Service parts for the 300REZX
Grouped by system, with how many of each the parts manual calls for.
Electrical
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
| Fuel | natural gas / LP |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 300 kW |
| Standby kVA | 375 |
| Prime power | 270 kW |
| Controller | APM402, APM603, Decision-Maker 550, Decision-Maker 6000 |
| Oil capacity | 42.1 L |
| Alternator | 4M4019, 4M4266 (4-pole, Class NEMA MG1 insulation) |
| Voltage options | 480 V |
| Phase | 3 |
| Rated current | 360 A |
| Power factor | 0.8 |
| Battery cranking | 925 CCA |
| Battery voltage | 12 V |
| Battery quantity | 2 |
| Coolant capacity | 163.0 L |
| Engine jacket water | 50.0 L |
| Max ambient | 50 °C |
| Dimensions (L×W×H) | 3745×1711×2464 mm |
| Dry weight | 3200 kg |
| Wet weight | 4490 kg |
| Sound level | 70.0 dBA @ 23 m |
Engine
| Oil capacity | 35.0 L |
|---|---|
| Coolant capacity | 42.0 L |
| Displacement | 18.273 L |
| Aspiration | Turbocharged, Charge Air-Cooled |
| Rated speed | 1800 rpm |
Maintenance & consumables
for the Power Solutions International D183L| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Dry | — | |||
| Fuel filter | N/A | — | |||
| Oil filter | ×2 | — | 93 hr | ||
| Battery | N/A | 324586 | Amazon eBay | ||
| Belt | N/A | — | 24 hr | ||
| Coolant | Water-Cooled | — | |||
| Oil | Full Pressure | — | |||
| Spark plug | N/A | — |
Service specifications
41| 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 | Frequency regulation, no-load to full-load | Isochronous | ||
| Other | Frequency regulation, steady state | ±0.5 | % | |
| 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. | |
| Pressure | Dual fuel engine, LPG vapor withdrawal fuel supply pressure | 1.24 | kPa | |
| Pressure | LPG vapor withdrawal fuel supply pressure | 1.24-2.74 | kPa | measured at the generator set fuel inlet |
| Pressure | Max. restriction of cooling air, intake and discharge side of radiator | 0.125 | kPa | |
| Pressure | Maximum allowable back pressure after catalyst | 5.1 | kPa | |
| Pressure | Maximum allowable back pressure overall | 10.2 | kPa | |
| Pressure | Natural gas fuel supply pressure | 1.74-2.74 | kPa | measured at the generator set fuel inlet downstream of any fuel system equipment accessories |
| Speed | Rated rpm | 1800 | rpm | |
| Temperature | Ambient temperature | 50 | C | weather and sound enclosures with internal silencer reduce ambient temperature capability by 5C (9F) |
| Temperature | Exhaust temperature at rated kW, dry exhaust | 600 | C | at rated kW |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Recommended fluids
| Fluid | Grade | Standard | Ambient | Capacity | Notes |
|---|---|---|---|---|---|
| Engine oil | Kohler Genuine oil | 42.1 L | Kohler recommends the use of Kohler Genuine oil and filters. | ||
| Fuel | LP Gas (Vapor) | Nominal fuel rating: LP vapor, 93 MJ/m3 (2500 Btu/ft.3); propane 85% min., lower heating value 84.2 MJ/m3 (2260 Btu/ft3) min. | |||
| Fuel | Natural Gas | Nominal fuel rating: Natural gas, 37 MJ/m3 (1000 Btu/ft.3); methane 90% min., lower heating value 33.2 MJ/m3 (890 Btu/ft3) min. |
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, Reconnectable | 12 | Alternator 4M4019, 12 lead | ||
| 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 | |
| 600 | 4, 600 V | 4 | Alternator 4M4266, 4 lead |
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
How many kW is the Kohler 300REZX?
The Kohler 300REZX is rated 300 kW standby (375.0 kVA).
Which engine powers the Kohler 300REZX?
The Kohler 300REZX is powered by the Power Solutions International D183L engine.
What fuel type does the Kohler 300REZX take?
The Kohler 300REZX runs on natural gas / LP.
What's the oil capacity on a Kohler 300REZX?
The Power Solutions International D183L engine in the Kohler 300REZX has an oil capacity of 35.0 liters.
What is the coolant capacity of the Kohler 300REZX?
The Kohler 300REZX cooling system holds 163 liters (43.1 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.
What is the continuous rating of the Kohler 300REZX?
The Kohler 300REZX is rated 270 kW prime (338 kVA), against 300 kW standby.
How loud is the Kohler 300REZX?
The Kohler 300REZX is rated at 70.0 dBA at 23 m, per the manufacturer specification sheet.
How much does the Kohler 300REZX weigh?
The Kohler 300REZX has a dry weight of 3200 kg (7054 lb).
What voltages is the Kohler 300REZX available in?
The Kohler 300REZX is offered in 480 V, 3-phase.
How many cold cranking amps does the Kohler 300REZX require?
The Kohler 300REZX uses 2 batteryies, 12 V each, 925 CCA, per the manufacturer specification sheet.
What alternator does the Kohler 300REZX use?
The Kohler 300REZX uses a 4M4019, 4M4266 alternator. It has 4 poles. Insulation class NEMA MG1.
Parts
6model family| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 300REZXD | 300 KW L.P./N.G. GENSET | 1 | Service part / kit | Amazon eBay |
| 350EOZCS | 350 KW DIESEL COMMERCIAL MARINE GENSET | 1 | Service part / kit | Amazon eBay |
| 350REZXD | 350 KW L.P./N.G. GENSET | 1 | Service part / kit | Amazon eBay |
| 400REOZJC | 400 KW DIESEL GENSET | 1 | Service part / kit | Amazon eBay $1799.95 |
| 500REOZJC | 500 KW DIESEL GENSET | 1 | Service part / kit | Amazon eBay $1799.95 |
| KG80R | 80 kW L.P./N.G. Genset | 1 | Service part / kit | Amazon 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 | 100% | 939.0 | 255.25 |
| Standby | 100% | 1041.0 | 270.27 |
Available documents
This page was generated from the 19 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.