Corrosion concern

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waterdawg60

Cadet
Joined
Jun 21, 2011
Messages
11
I have a 5.7 merc and it does have some pitting on trim cylinders and housing. When I bought it it did not have an fin anode so I installed one now two seaons later its almost gone. Is it normal for this to happen or is there an issue with the grounding. etc. ?
 
G

Georgesalmon

Lieutenant Commander
Joined
Apr 14, 2012
Messages
1,793
Re: Corrosion concern

If your in the water a lot the zinc will be used up. It needs to be replaced. Might even consider installing one on the boat hull.
 
tpenfield

tpenfield

Moderator
Staff member
Joined
Jul 18, 2011
Messages
17,711
Re: Corrosion concern

are we doing salt water?

Anode will last about 6 months in salt.

Do you have anodes on the trim cylinders also?
 
W

waterdawg60

Cadet
Joined
Jun 21, 2011
Messages
11
Re: Corrosion concern

I have had the boat in fresh water for a month but that is all. and no there is no anodes on the trim cylinders. I think the damage was done before I purchased the boat. I will get the anodes for the trim as I do not want this to get worse. just wondering if the anodes were degrading to quickly but I guess not.
 
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