Specifications
| Fuel | Natural Gas |
|---|---|
| Frequency | 50.0 Hz |
| Standby power | 40 kW |
| Standby kVA | 50 |
| Prime power | 38 kW |
| Controller | Decision-Maker 550 |
| Oil capacity | 6.2 L |
Engine
| Oil capacity | 6.2 L |
|---|---|
| Coolant capacity | 20.8 L |
| Displacement | 5.0 L |
| Aspiration | Natural Aspiration |
| Rated speed | 1800 rpm |
Maintenance & consumables
for the General Motors Industrial Powertrain Vortec 5.0 L| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Oil filter | Cartridge | GM16703 | Amazon eBay $10.00 | ||
| Coolant | 20.8 L | — | |||
| Oil | 6.2 L | — | 150 hr |
Common questions
What is the power rating of the Kohler 50RZ?
The Kohler 50RZ is rated 40 kW standby (50.0 kVA).
What engine does the Kohler 50RZ use?
The Kohler 50RZ is powered by the General Motors Industrial Powertrain Vortec 5.0 L engine.
What fuel does the Kohler 50RZ use?
The Kohler 50RZ runs on Natural Gas.
What is the oil capacity of the Kohler 50RZ?
The General Motors Industrial Powertrain Vortec 5.0 L engine in the Kohler 50RZ has an oil capacity of 6.2 liters.
Parts
250model family| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 241481 | Switch, high temperature 268298 Sender, water temperature | Sensor | buy | |
| 241623 | Sensor, ferromagnetic | Sensor | buy | |
| 241927 | Speed sensor | Sensor | buy | |
| 247076 | Pump, fuel electric | Pump | buy | |
| 249887 | Clamp, hose | Hose | buy | |
| 249888 | Clamp, hose | Hose | buy | |
| 250081 | Clamp, hose | Hose | buy | |
| 253674 | Mount, air cleaner | Air filter | buy | |
| 255013 | Alternator | Alternator | buy | |
| 255264 | Switch, low water temperature | Fluid | buy | |
| 255414 | Bracket, fuel pump | Pump | buy | |
| 255513 | Air cleaner (includes element) | Air filter | buy | |
| 255515 | Duct, air | Hose | buy | |
| 255516 | Hose, hump | Hose | kuduparts $113.99 | |
| 255520 | Hose, reducer | Hose | buy | |
| 255531 | Hose, upper radiator (flexible) | Hose | buy | |
| 255532 | Hose, lower radiator | Hose | buy | |
| 255553 | Turbocharger | Turbocharger | buy | |
| 255554 | Turbocharger | Turbocharger | buy | |
| 255603 | Hose, lower radiator | Hose | buy | |
| 255625 | Hose, step | Hose | kuduparts $199.99 | |
| 255626 | Line, oil feed | Fluid | buy | |
| 255630 | Fitting, oil drain | Fluid | buy | |
| 255664 | Gasket | Gasket | kuduparts $295.99 | |
| 255665 | Air cleaner (includes item 3) | Air filter | buy | |
| 255674 | Fitting, oil drain | Fluid | kuduparts $203.99 | |
| 255739 | Element, air cleaner | Air filter | buy | |
| 255751 | Thermostat | Thermostat | buy | |
| 255752 | Gasket, thermostat | Gasket | buy | |
| 255755 | Support, fuel pipe | Fluid | buy | |
| 255879 | Decal, oil warning | Fluid | buy | |
| 255912 | Switch, oil pressure | Fluid | buy | |
| 256420 | Pulley, alternator | Alternator | buy | |
| 257070 | Bracket, sensor mounting | Sensor | buy | |
| 257168 | Tolerance Ring | 1 | Seal | buy |
| 257830 | Tolerance Ring | 1 | Seal | buy |
| 258423 | Element, air cleaner | 3 | Air filter | Amazon eBay $36.43 |
| 258448 | Element, air cleaner | 3 | Air filter | buy |
