Specifications
| Fuel | Diesel |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 1280 kW |
| Standby kVA | 1600 |
| Prime power | 1160 kW |
| Emissions | Tier II |
| Controller | Decision-Maker 550 |
| Oil capacity | 200.0 L |
| Alternator | 7M4052 |
| Voltage options | 220/380 V, 240/416 V, 277/480 V, 347/600 V, 2400/4160 V |
| Phase | 3 |
| Power factor | 0.8 |
| Battery cranking | 1150 CCA |
| Battery voltage | 12 V |
| Battery quantity | 4 |
| Coolant capacity | 322 L |
| Max ambient | 45 °C |
| Dimensions (L×W×H) | 6353×2232×2566 mm |
| Dry weight | 12020 kg |
Engine
| Oil capacity | 150.0 L |
|---|---|
| Coolant capacity | 125.0 L |
| Displacement | 49.03 L |
| Aspiration | Turbo-Charged, After Cooler (Jacket water to Cooler) |
| Rated speed | 1800 rpm |
Maintenance & consumables
for the Mitsubishi S12R-Y1PTA-2| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | — | ||||
| Fuel filter | — | ||||
| Oil filter | — | ||||
| Battery | — | ||||
| Belt | — | ||||
| Coolant | — | ||||
| Coolant filter | — | ||||
| Oil | 150.0 gal | — | |||
| Spark plug | — |
Service specifications
30| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Other | 10 in. weld flange bolt circle diameter B | 361.95 | mm (14.25 in.) | |
| Other | 10 in. weld flange outside diameter C | 406.4 | mm (16.0 in.) | |
| Other | 10 in. weld flange quantity of bolts / bolt hole diameter D | 12, 25.40 | mm (1.00 in.) | |
| Other | 12 in. weld flange bolt circle diameter B | 431.80 | mm (17.00 in.) | |
| Other | 12 in. weld flange outside diameter C | 482.6 | mm (19.0 in.) | |
| Other | 12 in. weld flange quantity of bolts / bolt hole diameter D | 12, 25.40 | mm (1.00 in.) | |
| Other | 14 in. weld flange bolt circle diameter B | 476.25 | mm (18.75 in.) | |
| Other | 14 in. weld flange outside diameter C | 533.4 | mm (21.0 in.) | |
| Other | 14 in. weld flange quantity of bolts / bolt hole diameter D | 12, 28.58 | mm (1.13 in.) | |
| Other | 16 in. weld flange bolt circle diameter B | 539.75 | mm (21.25 in.) | |
| Other | 16 in. weld flange outside diameter C | 596.9 | mm (23.5 in.) | |
| Other | 16 in. weld flange quantity of bolts / bolt hole diameter D | 16, 28.58 | mm (1.13 in.) | |
| Other | 18 in. weld flange bolt circle diameter B | 577.85 | mm (22.75 in.) | |
| Other | 18 in. weld flange outside diameter C | 635.0 | mm (25.0 in.) | |
| Other | 18 in. weld flange quantity of bolts / bolt hole diameter D | 16, 31.75 | mm (1.25 in.) | |
| Other | 20 in. weld flange bolt circle diameter B | 635.00 | mm (25.00 in.) | |
| Other | 20 in. weld flange outside diameter C | 698.5 | mm (27.5 in.) | |
| Other | 20 in. weld flange quantity of bolts / bolt hole diameter D | 20, 31.75 | mm (1.25 in.) | |
| Other | 5 in. weld flange bolt circle diameter B | 215.90 | mm (8.50 in.) | |
| Other | 5 in. weld flange outside diameter C | 241.30 | mm (9.50 in.) | |
| Other | 5 in. weld flange quantity of bolts / bolt hole diameter D | 8, 22.23 | mm (0.88 in.) | |
| Other | 6 in. weld flange bolt circle diameter B | 254.0 | mm (10.0 in.) | |
| Other | 6 in. weld flange outside diameter C | 279.4 | mm (11.0 in.) | |
| Other | 6 in. weld flange quantity of bolts / bolt hole diameter D | 8, 22.23 | mm (0.88 in.) | |
| Other | 8 in. weld flange bolt circle diameter B | 298.45 | mm (11.75 in.) | |
| Other | 8 in. weld flange outside diameter C | 342.9 | mm (13.5 in.) | |
| Other | 8 in. weld flange quantity of bolts / bolt hole diameter D | 8, 22.23 | mm (0.88 in.) | |
| Other | Weld flange angle A (10, 12, 14 in. nominal pipe size) | 30 | deg. | |
| Other | Weld flange angle A (16, 18, 20 in. nominal pipe size) | 22.5 | deg. | |
| Other | Weld flange angle A (5, 6, 8 in. nominal pipe size) | 45 | deg. |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Common questions
What size generator is the Kohler 1250ROZMC?
