Kohler · REOZ Series (Diesel Commercial Standby)
300 kW standby · Diesel · Liquid-cooled
300 kW diesel commercial standby generator powered by John Deere. Mid-range diesel workhorse for commercial, healthcare, and institutional applications.
The Kohler 300REOZJ is a 300-kilowatt diesel generator powered by a John Deere engine at 1800 RPM. Typical applications include commercial buildings, healthcare facilities, and institutional campuses.
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.
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Adjust load percent and tank size to estimate runtime. Pre-filled with this model's spec where available.
Estimated runtime
11.7 hours(0.5 days)
Fuel consumption ≈ 17.13 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.
Manufacturer-recommended intervals for the Kohler 300REOZJ under standby duty. Field intervals may differ based on load profile, ambient conditions, and fuel quality.
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 |
Kohler's diesel commercial standby series — 10 to 510 kW, John Deere and Kohler engines, built for life-safety loads.
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We service every major OEM and stock genuine parts for the most common models.