I recently purchased a 1968 Carina 20' pleasure boat with a Mercruiser 140 I/O. I wanted to try to fix her up and get her running, but she's been very stuborn so far. I honestly don't even know where to start with it. I bought a new battery in hopes that I would at least be able to get any readings from the gauges and so far there's nothing at all. If anyone has any ideas on what to do with her, I'd be more than appreciative. thanks.