Main Breaker(s) diode?

[bud37]

I have been thinking about this situation you have there. Something about it bothers me as to the way power was switching sides........doesn't seem right. Maybe have a marine certified electrician have a look at those connections there.
You should have galvanic isolators for each circuit to handle the ground side.....are they still there ? Does it look like someone has been in there before you ?

[tonyiiiafl]

It looks truly original with all the wire ties (yellowed with age) intact. Looks truly original

[bud37]

Tony there are two reasons actually......one was the power issue and the other, in the pic it looks like and tell me if I am wrong that there is a green wire connecting to the neutral bus.

That particular thing is concerning in my mind, if it were me I would have it checked further to find out why.

Do you still have the original galvanic isolators connected ?

[tonyiiiafl]

I have the original galvanic isolators. I am going to take a closer look at that green wire. I truthfully am not sure.

[JohnS]

I dont think that is a diode, i have them on my 350 mariner and took it off to read the numbers. I think it's a thermal fuse between the breakers. I was checking mine because my ac ammeters aren't working and i thought that was the diode.

[tonyiiiafl]

Ahhh. Perhaps that is correct.

[Viper]

Would be interesting to know for sure. As mentioned, look at the numbers and do a Google search.

[JohnS]

it's a surge arrester like this one:
https://www.tme.com/ca/en/details/cg-75 ... use/cg75l/

I forgot the exact number but it's on the arrestor.

[tonyiiiafl]

*I am going into the panel tomorrow. I replaced the outside 30A AC breaker, and now all is working again. I am also going to get the measurements for the AC LED polarity light bulbs.