Specifications
| Fuel | Diesel |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 42 kW |
| Standby kVA | 52 |
| Prime power | 37 kW |
| Emissions | Tier 3 |
| Controller | Decision-Maker 3000 |
| Oil capacity | 15.6 L |
| Voltage options | 120/208 V, 127/220 V, 120/240 V, 139/240 V, 220/380 V, 277/480 V, 347/600 V |
| Battery cranking | 650 CCA |
| Battery voltage | 12 V |
| Battery quantity | 1 |
| Coolant capacity | 12.3 L |
| Max ambient | 50 °C |
| Dimensions (L×W×H) | 2300×1040×1131 mm |
| Dry weight | 787 kg |
Engine
| Oil capacity | 15.6 L |
|---|---|
| Coolant capacity | 4.5 L |
| Displacement | 3.359 L |
| Aspiration | Turbo |
| Rated speed | 1500 rpm |
Maintenance & consumables
for the Kohler KDI 3404TM| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | cartridge replacement | — | 5000 hr | ||
| Fuel filter | Control water filter cartridge | — | 250 hr | ||
| Oil filter | cartridge replacement | ×1 | — | 250 hr | |
| Battery | One, 650 CCA | — | |||
| Belt | Check Poly-V alternator | — | 1500 hr | ||
| Coolant | check level | — | 1000 hr | ||
| Oil | check level | 15.6 | — | 250 hr | |
| 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 40REOZK?
The Kohler 40REOZK is rated 42 kW standby (52.0 kVA).
Which engine powers the Kohler 40REOZK?
The Kohler 40REOZK is powered by the Kohler KDI 3404TM engine.
Is the Kohler 40REOZK diesel or gas?
The Kohler 40REOZK runs on Diesel.
What is the oil capacity of the Kohler 40REOZK?
The Kohler KDI 3404TM engine in the Kohler 40REOZK has an oil capacity of 15.6 liters.
Parts
5| Part # | Description | Qty | System | |
|---|---|---|---|---|
| F-44 | kerosene, NATO designation | Fuel | Amazon eBay | |
| F-63 | kerosene, NATO designation, equivalent to F-34/F-35 with additives | Fuel | Amazon eBay | |
| ED0010101730-S | Camshaft | Service part / kit | Amazon eBay | |
| ED0010101820-S | Camshaft | Service part / kit | Amazon eBay $1282.30 | |
| ED0014603650-S | Six Nicks SN8 | Service part / kit | Amazon eBay $58.64 |
Service, wear & replacement parts referenced for this model and its engine — 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% | 4.9 | 1.3 |
| Prime | 50% | 7.6 | 2.0 |
| Prime | 75% | 10.6 | 2.8 |
| Prime | 100% | 13.2 | 3.5 |
| Standby | 25% | 4.9 | 1.3 |
| Standby | 50% | 9.1 | 2.4 |
| Standby | 75% | 11.7 | 3.1 |
| Standby | 100% | 14.0 | 3.7 |
Available documents
Spec sheet (Kohler)Spec sheet — G5-437 1018G (Kohler)Spec sheet — g5437 (Kohler)Reference (Kohler)Reference — 15-60REOZK G6141 (Kohler)Reference — G6-39 0918AZ (Kohler)Service manual — tp6924 (Kohler)