Overview#
The Kohler 1750REOZMD is a 1,780-kilowatt standby (1,650 kW prime) diesel generator powered by a Mitsubishi S16R-Y2PTAW2-1 — a 65.4 L, 16-cylinder V-configuration turbocharged diesel at 1800 RPM. As an EPA Tier 2 certified unit for stationary emergency applications, the 1750REOZMD is the US-domestic counterpart to the non-certified ROZMC variants, designed for mission-critical standby at data centers, hospitals, and large commercial facilities.
The REOZMD designation indicates the 1800 RPM (60 Hz) EPA-certified configuration. This unit supports both low-voltage (277/480V) and medium-voltage alternator options (4,160V; 12,470V; 13,200V; 13,800V), enabling direct integration into medium-voltage distribution systems without step-up transformers. The UL 2200 listing and NFPA 110 Level 1 capability make it suitable for the most demanding regulatory environments.
The 1750REOZMD's Mitsubishi S16R-Y2PTAW2-1 engine produces up to 2,180 kWm (2,923 BHP) maximum power, providing substantial derating headroom above the 1,780 kW standby rating. Available in high-ambient radiator configurations (rated to 50°C / 122°F), the unit operates in demanding climates without power derating.
Specifications#
| Spec | Value |
|---|---|
| Standby Power | 1,780 kW |
| Prime Power | 1,650 kW |
| Voltage options | 277/480V, 4,160V, 12,470V, 13,200V, 13,800V |
| Frequency | 60 Hz |
| Engine | Mitsubishi S16R-Y2PTAW2-1 |
| Engine type | 4-cycle turbocharged |
| Cylinders | 16 V-configuration |
| Displacement | 65.4 L (3,989 cu. in.) |
| Compression ratio | 14.0:1 |
| Rated RPM | 1,800 |
| Alternator | Kohler 7M4052 |
| Fuel | Diesel (#2 / HVO / RD) |
| Cooling | Liquid (radiator) |
| Emissions tier | EPA Tier 2 stationary emergency |
| Fuel consumption (100% standby load) | 141.6 gph |
| Fuel consumption (75% standby load) | 106.6 gph |
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 (NFPA 110 requirement) |
| Major overhaul | Every 20,000 hours |
The Mitsubishi S16R-Y2PTAW2-1 uses four secondary cartridge oil filters. Oil pan capacity is 200 L (211 qt) dry, 230 L (243 qt) with filter change. Jacket water capacity is 170 L (44.9 gal); total radiator system capacity is 367 L (96.9 gal). Four 1,150 CCA batteries power dual 24V starter motors (dual 24V configuration).
Common Failure Modes#
Fuel injection pump and injector wear is the primary concern at high service hours on the Mitsubishi S16R platform, typically around 10,000 hours. The V16 cylinder arrangement requires attention to individual injector balance to prevent uneven cylinder loading; symptoms include hard starting and visible black smoke.
Turbocharger degradation manifests around 12,000 hours. The 1750REOZMD dissipates significant heat (162 kW to ambient from the engine alone); turbocharger oil supply lines and bearing clearances should be inspected at extended service intervals.
Cooling system components — hoses, thermostat, and water pump — are subject to wear given the 367 L system capacity and dual-circuit cooling (engine jacket water plus charge intercooler circuit). Annual hose inspection and coolant testing are required for NFPA 110 compliance.
Starting battery condition is critical on large displacement V16 engines. The four-battery configuration maintains adequate cranking current, but individual battery health testing at each annual inspection prevents surprise failures during exercise tests.
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. The 1750REOZMD is one of the largest generators we service in the Bay Area's hospital and data center corridor. Accounts in this power class require 1 MW+ load banks for full-rated testing and certified medium-voltage technicians for switchgear work. We maintain OEM relationships with both Kohler/Rehlko and Mitsubishi's industrial engine division to support these installations.
FAQ#
Q: What engine powers the Kohler 1750REOZMD? A: The 1750REOZMD uses a Mitsubishi S16R-Y2PTAW2-1 — a 65.4 L, 16-cylinder V-configuration turbocharged diesel at 1800 RPM, EPA Tier 2 certified for stationary emergency standby.
Q: What is the standby power rating of the 1750REOZMD? A: 1,780 kW standby and 1,650 kW prime at 0.8 power factor per Kohler spec sheet G5-368.
Q: What medium-voltage options are available? A: The 1750REOZMD supports 4,160V, 12,470V, 13,200V, and 13,800V medium-voltage outputs through the 7M4370 and 7M4374 alternator options, enabling direct connection to medium-voltage distribution buses.
Q: Does OnPoint service the Kohler 1750REOZMD? A: Yes. OnPoint Generators provides maintenance, repair, and full-load bank testing for Kohler REOZMD diesel generators throughout Northern California, including the 1,780 kW class.
