Overview#
The Kohler 1600ROZMC is a 1560-kilowatt standby (1416 kW prime) diesel generator built around a Mitsubishi S16R-Y1PTA-4 (50 Hz) or S16R-Y1PTA-2 (60 Hz) — a 65.4 L, 16-cylinder V-configuration turbocharged diesel. The ROZMC designation indicates a non-EPA-certified, multi-speed variant available in both 50 Hz (1500 RPM) and 60 Hz (1800 RPM) configurations, designed for export and non-regulated applications.
The 1600ROZMC occupies the lower end of Kohler's megawatt-class industrial generator lineup. Typical applications include large industrial facilities, data center campuses, utilities, and infrastructure projects in regions outside US EPA jurisdiction where raw megawattage is required without stationary emergency certification requirements. The unit supports both standard 277/480V distribution and medium-voltage alternator options (4,160V), reducing step-up transformer requirements in medium-voltage distribution systems.
For US domestic deployments in non-regulated applications, or for export projects, the 1600ROZMC provides significant flexibility with both 50 Hz and 60 Hz rating tables and a wide range of alternator configurations including 7M4050, 7M4052, 7M4054, and medium-voltage variants.
Specifications#
| Spec | Value |
|---|---|
| Standby Power (60 Hz) | 1,600 kW (varies by alternator) |
| Standby Power (50 Hz) | 1,560 kW |
| Prime Power (50 Hz) | 1,416 kW |
| Voltage options | 277/480V, 4,160V, up to 13,800V |
| Frequency | 50 Hz (1500 RPM) or 60 Hz (1800 RPM) |
| Engine (50 Hz) | Mitsubishi S16R-Y1PTA-4 |
| Engine (60 Hz) | Mitsubishi S16R-Y1PTA-2 |
| Engine type | 4-cycle turbocharged |
| Cylinders | 16 V-configuration |
| Displacement | 65.4 L (3,989 cu. in.) |
| Compression ratio | 15.0:1 |
| Alternator | Kohler 7M4050 (standard) |
| Fuel | Diesel (#2 / HVO / RD) |
| Cooling | Liquid (radiator) |
| Fuel consumption (100% standby, 60 Hz) | 113.7 gph |
| Fuel consumption (75% standby, 60 Hz) | 84.9 gph |
| Overall dimensions | 268.4" x 87.9" x 101.2" |
Service & Maintenance#
| Service | Interval |
|---|---|
| Oil change | Every 500 hours or 12 months |
| Fuel filter replacement | Every 500 hours |
| Air filter replacement | Every 1,000 hours |
| Coolant flush | Every 6,000 hours or 5 years |
| Load bank test | Annually |
| Major overhaul | Every 20,000 hours |
The Mitsubishi S16R platform has an oil pan capacity of 200 L (211 qt) and an oil pan capacity with filter of 250 L (264 qt). It uses four cartridge oil filters and a water-cooled oil cooler. Jacket water capacity is 170 L (44.9 gal); the radiator system holds 367 L (96.9 gal) total. Four 1,150 CCA batteries power dual 24V starter motors.
Common Failure Modes#
Fuel injection pump and injector wear is the primary concern at high operating hours on the Mitsubishi S16R platform, typically around 10,000 hours. The V16 configuration requires 16-injector set replacements, making this a significant planned maintenance event. Symptoms include hard starting, black smoke, and uneven cylinder loading.
Turbocharger degradation manifests around 12,000 hours. The S16R uses multiple turbochargers; power loss, excessive exhaust smoke, and oil carryover are the primary indicators. Turbocharger inspection should be included in extended service intervals.
Cooling system maintenance (hoses, thermostat, water pump) is important given the 367 L coolant capacity and the dual cooling circuits required by the V16 platform. Coolant testing and hose inspections should be performed annually.
Starting battery condition — the 1600ROZMC uses four 1,150 CCA batteries in dual 24V configurations. Given the high compression and large displacement, battery condition directly impacts reliable starting.
Our service experience#
OnPoint Generators provides installation, maintenance, load bank testing, and emergency service for Kohler industrial generators throughout Northern California and the Central Valley. Units in the 1,500+ kW class require specialized service capabilities: medium-voltage switch gear expertise, large-capacity load banks (1 MW+), and multi-point fuel system management. We support Mitsubishi S16R-based installations with factory-trained technicians and have access to the Mitsubishi industrial parts supply chain.
FAQ#
Q: What engine powers the Kohler 1600ROZMC? A: The 50 Hz version uses a Mitsubishi S16R-Y1PTA-4, and the 60 Hz version uses an S16R-Y1PTA-2. Both are 65.4 L, 16-cylinder V-configuration turbocharged diesels. Refer to Kohler spec sheet G5-363 for complete engine specifications.
Q: Why does the 1600ROZMC run at 1500 RPM? A: In 50 Hz configuration the ROZMC runs at 1500 RPM, which is standard for 50 Hz applications worldwide (vs. 1800 RPM for 60 Hz). The ROZMC designation (vs. REOZMD) indicates a non-EPA-certified variant intended for export and non-regulated markets.
Q: What medium-voltage options are available? A: The 1600ROZMC supports 4,160V distribution through the 7M4368 and 7M4370 alternator options. This eliminates the need for a step-up transformer in medium-voltage distribution systems.
Q: Does OnPoint service the Kohler 1600ROZMC? A: Yes. OnPoint Generators provides maintenance, repair, and load bank testing for Kohler industrial diesel generators throughout Northern California, including the 1,560 kW class.
