Electrolysis problem

Not sure where to post about this? The past few days I've noticed that I have an electrolysis problem. I'm wondering if anyone knows a simple cure? The anodes on my big engine (9.9 Rude) are showing electrolysis as are the places on the motor where the paint has worn off. Also the hull of my aluminum boat especially around the transom area are showing signs of electrolysis. My Trolling motor doesn't seem to be showing any signs of this YET.

I'm wondering if maybe I can ground my hull to the negative side of my battery to cure this? I'm thinking that would be easier than to go through my whole electrical system looking for a bad ground to some specific system. I've checked all the grounds to my 24 volt battery system... There all good and tight.

Anyone have a simple solution for my problem? I've read that I need to paint the hull copper.. to put zinc anodes on my boat... not to park next to someone with a Positive ground... Not to park at slips at Marina's that have 115 Volt hook ups... These measures sound extreme to me... Seems like there should be a better simpler way to solve this?

Any suggestions appreciated.... Thanks in advance, Brian