This may be a stupid question but here it goes.. I am putting in new motors. There is a blue box with mercathode on it.. Is that part of the mercury ignition and do i have to install this back in the boat. I am putting Msd ignition on the new motors..

I am thinking that this helps with the electrlosis some how..

Yes - it is supposed to mitigate electrolosis....

http://www.offshoreonly.com/forums/s...ght=mercathode

here is a thread that should answer your questions . it is not part of your ignition system.

hope this helps..

good thread, always wondered what the point of that system one. i have one on the port motor and thats it.. is there any maintenance required on these?

Thanks guys thats some good info...