| 258450 | Pipe, turbo inlet | Turbocharger | buy | |
| 258456 | Support, turbocharger | Turbocharger | buy | |
| 258460 | Line, oil drain | Fluid | buy | |
| 258465 | Hose, step | Hose | buy | |
| 258794 | Cooler, oil (includes gasket) | Gasket | buy | |
| 258795 | Adaptor, oil cooler | Fluid | buy | |
| 258837 | Hose, upper radiator (molded) | Hose | buy | |
| 258895 | Gasket | Gasket | buy | |
| 258922 | Pipe, turbo inlet | Turbocharger | buy | |
| 258955 | Belt, V 42 in. | Belt | Amazon eBay $36.59 | |
| 258957 | Clamp, hose | Hose | buy | |
| 264390 | Sender, oil pressure | Fluid | buy | |
| 267548 | Block, oil gauge sender | Fluid | buy | |
| 273520 | Sensor, low coolant | Sensor | buy | |
| 276076 | Pulley, water pump | Pump | buy | |
| 276082 | Gasket | Gasket | buy | |
| 276085 | Cap, oil fill | Fluid | buy | |
| 276097 | Starter assembly | Starter | buy | |
| 276162 | Thermostat* | Thermostat | buy | |
| 276164 | Hose, crankcase vent | Hose | buy | |
| 276226 | Alternator | Alternator | buy | |
| 276488 | Hose, upper radiator | Hose | buy | |
| 276489 | Hose, lower radiator | Hose | buy | |
| 278850 | Insulator | 1 | Seal | buy |
| 279449 | Oil filter (supplied by Ford) | Oil filter | Amazon eBay $20.00 | |
| 279604 | Clamp, hose | Hose | buy | |
| 280494 | Gasket, carburetor | Gasket | buy | |
| 282897 | Gauge, oil pressure | Fluid | buy | |
| 291430 | Gasket, carburetor | Gasket | buy | |
| 291891 | Solenoid, starter | Starter | buy | |
| 324134 | Element, air cleaner | Air filter | Amazon eBay $140.00 | |
| 326098 | Element, air cleaner | 3 | Air filter | Amazon eBay $200.00 |
| 326118 | Guard, belt, right (not shown) | Belt | buy | |
| 326119 | Guard, belt, left (not shown) | Belt | buy | |
| 326130 | Support, turbocharger | Turbocharger | buy | |
| 326131 | Bracket, air cleaner | Air filter | buy | |
| 326136 | Starter assembly | Starter | buy | |
| 326165 | Gasket, carburetor | Gasket | buy | |
| 326246 | Guard, belt, bottom (not shown) | Belt | buy | |
| 326259 | Cap, oil fill | Fluid | buy | |
| 326296 | Hose, hump | Hose | buy | |
| 328309 | Switch assembly, pressure | Fluid | buy | |
| A-257180 | Alternator sub-assembly (includes items 41 and 47) | Alternator | buy | |
| A-257181 | Alternator sub-assembly (includes items 41 and 47) | Alternator | buy | |
| A-257319 | Alternator assembly (includes items 32-61) | Alternator | buy | |
| A-257323 | Alternator assembly (includes items 32-61) | Alternator | buy | |
| A-269441 | Air cleaner (includes items 3 and 4) | Air filter | buy | |
| A-324131 | Air cleaner (includes element) | Air filter | buy | |
| A-326096 | Air cleaner | Air filter | buy | |
| B-292902 | Insulated Circuit Board | 1 | Sensor | FridayParts $271.50 |
| X-294-1 | Oil line, vent | Fluid | buy | |
| X-312-34 | Hose, oil cooler | Hose | buy | |
| X-312-50 | Hose, oil cooler | Hose | buy | |
| X-386-69 | Fuel line, flexible | Fluid | buy | |
| X-391-1 | Connector, hose | Hose | buy | |
| X-426-1 | Clamp, hose 2 17/32-3 6/8 | Hose | buy | |
| X-426-10 | Clamp, hose | Hose | buy | |
| X-426-12 | Clamp, hose | Hose | buy | |
| X-426-14 | Clamp, hose | Hose | buy | |
