Re: Getting a jump

Posted by Fred Puhn On 2011/9/16 15:18:29

With 12 volts applied to a 6 volt starter there are 2 potential problems. The starter will spin faster and the temperature inside the starter windings will go up faster. Usually spinning faster will fire the engine quickly and temperature is not an issue. If you have difficulty starting and do not let the starter cool that could damage the windings.

The higher starter speed could possibly damage the teeth on the flywheel or the bendix by impact loading.

Many people have successfully changed from 6 volt to 12 volt electrical systems and never touched the starter.