It occurred to me that I know absolutely nothing on engines of any kind. Now recently I got my boaters license and I did learn the difference between outboard and inboard motors. I’ve also been practicing to start and run an outboard motor on a fairly small dingy, however that does not teach me how to repair an engine! So I’ve invested in the book Boatowner’s Mechanical and Electrical Manual: How to Maintain, Repair, and Improve Your Boat’s Essential Systems.
This book turns out to be more like a textbook. Kind of intimidating but actually once I started to read it, I realize it is going to teach me every little detail of an engine… starting with how batteries are designed and function!