How do you keep the cranking battery charged up?
Battery in question INTERSTATE 24M-RD Cranking AMPS 500 Reserve Capacity 75. Battery has some code hot stamped code "SP3OCTNC" on edge of top. Is this the date of mfg???
I just purchased a new boat in Oct 2008 and have about 24 hours on the MERC motor.
I find that when out trolling and watching my 997 Si and with the aerator pump running that the 997 shows WARNING LOW VOLTAGE after about 3 hours. I have the low voltage warning setting on 10.5V. Fluid level in all cells are not quite up to the full indicators, but are not down to the top of the plates.
I am not trolling off of the cranking battery, I have two deep cycle batteries for that purpose.