A detailed description and history of the engines on all generations of the Boeing 737.
This is a long video. To help you navigate to any parts here is a contents list with timings:
0:00 Intro
0:48 Engine types
8:43 Components
11:33 Upgrades & hushkits
25:45 Oil, Fuel, PMC/EEC
36:06 Ignition & Starting
47:32 Displays
57:15 Vibration
1:02:59 Reverse thrust
1:12:38 Overhead Engine Panel
1:16:13 Engine Ratings
1:21:03 BITE Tests
1:25:35 Limitations