Service parts for the 1250REOZM
Grouped by system, with how many of each the parts manual calls for.
Fuel system
1 requiredOil system
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
| Fuel | diesel |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 1280 kW |
| Standby kVA | 1600 |
| Prime power | 1160 kW |
| Emissions | Tier 2 |
| Controller | Decision-Maker 550, Decision-Maker 6000 |
| Oil capacity | 180.0 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 | 327.0 L |
| Engine jacket water | 130.0 L |
| Max ambient | 40 °C |
| Dimensions (L×W×H) | 6353×2232×2490 mm |
Engine
| Oil capacity | 150.0 L |
|---|---|
| Coolant capacity | 130.0 L |
| Displacement | 49.0 L |
| Aspiration | Turbocharged |
| Rated speed | 1800 rpm |
Same engine, other brands
2 brandsThe Mitsubishi S12R-Y2PTAW-1 in this set also powers 2 generator sets sold under 2 other brands. Service parts and maintenance intervals for the engine are shared; enclosure, alternator, controller and ratings are not.
| Brand | Models |
|---|---|
| Generac | IDLC1250 |
| Igsa | GSMI21250L-UL |
Maintenance & consumables
for the Mitsubishi S12R-Y2PTAW-1| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Dry | — | 180 hr | ||
| Fuel filter | Secondary | GM13947 | Amazon eBay $79.99 NAPA $16.98 | ||
| Oil filter | GM38852 | Amazon eBay $53.27 NAPA $37.54 | |||
| Battery | Four, 1150 | — | 180 hr | ||
| Belt | Flexible Disc | — | 180 hr | ||
| Spark plug | N/A | — | 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 is the power rating of the Kohler 1250REOZM?
The Kohler 1250REOZM is rated 1280 kW standby (1600.0 kVA).
What engine does the Kohler 1250REOZM use?
The Kohler 1250REOZM is powered by the Mitsubishi S12R-Y2PTAW-1 engine.
What kind of fuel does the Kohler 1250REOZM run on?
The Kohler 1250REOZM runs on diesel.
What's the oil capacity on a Kohler 1250REOZM?
The Mitsubishi S12R-Y2PTAW-1 engine in the Kohler 1250REOZM has an oil capacity of 150.0 liters.
How much coolant does the Kohler 1250REOZM hold?
The Kohler 1250REOZM cooling system holds 327 liters (86.4 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.
What is the continuous rating of the Kohler 1250REOZM?
The Kohler 1250REOZM is rated 1160 kW prime (1450 kVA), against 1280 kW standby.
What voltage does the Kohler 1250REOZM produce?
The Kohler 1250REOZM is offered in 480 V, 3-phase-phase.
How many cold cranking amps does the Kohler 1250REOZM require?
The Kohler 1250REOZM uses 4 batteryies, 12 V each, 1150 CCA, per the manufacturer specification sheet.
What alternator comes on the Kohler 1250REOZM?
The Kohler 1250REOZM uses a Fast-Response PMG alternator. Insulation class Class H.
Which oil filter part number does the Kohler 1250REOZM take?
The Kohler 1250REOZM uses oil filter part number GM38852.
Which fuel filter part number does the Kohler 1250REOZM take?
The Kohler 1250REOZM uses fuel filter part number GM13947.
Parts
58model family| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 361240 | Replacement Block Heater | Replacement block heater | buy | |
| 361246 | Replacement Block Heater | Replacement block heater | buy | |
| 361248 | Replacement Block Heater | Replacement block heater | buy | |
| 361249 | Replacement Block Heater | Replacement block heater | buy | |
| 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 |
| GM19501 | Gasket | 4 | Gasket | buy |
| GM19667 | Complete Heater Assembly | Complete heater assembly | buy | |
| GM19668 | Complete Heater Assembly | Complete heater assembly | buy | |
| GM19669 | Complete Heater Assembly | Complete heater assembly | buy | |
| 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 |
| GM29474 | *Thermostat | 1 | Thermostat | buy |
| 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 |
| GM74090 | Block Heater Control Box | Block heater control box | buy | |
| GM74091 | Block Heater Control Box | Block heater control box | buy | |
| GM74092 | Block Heater Control Box | Block heater control box | buy | |
| GM74093 | Block Heater Control Box | Block heater control box | buy | |
| GM74094 | Block Heater Control Box | Block heater control box | buy | |
| GM74095 | Block Heater Control Box | Block heater control box | buy | |
| GM76115 | Block Heater Control Box | Block heater control box | buy | |
| GM76116 | Block Heater Control Box | Block heater control box | buy | |
| GM79182 | Block Heater Control Box | Block heater control box | buy | |
| GM79183 | Block Heater Control Box | Block heater control box | buy | |
| GM79184 | Block Heater Control Box | Block heater control box | buy | |
| GM29477 | Block Heater Service Element 120V/2500W | 1 | Service part / kit | eBay $99.99 |
| GM29478 | *Thermostat | 1 | Service part / kit | eBay |
| GM64645 | Exhaust fan | 1 | Service part / kit | buy |
| GM64647 | Enclosure heater, 1-phase, 208 V | 1 | Service part / kit | buy |
| GM64648 | Enclosure heater, 1-phase, 240 V | 1 | Service part / kit | buy |
| GM64649 | Enclosure heater, 3-phase, 208 V | 1 | Service part / kit | buy |
| GM64650 | Enclosure heater, 3-phase, 240 V | 1 | Service part / kit | buy |
| GM65322 | Handle, door | 1 | Service part / kit | buy |
| GM65323 | Support, heavy-duty | 1 | Service part / kit | buy |
| GM65325 | Door, latched | 1 | Service part / kit | buy |
| GM76113 | Heater, Block | 1 | Service part / kit | eBay |
| GM76114 | Heater, Block | 1 | Service part / kit | 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% | 105.0 | 27.6 |
| Prime | 50% | 176.0 | 46.4 |
| Prime | 75% | 259.0 | 68.4 |
| Prime | 100% | 344.0 | 90.9 |
| Standby | 25% | 110.0 | 29.2 |
| Standby | 50% | 193.0 | 51.0 |
| Standby | 75% | 284.0 | 75.1 |
| Standby | 100% | 392.0 | 103.4 |
Available documents
This page was generated from the 9 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.