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.
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.
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
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.
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 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.
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