SailNet Community - View Single Post - extra sacrificial zinc for saildrive
View Single Post
post #1 of Old 03-08-2010 Thread Starter
Senior Member
ArgleBargle's Avatar
Join Date: Jan 2007
Location: Victoria, B.C.
Posts: 179
Thanks: 5
Thanked 1 Time in 1 Post
Rep Power: 11
extra sacrificial zinc for saildrive


I use a galvanic isolator and have an extra zinc "fish" that is coupled to the the common ground on ye boate. no corrosion issues there.

i have yanmar ym30 with SD20 saildrive and flex-o-fold prop.

the saildrive appears to be electrically isolated from the common ground (which i assume is good to keep the aluminum leg from acting as a giant sacrificial anode for the rest of the boat).

i dont like how quickly the saildrive zinc corrodes, so i change it every 6-9 months.

does anyone think adding a second zinc "fish" coupled to the saildrive bolts from inside the hull and hung over the side would appreciably help anything/reduce rate of zinc usage? - i assume those bolts are electrically connected to the leg.

ArgleBargle is offline  
Quote Share with Facebook
For the best viewing experience please update your browser to Google Chrome