55989 Zinc or Magnesium Mercruiser button

The 55989 Mercruiser button is a zinc anode. Zinc is a sacrificial metal that will corrode in place of the more expensive metal parts of your boat. This helps to extend the life of your boat's underwater components.

The 55989 button is specifically designed for use on Alpha One gimbal housings. It is a button-style anode, which means that it fits into a hole in the gimbal housing. This location is a common area for corrosion, so the 55989 anode helps to protect this area from damage.

The 55989 button is a relatively easy anode to install. It simply screws into place in the gimbal housing. The anode should be replaced every year or two, depending on the severity of the corrosive environment in which your boat is operated.

There is also a magnesium version of the 55989 button available, which is 55989MG. The magnesium version of the anode is more effective in freshwater, but it will need to be replaced more often than the zinc version.

The best material for an anode will depend on the type of water in which your boat is operated. If you boat in saltwater, a zinc anode is the best option. If you boat in freshwater, a magnesium anode may be a better choice.

Here are some of the features of the 55989 Mercruiser button:

• Made of zinc
• Sacrificial anode that protects other metal parts from corrosion
• Button-style design fits into hole in gimbal housing
• Easy to install
• Should be replaced every year or two

If you are looking for a high-quality zinc anode to protect your Mercruiser Alpha One gimbal housing from corrosion, the 55989 button is a great option. It is made of high-quality materials, is easy to install, and provides effective corrosion protection.