Bonding and anodes

[RockAndReel]

I understand the concept of bonding, how it works, the different metals used for different conditions, etc. But I do have a question? is there a big sacrificial anode somewhere on my Albin 28? I have one on my rudder, and there are of course several in the Yanmar. I don't have one on my prop shaft (and was told by my marina that that was OK). I don't see any other anodes and wondered if that was normal.

Thanks in advance.

[Toolmanbob1993]

I have one on the drive shaft,and 2 on each trim tab and 1 on the bow thruster…

[catalina_mike]

Here is what my 99 came with. No stern zinc. Rudder, shaft. If trim tabs were installed they should also have a mushroom zinc like the rudder. I added a large divers dream to the stern and bonded to both bonding strips next to the engine.

[Tree]

One other thing you may not find bonded is the swim platform - mine certainly wasn’t neither was my shaft and prop. In the urgency to get the boat in the water both got missed on a continuity test and cost me the prop and the heads of the bolts on the swim platform started getting eaten away.

Shaft and prop now bonded through the transmission with a strap direct to the busbar. Swim platform now daisy chained to each upright and bonded back to a skin fitting.

Everything now check out for continuity and not had a problem since.

2 1kg zincs on the rudder each side and 1 1kg zinc on each trim tab. One small zinc on the thruster as per manufacturers design and to finish it all off, galvanically isolated through the shore power.