifolds have corroded and need changing. As with everything it always pays to be overly safe than sorry in these circumstances.
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