"Fresh" water fouling and corrosion

harringtondav

Commander
Joined
May 26, 2018
Messages
2,442
I had to slip my boat the last two seasons. Normally I keep it high and dry in a marine rail lift, but water levels and spine surgery didn't allow putting the lift in.
Mississippi river back water marina. No current, stagnant water. The gelcoat crud is fixable, the outdrive corrosion will take more work.
The first Fall I noticed the three year old anode was looking a bit pocked. Last Fall it was more eroded. I may be behind this. I put in a blade battery disconnect due to unknown battery draw down. My disconnect opened the B- since I thought it is a bit wimpy for starter draw. This fixed my dead battery problem, but I'm wondering if this caused the B+ to seek ground through the drive/water and caused the galvanic corrosion.
The boat will be back in the lift this year after I spruce it up, including some spot sanding, primer and touch up paint. ...thinking I should move the disconnect to the B+ terminal.
 

Attachments

  • 1000000439.jpg
    1000000439.jpg
    1.3 MB · Views: 22
  • 1000000440.jpg
    1000000440.jpg
    1 MB · Views: 22

airshot

Vice Admiral
Joined
Jul 22, 2008
Messages
5,418
Wow...that is ugly, especially if that happened over just the past year ! Not an electrician here, but glad I have inside out of the water storage for my boat......good luck..
 
Top