The Kohler 1250ROZMC is rated 1280 kW standby (1600.0 kVA).
What engine is in the Kohler 1250ROZMC?
The Kohler 1250ROZMC is powered by the Mitsubishi S12R-Y1PTA-2 engine.
Is the Kohler 1250ROZMC diesel or gas?
The Kohler 1250ROZMC runs on Diesel.
How much oil does the Kohler 1250ROZMC take?
The Mitsubishi S12R-Y1PTA-2 engine in the Kohler 1250ROZMC has an oil capacity of 150.0 liters.
What alternator does the Kohler 1250ROZMC use?
The Kohler 1250ROZMC uses a 7M4052 alternator.
Parts
26model family| Part # | Description | Qty | System | |
|---|---|---|---|---|
| GM13942 | Oil Filter | 4 | Oil filter | Amazon $60.99 eBay $37.99 |
| GM13943 | Oil Filter (bypass) | 1 | Oil filter | Amazon eBay |
| GM13944 | Thermostat | 4 | Thermostat | eBay |
| GM13945 | Thermostat Gasket | 2 | Gasket | eBay |
| GM13946 | Tip assembly, nozzle | 12 | Injector | eBay $80.25 |
| GM13947 | Filter, fuel | 4 | Fuel filter | Amazon $30.01 eBay $79.99 |
| GM13948 | V-Belt (alternator) | 1 | Belt | Amazon eBay |
| GM13950 | Oil Filter (bypass) | 1 | Oil filter | Amazon $67.35 eBay $23.66 |
| GM13951 | Fuel Filter | 2 | Fuel filter | Amazon eBay |
| GM13952 | Fuel Filter | 4 | Fuel filter | Amazon eBay |
| GM13953 | Thermostat | 2 | Thermostat | Amazon eBay |
| GM14525 | V-Belt (set of 4) | 1 | Belt | Amazon eBay $94.95 |
| GM14526 | V-Belt (set of 4) | 1 | Belt | Amazon eBay $39.80 |
| GM15752 | V-Belt | 1 | Belt | Amazon eBay |
| GM15753 | V-Belt (alternator) | 1 | Belt | Amazon eBay |
| GM15765 | Thermostat Gasket | 1 | Gasket | eBay |
| GM21122 | V-Belt | 1 | Belt | Amazon eBay |
| GM21663 | Fuel Filter | 2 | Fuel filter | Amazon eBay |
| GM21727 | Thermostat Gasket | 2 | Gasket | eBay |
| GM21733 | Tip assembly, nozzle | 16 | Injector | Amazon eBay $176.95 |
| GM21917 | V-Belt (alternator) | 1 | Belt | Amazon eBay |
| GM31390 | Thermostat | 4 | Thermostat | eBay |
| GM31436 | Tip assembly, nozzle | 6 | Injector | eBay |
| GM32057 | Oil Filter | 4 | Oil filter | Amazon eBay $9.99 |
| GM35977 | Tip assembly, nozzle | 12 | Injector | eBay |
| GM38852 | Oil Filter | 2 | Oil filter | Amazon $79.89 eBay |
Compiled from this model's family documentation — may include parts for closely-related variants. Confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.
Fuel consumption
| Rating | Load | L/h | gal/h |
|---|---|---|---|
| Prime | 25% | 103.0 | 27.1 |
| Prime | 50% | 172.0 | 45.4 |
| Prime | 75% | 241.0 | 63.7 |
| Prime | 100% | 319.0 | 84.4 |
| Standby | 25% | 104.0 | 27.6 |
| Standby | 50% | 184.0 | 48.6 |
| Standby | 75% | 263.0 | 69.4 |
| Standby | 100% | 354.0 | 93.6 |
Available documents
Spec sheet — Kohler-1250ROZMC (Kohler)Spec sheet — adv8175 (Kohler)Reference — G6-39 0918AZ (Kohler)Service manual — tp6057 (Kohler)