- Jul 10, 2020
- 161
- Boat Info
- 1981 310 Vanguard Express
- Engines
- Twin Mercruiser 6.2 MPI Horizon FWC inboards
Just discovered this, probably old news to most here but in case it's not...
On top of the Merc exhaust manifold near one end theres a small plug. The OEM, Sierra, and Barr castings have this feature. If you remove that plug, you have clear sight into the exhaust chamber. You can shine a light or stick an inspection camera in and easily see if you have water collecting where it shouldn't. With a semi-rigid camera you can get right up and inspect the gasket too. This is much easier than pulling the elbow, buying a new gasket etc. Makes an in-water inspection trivial.
On top of the Merc exhaust manifold near one end theres a small plug. The OEM, Sierra, and Barr castings have this feature. If you remove that plug, you have clear sight into the exhaust chamber. You can shine a light or stick an inspection camera in and easily see if you have water collecting where it shouldn't. With a semi-rigid camera you can get right up and inspect the gasket too. This is much easier than pulling the elbow, buying a new gasket etc. Makes an in-water inspection trivial.
