Mercruiser electrolysis / merCathode ?

[abl1111]

Joe,

Does the MerCathode set up have to be plugged into to dockside electric when not in use ( w/ out electricity, will it kill my battery ) ? do the zincs have to bechanged very often, even w/ the MerCathode system ?

Also, I am still playing w/ going w/ a Bravo 2 instead of a Bravo 3. The Bravo 3 sounds great except for the electrolysis. A few questions if you don't mind:

What are the negatives of a Bravo 2 ? My understanding is that it is beefier than the Bravo 1 or 2 and spins a bigger wheel.

The Bravo 3 would be great but the electrolysis and potential maintenance is a little scarey.

I am not looking for exceptional speed. I want a bullet-proof, efficient, drive that moves out well when bolted to a 350MPI Horizon.

Oh, and lastly - this is a bit vague, but someone recommended that when I buy a new motor, that I also buy a part to replace an already existing part, a spline or gear where the outdrive's shaft connects to the motor. The stock part is aluminum and 'should' be replaced w/ this iron replacement part to avoid being stripped. Supposedly, if you idle a lot, the aluminum part, due to harmonics will not hold up as well - and is prone to shearing. Do you know what I'm talking about ( 'cause I don't !)