Cadet57

There are Four Batteries on a 400SY (and I'm sure the same on other Cruisers) I need to learn/discover/know which Two are the "House Bank" I wish to replace just those.. Appreciate any assistance...

I could use some knowledge here.. I need to replace the House Batteries on a 400SY. Of the Four Batteries does anyone know which Two are the "House Bank" Some (idiot) prior owner replace all four last March with New Batteries...But, they cut corners and replaced them all with Heavy Duty Truck & Van Batteries (Interstate) so... they are out Deep-Cycle and will not re-charge effectively for "House" use.. But.. they seem to be fine for Engine Starting. Any help is appreciated..