I'm trying to decide if it would be possible to use a stepper motor to replace a current 12V DC brushed motor that is used to turn over a small (~149cc) gas engine for starting.
The reason why is, I would like to use the stepper motor to generate some small current when it isn't in starting mode. I can't do this with the current brushed motor setup, as that would wear out the brushes.
My idea is that using a stepper motor would give it dual purpose: starting the engine, and generating small current when the engine is rotating it.
The current brushed motor has 0.3 ohms of resistance, but I'm not sure of it's torque capacity, so I need help picking out an equivalent stepper motor. Here's a link to the current motor: GY6 150cc starter motor
If you do not think it's feasible (like if the suitable capacity stepper motor is too big or too costly). I would like other solutions as well if you have any feedback.