Originally Posted by ripnlips1
Is your T8 electric start or manual pull start? If its an electric start T8 it will put out 6-8 amps. look at which battery the T8 is connected to and use that battery as your primary and the second one as your back up.
A PROPERLY installed battery switch would have the T 8 wired to the COMMON line and thus will charge what ever battery or batteries are turned on.... if they arent wired that way the switch is NULL and your boat doesnt technically meet USCG electrical requirements...
ABOVE 800 CA the electrical system is required to have a shut off switch that can turn off the entire electrical system when selected to the off selection save for fused
automatic bilge pump float switch and or relay. or other safety systems to save the vessel from damage.. if a charge lead is bypassing the switch then the full capacity of the batteries could potentially be shorted to ground if that lead were to fault to ground. and with the lines being the size they are without protection fire will ensue.. the switch is there for overcurrent protection not just convienence.