Zinc Fish

[grjfield]

I've read several posts where zincs on saildrives are changed from as frequently as monthly to yearly. I have not changed mine in 2 years and they appear to have not deteriorated at all. I dive and inspect on a regular basis.

Is there a standard time for replacing zincs, or is it dependent on the amount of decay on the zincs?

My sailboat is 'stripped out' and I have the 'minimum' when it comes to electrical on board (led lights, depth sounder, running lights, circuits for gps, radio). As well, my electric saildrive is isolated from all other electrics and the saildrive itself is isolated electrically from the motor (by the belt).

I'll be pulling the boat out this summer and will bottom paint..but if the zincs are intact..is it ok to leave them alone and continue inspections until decay is apparent.

Thanks
G