| X-426-16 | Clamp, hose | Hose | buy | |
| X-426-2 | Clamp, hose | Hose | buy | |
| X-426-3 | Clamp, hose | Hose | buy | |
| X-426-4 | Clamp, hose 1.32 x 2.10 | Hose | buy | |
| X-426-6 | Clamp, hose | Hose | buy | |
| X-426-7 | Clamp, hose 4.875 x 6.625 | Hose | buy | |
| X-426-9 | Clamp, hose | Hose | buy | |
| X-504-18 | Fuel line, flexible | Fluid | buy | |
| X-504-20 | Fuel line, flexible | Fluid | buy | |
| X-577-24 | Hose, oil cooler | Hose | buy | |
| X-577-26 | Hose, oil cooler | Hose | buy | |
| X-582-1 | Connector, hose | Hose | buy | |
| X-582-2 | Connector, hose | Hose | buy | |
| X-582-9 | Connector, hose | Hose | buy | |
| X-6014-2 | Hose, upper radiator | Hose | buy | |
| X-6014-3 | Hose, lower radiator | Hose | buy | |
| X-6053-2 | Hose, step | Hose | buy | |
| 2225227 | Controller Ribbon Cable | 1 | Service part / kit | buy |
| 2225327 | Controller Ribbon Cable | 1 | Service part / kit | buy |
| 224358 | Cap, radiator (7 psi) | Service part / kit | buy | |
| 224365 | Cap, radiator (14 psi) | Service part / kit | buy | |
| 230578 | Screw, hex cap | Service part / kit | FridayParts $24.68 | |
| 241308 | Switch, high temperature | Service part / kit | buy | |
| 241736 | Relay | Service part / kit | buy | |
| 241737 | Relay | Service part / kit | buy | |
| 243321 | Washer, insulating | 28 | Service part / kit | buy |
| 244210 | Mount, vibration | Service part / kit | buy | |
| 244914 | Valve, gas | Service part / kit | buy | |
| 248362 | Relay | Service part / kit | buy | |
| 253668 | Cap, rain | Service part / kit | buy | |
| 253878 | Shroud, radiator | Service part / kit | buy | |
| 254457 | Nut, wing | 4 | Service part / kit | buy |
| 255286 | Shroud, radiator | Service part / kit | buy | |
| 255288 | Support, radiator (left) | Service part / kit | buy | |
| 255296 | Support, radiator (right) | Service part / kit | buy | |
| 255298 | Cover, radiator | Service part / kit | buy | |
| 255519 | Adapter, manifold | Service part / kit | buy | |
| 255528 | Support, radiator (left) | Service part / kit | kuduparts $192.99 | |
| 255529 | Support, radiator (right) | Service part / kit | buy | |
| 255540 | Shroud, radiator | Service part / kit | kuduparts $268.99 | |
| 255709 | Shroud, radiator | Service part / kit | buy | |
| 255710 | Shroud, radiator | Service part / kit | buy | |
| 255913 | Switch, pressure | Service part / kit | buy | |
| 257247 | Adapter, generator | Service part / kit | buy | |
| 257248 | Adapter, generator | Service part / kit | buy | |
| 257490 | Adapter, drive hub | 38 | Service part / kit | buy |
| 257491 | Adapter, drive hub | Service part / kit | buy | |
| 259391 | Relay | Service part / kit | buy | |
| 259821 | Switch, selector | Service part / kit | buy | |
| 269366 | Connector, plug | Service part / kit | buy | |
| 273404 | Switch assembly, level (includes 47, 48 and 49) | Service part / kit | buy | |
| 273736 | Screw, hex cap | Service part / kit | buy | |
| 273737 | Screw, hex cap | Service part / kit | buy | |
| 276075 | Pulley, crankshaft | Service part / kit | buy | |
| 276081 | Adapter | Service part / kit | buy | |
