Engine block as ground bus?
Looking into adding an ACR to my boat I noticed that all wiring diagrams assume all grounds are connected to a common bus that connects to one point on the engine block.
I have one start battery and two house batteries and other ground circuits all grounded to various points on my gas engine block; a total of 14 grounds grounded to 6 different spots on the engine block.
Is this a potential problem? Continuity between the 6 grounding spots on the block is less than 1 ohm, most are 0.2 to 0.4 ohm.
I can spent the time and money to connect them all to a common bus that connects to the block at just one point, but am wondering if this is going to do anything for me other than just tidying things up?