14-09-2021, 10:36 PM
Good earthing is particularly important for the starter. At 6v the starter will draw twice the current drawn by a 12v motor for any given power requirement. I have never been aware of heavier wiring for 6v motors than for 12v, but the voltage drop at a given load will be be twice as much for a motor at 6v as it is at 12v. In my experience the majority of slow starter motor problems (giving poor starting) are caused by poor connections such as screws holding the cable into the battery clip. Soldered connections are far superior. Far less frequently the problem is in the motor, and it will need less attention if it is enabled to spin as fast as possible by having good connections so that the engine starts more easily, meaning a shorter period of having the motor on full load. Sorry to labour the point but it is well worth attending to such things.