Service parts for the 1250REOZDD
Grouped by system, with how many of each the parts manual calls for.
Fuel 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 | 1300 kW |
| Standby kVA | 1625 |
| Prime power | 1180 kW |
| Emissions | Tier 2 EPA-Certified for Stationary Emergency Applications |
| Controller | Decision-Maker 550, Decision-Maker 6000 |
| Oil capacity | 260.0 L |
| Alternator | 7M4048 |
| Voltage options | 220/380 V, 240/416 V, 277/480 V |
| Phase | 3 |
| Rated current | 1955 A |
| Power factor | 0.8 |
| Battery cranking | 1150 CCA |
| Battery voltage | 12 V |
| Battery quantity | 4 |
| Coolant capacity | 560 L |
| Max ambient | 40 °C |
| Dimensions (L×W×H) | 6104×2232×2538 mm |
Engine
| Oil capacity | 253.0 L |
|---|---|
| Coolant capacity | 570.0 L |
| Displacement | 57.2 L |
| Aspiration | Turbocharged, aftercooled |
| Rated speed | 1800 rpm |
Maintenance & consumables
for the MTU 12V 4000 G43| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Dry | — | |||
| Fuel filter | Secondary | ×1 | — | ||
| Fuel filter | Standard fuel filter | 33763 | Amazon $30.19 eBay $29.99 PartsGeek $29.97 | ||
| Oil filter | Spin-On | ×4 | — | ||
| Battery | Battery Box and Cables | — | |||
| Belt | Blower Fan and Fan Drive, Radiator - Unit Mounted, Electric Starting Motor - 24V, Jacket Water Pump, Inter Cooler Water Pump | — | |||
| Coolant | 583.0 L | — | |||
| Coolant filter | N/A | — | |||
| Oil | 260.0 L | — | |||
| 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 1250REOZDD?
The Kohler 1250REOZDD is rated 1300 kW standby (1625.0 kVA).
What engine is in the Kohler 1250REOZDD?
The Kohler 1250REOZDD is powered by the MTU 12V 4000 G43 engine.
What fuel does the Kohler 1250REOZDD use?
The Kohler 1250REOZDD runs on Diesel.
What is the oil capacity of the Kohler 1250REOZDD?
The MTU 12V 4000 G43 engine in the Kohler 1250REOZDD has an oil capacity of 253.0 liters.
What alternator does the Kohler 1250REOZDD use?
The Kohler 1250REOZDD uses a 7M4048 alternator.
What fuel filter does the Kohler 1250REOZDD use?
The Kohler 1250REOZDD uses fuel filter part number 33763.
Parts
16model family| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 279720 | Hose, hump | 4 | Hose | Amazon |
| 279736 | Element, primary | 2 | Air filter | Amazon eBay |
| 279737 | Element, secondary | 2 | Air filter | Amazon eBay |
| 279738 | Element, primary | 4 | Air filter | Amazon eBay KuduParts $248.00 |
| 279739 | Element, secondary | 4 | Air filter | Amazon FridayParts $165.75 |
| 347957 | Hose, 45 deg elbow, 8.00 in. ID | 1 | Hose | buy |
| GM23518 | Hose, hump, 8.00 in. ID | 1 | Hose | buy |
| GM23519 | Hose, 90 deg elbow, 8.00 in. ID | 1 | Hose | buy |
| GM24553 | Alternator Belt | Belt | Amazon eBay | |
| GM28302 | Hose, straight air, 8.00 in. ID | 1 | Hose | buy |
| GM30213 | Thermostat | Thermostat | eBay | |
| GM35390 | Seal | Seal | eBay $27.99 | |
| GM51785 | Alternator Belt | Belt | Amazon eBay | |
| GM64086 | Alternator Belt | Belt | Amazon eBay | |
| GM69997 | Element, Primary (Outer) | 1 | Air filter | Amazon eBay $108.80 |
| GM69998 | Element, Secondary (Inner) | 1 | Air filter | Amazon eBay $66.30 |
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% | 104.5 | 27.6 |
| Prime | 50% | 174.1 | 46.0 |
| Prime | 75% | 243.4 | 64.3 |
| Prime | 100% | 313.1 | 82.7 |
| Standby | 25% | 113.6 | 30.0 |
| Standby | 50% | 194.6 | 51.4 |
| Standby | 75% | 276.0 | 72.9 |
| Standby | 100% | 357.0 | 94.3 |
Available documents
Spec sheet — Kohler-1250REOZDD (Kohler)Reference — 1250-2000REOZM REOZD G6119 (Kohler)Reference — G6-39 0918AZ (Kohler)Parts manual — tp6217 (Kohler)