Board Thread:Questions and Answers/@comment-90.131.125.121-20130112170528/@comment-31.54.124.147-20130112181002

For steam and combustion engins you need to put in a power source. (steam engins use use coal, combustion engins use fuel, redstone engins don't need anything) After that you need to put a redstone torch next to them to make them go. (anything that provides a redstone current will also work)