Overview#
The Doosan G100 delivers 80 kW of prime power (100 kVA) from a Cummins F3.8 engine, the same platform used in the smaller G70 but paired with a larger Stamford alternator for higher output. At 67 dBA at full load, the G100 maintains competitive noise levels for its power class.
Standard dual-frequency switching (50/60 Hz) and the Stamford alternator's motor starting capability make the G100 versatile for both domestic and international temporary power applications. Also sold as the Bobcat PG100.
Cummins F3.8 engine and Stamford alternator#
The G100 marks the transition point in the Doosan lineup from Doosan proprietary engines to Cummins power. The Cummins F3.8 is a 3.8-liter turbocharged inline-4 that delivers 80 kW of prime power with 500-hour oil change intervals — double the 250-hour interval on the smaller Doosan-engine models. This longer interval reduces scheduled maintenance costs and downtime for fleet operators.
The Stamford alternator replaces the Marelli units used on the G25 through G70, providing stronger motor starting capability and broader voltage configuration options. The combination of Cummins engine and Stamford alternator means both major components are serviced through independent, widely available dealer networks — not locked into a single OEM.
Our service experience#
OnPoint services Cummins-powered Doosan generators extensively across Northern California. The F3.8 engine shares the same service procedures familiar to any Cummins-trained technician, and parts availability in the Bay Area is excellent through multiple Cummins distributors. The 500-hour oil change interval is a genuine cost advantage over the Doosan-engine models below the G100. For buyers stepping up from the G70, the transition to Cummins power means access to a broader service network and longer intervals between scheduled maintenance.
