The Kohler 200REOZJF is a 200-kilowatt diesel commercial standby generator built on John Deere's 6.8 L inline-6 platform. Per spec sheet G5-373, the unit pairs the 6068HFG85 (Tier 3, 1800 RPM) with a 4-pole brushless rotating-field alternator and a Kohler controller. Standard offerings are three-phase at 120/208 V or 277/480 V.
This is a common size point for hospitals, data centers, and campus power: large enough for many life-safety branch panels, compact enough for standard mechanical rooms or outdoor pads.
The 6068 family is one of the most widely deployed mid-size standby diesel engines in North America. Parts availability, documentation, and field knowledge are broad — which materially reduces parts lead time on unplanned repairs.
The 200REOZJF is one of the most common commercial diesel platforms in our fleet. John Deere 6068 parts are readily available. The most frequent issue we see is fuel degradation from low runtime, which we mitigate via semi-annual fuel sampling.
Engineering specifications
Physical
Length
162 in
Width
53 in
Height
106 in
Wet weight
8,000 lb
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Configure your Kohler 200REOZJF
Lock the enclosure, fuel system, transfer switch, and add-ons — we'll confirm pricing, availability, and lead time within one business day. Prefer a free-form quote? That option is still here.
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
18.5 hours(0.8 days)
Fuel consumption ≈ 10.80 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 200REOZJF under standby duty. Field intervals may differ based on load profile, ambient conditions, and fuel quality.
Oil & filter
Every 500 hours or 12 months
Fuel filter
Every 500 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 (algae/water)
Clogged filters, injector fouling
—
moderate
Starting batteries (24V system)
Slow crank, failed start
—
minor
Turbocharger
Reduced power, oil in intake
—
moderate
Coolant heater (block heater)
Cold starts, slow to reach operating temp
—
minor
Parts cross-reference
starting Battery
Group 31 x2 (series 24V)
Frequently Asked Questions
What engine is in the Kohler 200REOZJF?
Per spec sheet G5-373, the 200REOZJF uses a John Deere 6068HFG85 — a 6.8 L turbocharged charge-air-cooled inline-6 PowerTech diesel at 1800 RPM, EPA Tier 3 (stationary emergency).
What voltages and phase configurations are available?
The published configurations are three-phase 120/208 V or 277/480 V at 0.8 PF. Higher-voltage three-phase configurations (e.g., 600 V) and other reconnections are available per the spec sheet.
Does a 200 kW generator need a block heater?
Standby diesel units use a coolant (block) heater to maintain block temperature so the unit can meet NFPA 110's 10-second start requirement. It's a standard feature on the 200REOZJF when configured for emergency standby duty.
