8.1S Horizon Inboards - Zinc Anode?

[pfineberg]

Does the 8.1S inboard/V-Drives have an "Zinc Anode Plug"...like those on the Kohler generator on the coolant side?. No where in the engine manual does it list there being a zinc....

 

[Hampton]

I hope not (because I don't know of one). The Mercathode system takes the place of such a zinc as I understand it. Your engine is linked to the transom zinc through a network of wires which are attached to each of the metal pieces which are exposed to raw water.

 

[Chris R]

John, how is your fresh water flush system holding out. I just had one installed by my dealer. I have not checked it out yet as I have been out of town.

 

[pfineberg]

For all: Just got an answer from my marina (mechanic). Mercruiser does not put the pencil zinc anodes in thier engines. Boats with inboard/outboard configuration have the Mercathode (Cathodic Protection System) installed and that is connected to the "outdrive" of the I/O. True inboards, with V-Drives and shafts, do not have the internal engine zincs. Like said, the engine/shaft, are protected by the hull/transom zinc, and you should put "shaft" zincs on if you don't have them. Sea Ray "does not" install shaft zincs on any of their boats, but many mechanics have told me, to put them on for your own protection. They cost like $12 each, so put one on each shaft about 10" out from where the shaft extrudes outside of the hull.

 

[Hampton]

John, how is your fresh water flush system holding out. I just had one installed by my dealer. I have not checked it out yet as I have been out of town.

Simply awesome. I'm on the second transom zinc in 3 years - in salt and it has several months left on it. The fresh water in the engines seems to radically slow the corrosion process. The mercathode tests well.