Find an engine | Chapter 2 - New Beginnings DI Riptide Guide

Inside you find few Walkers and one Thug. If you have some good gun you can kill the latter one - otherwise avoid him. Best is to drag him from the exit door and then unlock it. After that you can take him out and buy some time for exploration the workshop.

When it comes to the boat engine, it lies on a shelf in one of corners (screen above). Before taking it out, unlock exit, because it won't go to your inventory - your character will carry it.