Kohler · REOZ Series (Diesel Commercial Standby)

Kohler 80REOZJF

80 kW standby / 72 kW prime · Diesel · Liquid-cooled

80 kW diesel commercial standby generator. John Deere-powered diesel for commercial, healthcare, education, and government standby applications.

Kohler Kohler 80REOZJF generator — specifications and details
Standby power
80 kW / 72 kW prime
Voltage options
120/208V, 277/480V, 120/240V
Frequency / Phase
60 Hz · 1/3-phase
Engine
John Deere 4045HF285H · 4.5L
EPA / Emissions
Tier 3
CommercialHealthcareGovernment
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Overview#

The Kohler 80REOZJF is an 80-kilowatt diesel commercial standby generator powered by a John Deere engine at 1800 RPM. It is the entry point to the REOZJ series, which uses John Deere engines for the 80 kW and above range. The unit features a brushless rare-earth permanent-magnet alternator with Fast-Response excitation, sustained short-circuit capability up to 300% of rated current for 10 seconds, and is available with sound-attenuated aluminum enclosures rated for 186 mph wind loads.

Our service experience#

OnPoint services John Deere-powered Kohler diesel generators across Northern California. The 80REOZJF shares the same platform and John Deere engine family as the 100REOZJF, giving us strong parts commonality and technician expertise across the REOZJ lineup.

Engineering specifications

Physical

Length
91.89 in
Width
34.02 in
Height
47.7 in
Wet weight
2,328 lb

Fuel system & runtime

Fuel use @ full load
6.9 GPH
Fuel use @ 75% load
5.6 GPH

Photos

Kohler 80REOZJF — product photo

Documents & downloads

Spec sheets & manuals

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Estimate runtime for the Kohler 80REOZJF

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

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Estimated runtime

37.6 hours(1.6 days)

Fuel consumption ≈ 5.32 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 80REOZJF 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.

ComponentSymptomTypical hoursSeverity
Fuel quality / degradationInjector fouling, hard starting, filter clogging4,380+moderate
TurbochargerPower loss, excessive smoke under load12,000+moderate
Battery (starting)Failed to start, slow crank8,760+minor

Frequently Asked Questions

What engine is in the Kohler 80REOZJF?
The 80REOZJF uses a John Deere diesel engine, turbocharged and aftercooled, rated at 1800 RPM, EPA certified for stationary emergency standby use.
Is the 80REOZJF EPA Tier 4?
No. The standard 80REOZJF is Tier 3, which is the regulatory tier applicable to stationary emergency standby diesel. For Tier 4 Final compliance, the 80REOZJ4 variant is available.
What enclosure options are available?
The 80REOZJF is available with sound-attenuated aluminum enclosures rated for 186 mph wind loads, as well as weather-protective and sound-attenuated steel options.

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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