Is there zinc in an I/O engine ?

[mike456]

I have a 5.7L 1992 Mercruiser. I know that the outdrive has zinc pieces that must be replaced. Another boater that I know contends that all I/O engines have zinc piece in the engine that also need to be replaced. Is this true? If so how do I find them on my engine? Thanks

 

[Don S]

Re: Is there zinc in an I/O engine ?

The pencil zincs are usually found in the heat exchanger on boats with closed cooling systems, and in a few oil coolers (not Mercruiser).<br />The one in the heat exchanger is usually located on the bottom of the heat exchanger on the starboard side. Like I said, MOST, but not all.

 

[f_inscreenname]

Re: Is there zinc in an I/O engine ?

I have two in my exhaust manifolds but they are custom aftermarket manifolds

 

[trog100]

Re: Is there zinc in an I/O engine ?

i have a big anode connected to my engine block by a thick electrical cable that i hang over the back of the boat.. the boat stays in the water all year round.. <br /><br />dunno whether or not it does any good but its covered in some nice deep corrosion pits so i assume it does..<br /><br />trog