What engine powers the Kohler 275REOZJE?

The 275REOZJE uses a John Deere diesel engine running at 1800 RPM (model 6090HF484A).

What is the standby power rating of the 275REOZJE?

The 275REOZJE is rated at 280 kW standby and 255 kW prime per Kohler published specifications.

Does OnPoint service the Kohler 275REOZJE?

Yes. OnPoint Generators provides maintenance, repair, and load bank testing for Kohler REOZ diesel generators throughout Northern California, including the 280 kW class.

Kohler · REOZ Series (Diesel Commercial Standby)

Kohler 275REOZJE

280 kW standby / 255 kW prime · Diesel · Liquid-cooled

280 kW diesel commercial standby generator powered by John Deere. Mid-range diesel workhorse for commercial, healthcare, and institutional applications.

Standby power: 280 kW / 255 kW prime
Voltage options: 277/480V, 120/208V, 120/240V
Frequency / Phase: 60 Hz · 1/3-phase
Engine: John Deere 6090HF484A · 9L
EPA / Emissions: Tier 3
Alternator: Kohler 4UA10

Commercial Healthcare Data Centersindustrial-lightGovernment

Overview#

The Kohler 275REOZJE is a 280-kilowatt standby (255 kW prime) diesel generator powered by a John Deere engine at 1800 RPM. Typical applications include commercial buildings, healthcare facilities, and institutional campuses.

Our service experience#

OnPoint Generators services Kohler REOZ diesel generators throughout Northern California. We typically structure accounts for mid-range diesel units around annual NFPA 110 service plus semi-annual fuel and filter inspections.

Engineering specifications

Physical

Length: 118.1 in
Width: 51.2 in
Height: 74.4 in
Wet weight: 5,400 lb

Fuel system & runtime

Fuel use @ full load: 19.6 GPH
Fuel use @ 75% load: 15 GPH

Photos

Documents & downloads

Spec sheets & manuals

Spec sheet (datasheet)

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Estimate runtime for the Kohler 275REOZJE

Adjust load percent and tank size to estimate runtime. Pre-filled with this model's spec where available.

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Fuel tank capacity

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Load

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GPH

Estimated runtime

13.2 hours(0.6 days)

Fuel consumption ≈ 15.12 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 Kohler 275REOZJE under standby duty. Field intervals may differ based on load profile, ambient conditions, and fuel quality.

Oil & filter: Every 250 hours or 12 months
Coolant change: Every 3000 hours
Air filter: Every 500 hours
Fuel filter: Every 500 hours
Major overhaul: ≈ 15,000 hours
Load bank test: Every 12 months

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 quality / degradation	Injector fouling, hard starting, filter clogging	4,380+	moderate
Turbocharger	Power loss, excessive smoke under load	12,000+	moderate
Battery (starting)	Failed to start, slow crank	8,760+	minor

Frequently Asked Questions

What engine powers the Kohler 275REOZJE?: The 275REOZJE uses a John Deere diesel engine running at 1800 RPM (model 6090HF484A).
What is the standby power rating of the 275REOZJE?: The 275REOZJE is rated at 280 kW standby and 255 kW prime per Kohler published specifications.
Does OnPoint service the Kohler 275REOZJE?: Yes. OnPoint Generators provides maintenance, repair, and load bank testing for Kohler REOZ diesel generators throughout Northern California, including the 280 kW class.

Compatible equipment

Transfer switches

More in the REOZ Series (Diesel Commercial Standby)

Kohler's diesel commercial standby series — 10 to 510 kW, John Deere and Kohler engines, built for life-safety loads.

View all 33models in this series →

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