Where to put zinc anodes?

[Muddlerman]

Just wondering if there was another place to put a zinc besides the cavation plate?<br /> The motor is a 61 Johnson 40hp. There is a Dolphin fin mounted to the plate now.<br /> I have repaired the pitting on the skeg with Marine Tex and primed with zinc chromate.<br /> Just trying to give the old girl the TLC she deserves.<br /> Muddlerman

 

[DJ]

Re: Where to put zinc anodes?

You can put them anywhere that is in constant contact with the water-while running/sitting.<br /><br />The trick is to make sure you have clean connection to bare metal (bolted on) and DO NOT paint the zinc(s).

 

[Paul Moir]

Re: Where to put zinc anodes?

I mounted mine to the side of the lower unit, just above the cavitation plate. I drilled right into the exhaust chamber and tapped the holes to take 1/4" screws. The trouble with that spot is the surface is not flat, so I had to grind quite a lot of material off the back side of the zinc.<br /><br />It's probably not the best spot, and better protection could be had by having two small zincs, one on each side of the lower unit.

 

[Muddlerman]

Re: Where to put zinc anodes?

DO I put the zinc right over the painted surface? or do I scrape where the zinc is going?