[Tommy]

Forgive me for wandering a little off topic here. ... During my very poor college days, I owned a 1951 GMC panel truck with the original 6 volt electrical system. As the engine became more worn out, I found it wouldn't start with the RPM the 6 volt starter provided. The cheapest temporary solution was to buy a second 6 volt battery. I wired it so I could change from parallel to series by flipping a gate switch. To start the engine, I'd put the switch in series and run 12 volts to the starter. As soon as it started, I'd flip the swith back to parallel so the 6 volt generator could recharge both batteries. ... That starter really spun up fast with double the normal voltage.