ORIGINAL: HighPlains
You need to understand the internal resistance of batteries. That combined with the internal resistance of the starter limits the current of any voltage source. You can not increase the amps to the motor without increasing the voltage at the terminals of the starter.
If you have to 12 volt batteries, one with an internal resistance of 0.1 ohm and the other with an internal resistance of 0.5 Ohms and attempt to pull 10 amps from each battery. The first battery would supply 11 Volts while the second would only supply 7 Volts.
i really didnt understand what you just said....im not all there when it comes to technical stuff like that.... all i know was when i ran only one 12v hobby battery, fully charged it would barely turn my 150 4 stroke...i gave that battery to a friend and bought 2 identical 12v hobby batteries and wired them in a parallel and it made a huge difference in the torque...my starter has the grunt to start large glow engines
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