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 | Fast-Response PMG (Class Class H insulation) |
| Voltage options | 480 V |
| Phase | 3-phase |
| Power factor | 0.8 |
| Battery cranking | 1150 CCA |
| Battery voltage | 12 V |
| Battery quantity | 4 |
| Coolant capacity | 322.0 L |
| Engine jacket water | 125.0 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 | — | 180 hr | |||
| Fuel filter | ×4 | — | 180 hr | ||
| Oil filter | ×4 | — | 180 hr | ||
| Battery | — | 180 hr | |||
| Belt | — | 180 hr | |||
| Coolant | — | ||||
| Coolant filter | — | ||||
| Oil | 150.0 gal | — | |||
| Spark plug | — | 180 hr |
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.
Voltage reconnection
| Voltage | Phase | Connection | Leads | Notes |
|---|---|---|---|---|
| 12-lead optional voltage connections | 12 | Alternator optional feature | ||
| 4-lead dedicated voltages | 4 | Alternator standard feature | ||
| 110/127/139/240/254/277 | single-phase | switchable | Towable generator model specifications; some models n/a | |
| 208/220/240/415/440/480 | 3-phase | reconnectable | Towable generator model specifications | |
| 208/220/240/415/440/480 | 3-phase | switchable | Towable generator model specifications |
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 is the coolant capacity of the Kohler 1250ROZMC?
The Kohler 1250ROZMC cooling system holds 322 liters (85.1 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.
What is the continuous rating of the Kohler 1250ROZMC?
The Kohler 1250ROZMC is rated 1160 kW prime (1450 kVA), against 1280 kW standby.
What is the dry weight of the Kohler 1250ROZMC?
The Kohler 1250ROZMC has a dry weight of 12020 kg (26499 lb).
What voltage does the Kohler 1250ROZMC produce?
The Kohler 1250ROZMC is offered in 480 V, 3-phase-phase.
What size battery does the Kohler 1250ROZMC need?
The Kohler 1250ROZMC uses 4 batteryies, 12 V each, 1150 CCA, per the manufacturer specification sheet.
What alternator does the Kohler 1250ROZMC use?
The Kohler 1250ROZMC uses a Fast-Response PMG alternator. Insulation class Class H.
Parts
26model family| Part # | Description | Qty | System | |
|---|---|---|---|---|
| GM13942 | Oil Filter | 4 | Oil filter | Amazon eBay $37.99 NAPA $27.83 |
| GM13943 | Oil Filter (bypass) | 1 | Oil filter | Amazon eBay $46.75 |
| 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 eBay $79.99 NAPA $16.98 |
| GM13948 | Belt | 1 | Belt | Amazon eBay |
| GM13950 | Oil Filter (bypass) | 1 | Oil filter | Amazon eBay $23.66 NAPA $41.20 |
| 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 eBay $53.27 NAPA $37.54 |
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
This page was generated from the 7 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.