The PSS Shaft seal is what keeps the water out of Nandji. It was very easy to install and will last a very long time. The seal is created by the smooth stainless rotor that is attached to the shaft and rotates. This applies pressure to the carbon bellow that is stationary and attached to the stern tube.
The Sigma Drive is an engineering genius. This replaces the need to have a coupling joining the shaft to the gearbox. The Sigma Drive allows up to 3 degrees in variation therefore adding a good sense of security of never doing damage to our gearbox or cutlass bearings. We aligned the shaft to gearbox with the normal coupling, then removed and installed the Sigma Drive. As Nandji is a wooden boat, normally we would have to realign the engine in the water as the boat takes her shape once again, but with the Sigma Drive, no need for that!