| 276096 | Screw, washer head | Service part / kit | buy | |
| 276115 | Valve, crankcase vent | Service part / kit | buy | |
| 276341 | Shroud, radiator | Service part / kit | buy | |
| 276465 | Adapter, generator | Service part / kit | buy | |
| 276496 | Support, radiator (left) | Service part / kit | buy | |
| 276497 | Support, radiator (right) | Service part / kit | buy | |
| 276498 | Guard, radiator | Service part / kit | buy | |
| 282972 | Relay, K1 | Service part / kit | buy | |
| 283375 | Switch, toggle | Service part / kit | buy | |
| 287524 | Switch, push button | Service part / kit | buy | |
| 287571 | Adapter, tab | Service part / kit | buy | |
| 287812 | Switch, toggle | Service part / kit | buy | |
| 2882622 | 6-Light Controller | 1 | Service part / kit | buy |
| 288827 | Clamp, muffler | Service part / kit | buy | |
| 290945 | Washer, hardened | Service part / kit | buy | |
| 291401 | Bracket, alternator mounting | Service part / kit | buy | |
| 291769 | Adapter, carburetor | Service part / kit | buy | |
| 324139 | Cap, rain | Service part / kit | buy | |
| 324155 | Mount, vibration (engine end) | Service part / kit | buy | |
| 324156 | Mount, vibration (generator end) | Service part / kit | buy | |
| 326057 | Adapter, generator | Service part / kit | buy | |
| 326076 | Cover, lower adapter | Service part / kit | buy | |
| 326156 | Mount, vibration | Service part / kit | buy | |
| 327102 | Adapter, carburetor | Service part / kit | dieselpartscenter $12.72 | |
| A-2225215 | Main Circuit Board | 1 | Service part / kit | buy |
| A-2225220 | Indicator Board | 1 | Service part / kit | buy |
| A-2225321 | Main Circuit Board | 1 | Service part / kit | buy |
| A-2225323 | Indicator Board | 1 | Service part / kit | buy |
| A-254469 | Valve, gas | Service part / kit | buy | |
| A-255605 | Radiator assembly (includes item 22) | Service part / kit | buy | |
| A-255658 | Circuit board, FR-II relay | Service part / kit | buy | |
| A-255763 | Radiator assembly | Service part / kit | buy | |
| A-255765 | Radiator assembly | Service part / kit | buy | |
| A-257516 | Rotor | 1 | Service part / kit | buy |
| A-257517 | Rotor | 1 | Service part / kit | buy |
| A-257518 | Rotor | 1 | Service part / kit | buy |
| A-257519 | Rotor | 1 | Service part / kit | buy |
| A-257520 | Rotor | 1 | Service part / kit | buy |
| A-258913 | Rotor | 1 | Service part / kit | buy |
| A-258975 | Rotor | 1 | Service part / kit | buy |
| A-258976 | Rotor | 1 | Service part / kit | buy |
| A-258977 | Rotor | 1 | Service part / kit | buy |
| A-258978 | Rotor | 1 | Service part / kit | buy |
| A-258979 | Rotor | 1 | Service part / kit | buy |
| A-258980 | Rotor | 1 | Service part / kit | buy |
| A-258981 | Rotor | 1 | Service part / kit | buy |
| A-276469 | Radiator assembly (includes item 22) | Service part / kit | buy | |
| A-276470 | Radiator assembly (includes item 22) | Service part / kit | buy | |
| A-276471 | Radiator assembly (includes item 22) | Service part / kit | buy | |
| B-282945 | Box assembly, relay control (see page 74) | Service part / kit | buy | |
