This book is written for all people working in diesel generators business and specially for design and technical sales engineers who are welling to increase their knowledge in this subject. The book has nine chapters and covers all diesel generator auxiliary systems and instruments. It provides useful information, and is considered to be a good introductory book on diesel generator design. The book covers the diesel engine ratings and categorization, engine components, speed governing, electronic engine controls, fuel system, cooling system, coolant specs, lube oil system, oil specs, exhaust system, exhaust muffler and pipe sizing, electric starting system, battery and battery charger sizing, genset sensing instruments (switches, senders, RTD's, TC's, MPU's), genset indicating instruments. The book includes some tutorial questions at the end of each chapter.