The Stovebolt Site Forums The Shop Area The Electrical Bay 55/2 Hard to start when warm

I also had this problem with my 1951 Chevy 1/2 ton - even after replacing the battery, having the starter rebuilt, replacing both battery cables (with the proper size wire for a 6 volt system) and the ground cable from the engine to the frame. I finally took it to a mechanic who said there was about a 1 volt drop with the negative battery cable. He replaced it (it was a relatively short braided cable that connected to the frame) with one that now connects to the engine block. My problem immediately vanished. It now turns over just as fast when the engine is hot as it does when it cools off.