| B-2842271 | 16-Light Controller | 1 | Service part / kit | buy |
| G-2882605 | 6-Light Controller | 1 | Service part / kit | buy |
| S-368 | Washer, plain | Service part / kit | buy | |
| X-101-22 | Stop Nut | 5 | Service part / kit | buy |
| X-101-23 | Nut, hex stop | Service part / kit | buy | |
| X-101-7 | Nut, lock | Service part / kit | buy | |
| X-101-9 | Nut, lock 10-24 | Service part / kit | buy | |
| X-117-5 | Screw, hex cap | Service part / kit | buy | |
| X-125-22 | Screw, hex cap | Service part / kit | buy | |
| X-125-23 | Screw, hex cap | Service part / kit | buy | |
| X-125-24 | Screw, hex cap | Service part / kit | buy | |
| X-125-3 | Screw, hex cap | Service part / kit | buy | |
| X-125-34 | Screw, hex cap | Service part / kit | buy | |
| X-125-38 | Screw, hex cap | Service part / kit | buy | |
| X-125-41 | Screw, hex cap | Service part / kit | buy | |
| X-125-5 | Screw, hex cap | Service part / kit | buy | |
| X-129-19 | Screw, hex cap | Service part / kit | buy | |
| X-179-8 | Screw, hex cap | Service part / kit | buy | |
| X-18-1 | Washer, lock | Service part / kit | buy | |
| X-18-2 | Washer, lock | Service part / kit | buy | |
| X-19-1 | Washer, lock | Service part / kit | buy | |
| X-20-1 | Washer, lock | Service part / kit | buy | |
| X-21-1 | Washer, lock | Service part / kit | buy | |
| X-22-1 | Washer, lock | Service part / kit | buy | |
| X-22-10 | Washer, lock | Service part / kit | buy | |
| X-22-11 | Washer, lock | Service part / kit | buy | |
| X-22-12 | Washer, shakeproof | Service part / kit | buy | |
| X-22-13 | Washer, shakeproof | Service part / kit | buy | |
| X-22-14 | Washer, lock | Service part / kit | buy | |
| X-22-15 | Washer, lock | Service part / kit | buy | |
| X-22-16 | Washer, shakeproof | Service part / kit | buy | |
| X-22-18 | Washer, shakeproof | Service part / kit | buy | |
| X-22-20 | Washer, shakeproof | Service part / kit | buy | |
| X-22-24 | Washer, shakeproof | Service part / kit | buy | |
| X-22-26 | Washer, lock | Service part / kit | buy | |
| X-22-44 | Washer, shakeproof | Service part / kit | buy | |
| X-22-45 | Washer, shakeproof | Service part / kit | buy | |
| X-22-5 | Washer, shakeproof | Service part / kit | buy | |
| X-22-7 | Washer, lock #8 | Service part / kit | buy | |
| X-22-9 | Washer, lock | 23 | Service part / kit | buy |
| X-23-1 | Washer, lock | Service part / kit | buy | |
| X-25-109 | Washer, plain | Service part / kit | buy | |
| X-25-115 | Washer, lock #10 | Service part / kit | buy | |
| X-25-134 | Washer, plain | Service part / kit | buy | |
| X-25-136 | Washer, plain | Service part / kit | buy | |
| X-25-137 | Washer, plain | Service part / kit | buy | |
| X-25-138 | Washer, plain | Service part / kit | buy | |
| X-25-141 | Washer, plain (not shown) | Service part / kit | buy |
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% | 255.0 | |
| Prime | 50% | 362.4 | |
| Prime | 75% | 470.0 | |
| Prime | 100% | 560.7 | |
| Standby | 25% | 266.2 | |
| Standby | 50% | 388.0 | |
| Standby | 75% | 506.9 | |
| Standby | 100% | 596.9 |
Available documents
BrochureSpec sheetReferenceParts manualService manualWiring diagram