Featuring in Practical Boat Owner magazine, we struggled with our exhaust manifold just before setting off back to the UK. It was still only late August at the time but 2017 was especially turbulent in the Atlantic and weather windows back to the UK South Coast from Norway were scarce!
An anode is a sacrificial piece of metal that corrodes more quickly than the other metal it is attached to. This little piece of chemistry means that we can use Zinc on our propeller shaft to protect our propeller, the shaft itself and the engine from corrosion since the zinc ‘anode’ wastes away first. They are generally replaced once per year but since they are underwater, can be a pain in arse to both check and replace without the boat being lifted out. That is costly and boring so this is how we do it!