how many zinc's

[steven f]

I've owned my 1981 H33 for just under two years. I've dove under the boat for various reasons (crab pot removal in December is just one of them) but I've only noticed the zinc on the shaft. I've replaced the heat exchanger zinc on a regular basis and the shaft zinc has been replaced twice. I'm just wondering if there are any other areas I should be looking for zinc's, I can't seem to find any other's on the boat. I've seen other boats with zinc's on the rudder and other places. Should I have a zinc on other places?

 

[Tim Schaaf]

strut zinc

There should also be a zinc on the shaft strut. If the boat has the original raw water cooled Yanmar 2QM15 (which yours appears not to have), that engine also has two zincs. The rudder has no zincs. I have had my 33 for almost 19 years now and have dropped the rudder on several occasions but the stainless steel shaft has never had galvanic corrosion...good luck perhaps?