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.
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.
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.
Engineering specifications
Physical
Length
166.1 in
Width
72.4 in
Height
94.7 in
Wet weight
6,300 lb
Acoustic
Sound @ 7m, full load
67 dBA
Enclosure
Sound-attenuated
Fuel system & runtime
Integral fuel tank
172 gal
Request a quote
Get pricing & lead time on the Doosan G100
Tell us about the application — kW, voltage, application, install timeline — and we'll respond within one business day with budgetary pricing, lead time, and any sizing notes.
Adjust load percent and tank size to estimate runtime. Pre-filled with this model's spec where available.
Estimate runtime on this tank
Estimated runtime
36.2 hours(1.5 days)
Fuel consumption ≈ 4.75 GPH at 75% load. Estimate based on industry-typical 1800 RPM standby curves (≈0.07 GPH/kW at full load). Actual consumption varies by engine, ambient temperature, fuel quality, and tuning.
Service intervals
Manufacturer-recommended intervals for the Doosan G100 under standby duty. Field intervals may differ based on load profile, ambient conditions, and fuel quality.
Oil & filter
Every 500 hours or 12 months
Air filter
Every 500 hours
Fuel filter
Every 500 hours
Major overhaul
≈ 20,000 hours
Common failure modes
What we've seen fail on this platform. Use as a service-planning reference, not a diagnostic — actual failure modes depend heavily on duty cycle and maintenance history.
Component
Symptom
Typical hours
Severity
Fuel filter
Restricted flow, hard starting, power loss under load
500+
minor
Battery
Failed to start or slow cranking after extended storage
4,380+
minor
Coolant hoses
Weeping at clamp connections, slow coolant loss
5,000+
minor
Frequently Asked Questions
What is the standby power rating of the Doosan G100?
The Doosan G100 delivers 88 kW standby and 80 kW prime power. It is the first Cummins-powered model in the G-Series lineup, stepping up from the Doosan-engine D34 used in the G70. Also sold as the Bobcat PG100.
What engine does the Doosan G100 use?
The G100 is powered by a Cummins F3.8 3.8-liter inline-4 turbocharged diesel engine running at 1,800 RPM. The F3.8 platform is Cummins' compact mid-range diesel, offering 500-hour oil change intervals — double the 250-hour interval on the smaller Doosan-engine models.
What are the service intervals for the Doosan G100?
Oil changes are due every 500 hours or 12 months, whichever comes first — an improvement over the 250-hour interval on the smaller Doosan-engine models. Air filter and fuel filter replacement intervals are 500 hours. Major engine overhaul is specified at 20,000 hours.
Is the Doosan G100 EPA compliant?
Yes. The G100 is EPA Tier 4 Final compliant. The Cummins F3.8 meets current U.S. emissions requirements. The 172-gallon integral tank and standard dual-frequency switching (50/60 Hz) make it suitable for domestic and international temporary power applications.
How does Doosan compare to Cummins or CAT at the 100 kVA class?
The G100 uses the same Cummins F3.8 engine found in other brands' 100 kVA generators. Doosan pairs it with a Stamford alternator and CoolBox enclosure at 15-30% below CAT pricing. The Stamford alternator provides broader motor starting capability than the Marelli units on smaller Doosan models.
What control panel does the Doosan G100 use?
The G100 is equipped with Doosan's digital control panel supporting auto-start, manual start, fault monitoring, runtime tracking, and voltage/frequency display. The panel is integrated into the CoolBox enclosure for weather protection in outdoor deployment.
Who services Doosan generators in Northern California?
OnPoint Generators services Cummins-powered Doosan generators extensively across Northern California. The Cummins F3.8 in the G100 is serviced through Cummins distributor networks in the Bay Area, and our technicians are Cummins-familiar with access to local parts inventory.
Similar models
Doosan / Bobcat
Doosan G70
Largest Doosan-engine model — D34 turbo delivers 56 kW at 64 dBA, quietest in the 70 kVA mid-range class. DOC+SCR aftertreatment, no DPF to manage.
60 kW standby · Diesel · Liquid-cooled
Mid-range construction sites, commercial temporary power, rental fleet workhorse units, and mixed single/three-phase jobsite loads.
56 kW prime diesel portable generator. Doosan D34-powered with 64 dBA operation, Marelli alternator, and dual-frequency switching.
Tier 4 Final3-phaseconstructionrental-fleet
Doosan / Bobcat
Doosan G50
37-hour runtime on 110-gallon tank — longest in the 50 kVA portable class. Same D24 engine and chassis as G40, giving fleet operators parts commonality.
42 kW standby · Diesel · Liquid-cooled
Multi-day construction sites needing more than 30 kW, commercial temporary power, rental fleet mid-range units, and dual-frequency international projects.
38 kW prime diesel portable generator. Doosan D24-powered with 64 dBA operation, 110-gallon tank, and 37.2-hour runtime.
Tier 4 Final3-phaseconstructionrental-fleet
Doosan / Bobcat
Doosan G40
110-gallon tank delivers 24+ hour runtime at full load — class-leading for 40 kVA portables. CoolBox enclosure at 64 dBA matches WhisperWatt pricing 15-30% lower.
34 kW standby · Diesel · Liquid-cooled
Multi-day construction sites, commercial renovation backup, rental fleet mid-range units, and temporary event power.
30 kW standby diesel portable generator. Doosan D24-powered with 64 dBA operation, CoolBox enclosure, and 110-gallon tank.
Tier 4 Final3-phaseconstructionrental-fleet
Need service or parts for the Doosan G100?
We service every major OEM and stock genuine parts for the most common models.
