Hi team
My new-to-me buick sat for 35 years before I picked her up. While working on my engine (original straight π I was using 12 to turn it over and the starter worked fine, and ultimately the engine now runs. But now I've got the 6 volt battery, it just doesn't have enough ooomph to turn it over. It tries, but only just turns the cream very slowly. I know the starter works, I know the engine works. It was all original, including the starter so I assume it's all 6 volt. What am I missing?