Hello crew. I hope all is well.
At the end of last season I posted a few images of what seems to be some sort of corrosion issue around any thru hull component on my 36 ft. Mariner. Most folks suggested that it may be a 'bonding' issue.
Yesterday as I am preparing for a new season, we checked the bonding and the ohmmeter readings showed that the bonding does seem to be concurrent to the engine block and back to the stern zinc.
I do recall in a fairly recent post that our resident expert 'Viper' suggested that 'over zincing' can cause additional problems. Praytell....
can this be the issue with my boat.
I have the following zincs in place, again she's a 36: bow thruster, 2 zincs per shaft, one 5" zinc on each tab and the 'zinc block' on the stern.
The only difference this past season is that I put 'heavy' gauge zincs on the shaft. The zincs that experienced the most 'pitting' and wear seem to be the pieces on the trim tabs.
My mechanic suggested that he has seen this before and attributed it to conditions with the 'dock' and stray current, etc. He doesn't know if anything is wrong with the boat and is not familiar with 'over zincing'. The marina workers think its a boat issue.
What say you? All feedback is appreciated and thank you.