The Cummins/Onan QSK78-G15 is an engine rated at 1500 rpm, producing up to 3866 kW. It powers generator sets from Cummins/Onan, including the C3750D5.
Part of the Cummins/Onan QSK78 engine family — 7 variants share parts & fitment.
| Rated speed | 1500 rpm |
|---|---|
| Gross power | 3866 kW |
| Part # | Description | Category |
|---|---|---|
| A041Y824 | Band, Air Filter | air_filter |
| A049E248 | Shim (Used with W or X Alternator Cores with Double Stacked Bus Bar) | alternator |
| A042W539 | Belt, Drive | belt |
| A044B661 | Tensioner, Belt | belt |
| A044B953 | Belt, Drive | belt |
| A044B960 | Plate, Belt Guard | belt |
| A044B966 | Panel, Belt Guard | belt |
| A044B967 | Panel, Belt Guard | belt |
| A044B969 | Panel, Belt Guard | belt |
| 0526-0399-64 | Bracket, Fuel Filter | fuel_filter |
| 0821-6003-03 | Bracket, Fuel Filter | fuel_filter |
| A062Y338 | Filter, Fuel | fuel_filter |
| A062Y382 | Bracket, Fuel Filter | fuel_filter |
| 0130-5899 | Gasket, Radiator Outlet | gasket |
| 0130-5900 | Gasket, Radiator Outlet | gasket |
| 0130-6522 | Gasket | gasket |
| 0149-2881 | Gasket, Fuel Pump | gasket |
| A034M582 | Gasket, Radiator | gasket |
| A044B735 | Gasket, Radiator | gasket |
| A044B737 | Gasket | gasket |
| 0128-0108 | Insulation, Hose | hose |
| 0503-1708 | Hose, Radiator | hose |
| 0503-1726 | Hose, Radiator - With Flanges | hose |
| 0503-1872-04 | Clamp, Hose | hose |
| 0503-1872-05 | Clamp, Hose Without Flanges | hose |
| 0503-1872-09 | Clamp, Hose - With Flanges | hose |
| 0503-1872-14 | Clamp, Hose | hose |
| 0503-2826 | Hose, Fuel | hose |
| 0503-2827 | Hose, Fuel | hose |
| 501-0744-06 | Hose, Coolant | hose |
| 502-0827 | Hose, Barb (1/2 x 3/4) | hose |
| 502-1030 | Connector, Hose - 90° | hose |
| 502-1704 | Connector, Hose (Beaded) | hose |
| 503-2157-02 | Clamp, Hose | hose |
| 503-2826 | Hose, Fuel | hose |
| 503-2827 | Hose, Fuel | hose |
| 503-3062-01 | Hose, Silicon - Rubber | hose |
| A029G973 | Hose, Air | hose |
| A029G977 | Hose, Air | hose |
| A029J872 | Clamp, Hose | hose |
| A029Y826 | Hose (Silicone Rubber) (1.00 I.D. x 1.38 O.D.) | hose |
| A029Y828 | Clamp, Hose (1.00”) | hose |
| A034F806 | Hose, Flexible | hose |
| A034M571 | Hose, Radiator | hose |
| A034M586 | Coupling, Hose | hose |
| A034M587 | Coupling, Hose | hose |
| A034M588 | Coupling, Hose | hose |
| A034M620 | Hose, Radiator | hose |
| A035D793 | Hose, Reducer | hose |
| A041E802 | Hose, Flexible | hose |
| A041E804 | Hose, Flexible | hose |
| A041E805 | Hose, Flexible | hose |
| A041G481 | Fitting, Hose Connector | hose |
| A041K419 | Hose, Flexible | hose |
| A041K421 | Hose, Flexible | hose |
| A041K423 | Hose, Flexible | hose |
| A041N322 | Hose, Flexible | hose |
| A041W423 | Hose, Flexible | hose |
| A042V946 | Hose - Assembly | hose |
| A042V947 | Hose - Assembly | hose |
| A042W143 | Hose, Radiator | hose |
| A042W144 | Hose, Radiator | hose |
| A042W150 | Hose, Radiator | hose |
| A042W159 | Hose, Radiator | hose |
| A042W502 | Coupling, Hose | hose |
| A044B673 | Hose Assembly | hose |
| A044B970 | Hose, Radiator | hose |
| A044B971 | Hose, Radiator | hose |
| A044B972 | Hose, Radiator | hose |
| A044B973 | Hose, Radiator | hose |
| A053A190 | Hose, Oil | hose |
