The Kohler 1250REOZMD is a 1280-kilowatt standby (1160 kW prime) diesel generator powered by a Mitsubishi engine at 1800 RPM. This industrial-class unit serves mission-critical standby applications including data centers, hospitals, and large commercial facilities.
OnPoint Generators services Kohler REOZ diesel generators throughout Northern California. Units in this class require specialized service capabilities including medium-voltage expertise and large-capacity load bank testing.
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
2.5 hours(0.1 days)
Fuel consumption ≈ 79.77 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 1250REOZMD under standby duty. Field intervals may differ based on load profile, ambient conditions, and fuel quality.
Oil & filter
Every 500 hours or 12 months
Coolant change
Every 6000 hours
Air filter
Every 1000 hours
Fuel filter
Every 500 hours
Major overhaul
≈ 20,000 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 injection pump / injectors
Hard starting, black smoke, uneven cylinder loading
10,000+
moderate
Turbocharger
Power loss, excessive exhaust smoke, oil carryover
12,000+
moderate
Cooling system (hoses / thermostat)
Overtemperature fault, coolant loss
10,000+
minor
Battery (starting)
Slow crank, failed exercise
8,760+
minor
Frequently Asked Questions
What engine powers the Kohler 1250REOZMD?
The 1250REOZMD uses a Mitsubishi diesel engine running at 1800 RPM (model S12R-Y2PTAW-1).
What is the standby power rating of the 1250REOZMD?
The 1250REOZMD is rated at 1280 kW standby and 1160 kW prime per Kohler published specifications.
Does OnPoint service the Kohler 1250REOZMD?
Yes. OnPoint Generators provides maintenance, repair, and load bank testing for Kohler REOZ diesel generators throughout Northern California, including the 1280 kW class.
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