The John Deere 4045HFG04 is a 4.5-liter, 4-cylinder inline 4 diesel engine used in commercial and industrial generator applications in the 60-85 kW class. Turbocharged Intercooled for reliable power density across standby and prime-rated duty cycles.
This engine powers generators from Blue Star Power Systems, Kohler, making it one of the more widely deployed prime movers in its power class for the commercial standby market.
Generator models that ship with or are commonly paired with the John Deere 4045HFG04.
Atlas Copco
Atlas Copco QAS 125
±0.25% voltage regulation, 500-hr service intervals, 166-gal tank for extended runtime at 100 kW prime
110 kW standby · Diesel · Liquid-cooled
Large construction sites, emergency temporary power, and rental fleet deployment needing 100 kW portable output
100 kW prime diesel portable generator. John Deere 4045-powered with 73 dBA operation, Leroy Somer alternator, and 166-gallon tank.
Tier 4 Final3-phaseconstructionrental-fleet
Atlas Copco
Atlas Copco QAS 95
Swedish-engineered QAS series — 5-8 dB quieter than competitors with best fuel efficiency and runtime in class.
83 kW standby · Diesel · Liquid-cooled
Rental fleets in Atlas Copco compressor ecosystem, noise-restricted urban construction, and events.
95 kVA (76 kW prime) portable diesel generator. Swedish-engineered QAS series with John Deere engine.
Tier 4 Final3-phaseconstructionrental-fleet
Blue Star Power Systems
Blue Star JD60-04FT4
Open Basler controller + John Deere engine + Stamford alternator — Tier 4 Final compliant, no proprietary lock-in. Serviceable by any qualified tech.
60 kW standby · Diesel · Liquid-cooled
60 kW Tier 4 Final diesel standby for commercial and light-industrial facilities requiring current emissions compliance and component independence.
60 kW Tier 4 Final diesel standby/prime generator from Blue Star Power Systems. John Deere 4045HFG04 4.5L inline-four with SCR/DOC, DSE DCP7310 controller, 208-600V.
Tier 4 Final3-phasecommercialsmall-commercial
Blue Star Power Systems
Blue Star JD60-04FT4MP
Open Basler controller + John Deere engine + Stamford alternator — trailer-mounted, no proprietary lock-in. Serviceable by any qualified tech.
60 kW standby · Diesel · Liquid-cooled
60 kW Tier 4 Final mobile diesel for construction sites, emergency response, and temporary power where portability and clean emissions matter.
60 kW Tier 4 Final mobile trailer diesel generator built by Blue Star Power Systems. John Deere 4045HFG04 four-cylinder engine, Stamford UCI224F alternator, DSE DCP7310 controller, 250-gallon integrated fuel tank.
Tier 4 Final3-phaseconstructiontemporary-power
Blue Star Power Systems
Blue Star JD80-03FT4
Open Basler controller + John Deere engine + Stamford alternator — Tier 4 Final compliant, no proprietary lock-in. Serviceable by any qualified tech.
80 kW standby · Diesel · Liquid-cooled
80 kW Tier 4 Final diesel standby for commercial, multi-family, and institutional facilities requiring current emissions and component independence.
80 kW Tier 4 Final diesel standby/prime generator from Blue Star Power Systems. John Deere 4045HFG04 4.5L inline-four with SCR/DOC, DSE DCP7310 controller, 208-600V.
Tier 4 Final3-phasecommercialsmall-commercial
Blue Star Power Systems
Blue Star JD80-03FT4MP
Open Basler controller + John Deere engine + Stamford alternator — trailer-mounted, no proprietary lock-in. Serviceable by any qualified tech.
80 kW standby · Diesel · Liquid-cooled
80 kW Tier 4 Final mobile diesel for construction, emergency response, and planned outage support where portability and clean emissions matter.
80 kW Tier 4 Final mobile trailer diesel generator built by Blue Star Power Systems. John Deere 4045HFG04 four-cylinder engine, Stamford UCI274C alternator, DSE DCP7310 controller, 250-gallon integrated fuel tank.
Tier 4 Final3-phaseconstructiontemporary-power
Kohler
Kohler 80REOZJ4
85 kW compact diesel standby -- John Deere 4045HFG04 turbo at 1800 RPM. Sub-3% THD with quiet enclosure options.
85 kW standby · Diesel · Liquid-cooled
85 kW commercial standby for small-to-mid commercial, retail, branch offices, and light industrial applications on diesel.
80 kW Tier 4 Final diesel commercial standby generator. John Deere-powered diesel with EPA Tier 4 Final emissions compliance for commercial and institutional applications.
Tier 4 Final3-phasecommercialhealthcare
Kohler
Kohler 90REOZT4
85 kW mobile diesel trailer -- Tier 4 John Deere 4045HFG04. DOT-towable for temporary and emergency power deployment.
85 kW standby · Diesel · Liquid-cooled
85 kW mobile standby for construction, planned utility outages, disaster response, and rental fleet applications.
90 kW Tier 4 Final diesel mobile trailer generator. John Deere-powered portable diesel for construction, events, and temporary power applications.
Tier 4 Final3-phasecommercialhealthcare
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