| A053W057 | Hose, Coolant | hose |
| A058L485 | Hose, Inlet | hose |
| A058L487 | Hose, Flexible | hose |
| A058N093 | Hose, Flexible | hose |
| A058N094 | Hose, Flexible | hose |
| A058N095 | Hose, Flexible | hose |
| A058P393 | Hose, Flexible | hose |
| A059N182 | Hose, Flexible | hose |
| A059N184 | Hose, Flexible | hose |
| A059V639 | Hose, Oil | hose |
| A059V641 | Hose, Oil | hose |
| A059V647 | Hose, Oil | hose |
| A061G396 | Hose, Fuel | hose |
| A061G399 | Hose, Fuel | hose |
| A061G401 | Hose, Fuel | hose |
| A061G784 | Hose, Fuel | hose |
| A063A614 | Hose, Fuel | hose |
| 0098-5854-06 | Label, Marking | other_service |
| 0098-5854-07 | Label, Marking | other_service |
| 0098-5854-08 | Label, Marking | other_service |
| 0098-5854-09 | Label, Marking | other_service |
| 0098-5854-10 | Label, Bus Marking | other_service |
| 0098-6635 | Label, Ground | other_service |
| 0098-6943 | Label, Warning | other_service |
| 0098-8104-06 | Label, Warning | other_service |
| 0123-0329 | Regulator, Oil Maintainer | other_service |
| 0130-5947-02 | Tube, Water − ANSI Flanges | other_service |
| 0130-5949-02 | Tube, Water − No Flanges | other_service |
| 0130-6521-02 | Tube, Radiator − No Flanges | other_service |
| 0130-6529-02 | Bracket, Support | other_service |
| 0130-6531-02 | Tube, Radiator − ANSI Flanges | other_service |
| 0130-7177 | Exchanger, Heat | other_service |
| 0130-7270 | Spacer | other_service |
| 0140-1260 | Fitting, Filter | other_service |
| 0140-1548 | Element, Replacement | other_service |
| 0140-3963 | Filter, Air - Standard Duty | other_service |
| 0155-2080 | Clamp | other_service |
| 0193-0600 | Core, Radiator | other_service |
| 0232-3710-01 | Shim, Generator Mounting | other_service |
| 0232-3710-02 | Shim, Generator Mounting | other_service |
| 0232-3710-03 | Shim, Generator Mounting | other_service |
| 0232-3710-07 | Shim, Generator Mounting | other_service |
| 0232-4139-02 | Shim, Generator | other_service |
| 0300-6315-02 | Display, Control | other_service |
| 0300-6366-02 | Display, Control | other_service |
| 0305-1009 | Suppressor, Voltage | other_service |
| 0307-2874 | Relay, Control | other_service |
| 0307-2968-04 | Relay, Power | other_service |
| 0307-3003-01 | Relay, Ground Fault | other_service |
| 0319-5877 | Brace, Cover | other_service |
| 0321-0321-04 | Fuse, Fast | other_service |
| 0321-0321-06 | Fuse, Fast | other_service |
| 0321-0321-07 | Fuse, Fast | other_service |
| 0323-2192-04 | Connector, Plug | other_service |
| 0327-1536 | Card, Input Output | other_service |
| 0327-1593 | Card, Control | other_service |
| 0332-0941 | Tie, Cable (Not Shown) | other_service |
| 0332-1389 | Tie, Cable (Stator RTD) | other_service |
| 0332-1794 | Tie, Cable | other_service |
| 0332-2744-06 | Standoff, Insulator | other_service |
| 0332-4106 | Mount, Cable Tie | other_service |
| 0332-4145 | Rail, Terminal Block | other_service |
| 0332-4320 | Block, Terminal | other_service |
| 0337-0090 | Strap, Electrical | other_service |
| 0402-0666-03 | Isolator, Vibration | other_service |
| 0406-0810 | Hinge | other_service |
| 0406-0930 | Latch, Door | other_service |
| 0502-0080 | other_service | |
| 0502-1318 | *Adapter, Pipe | other_service |
| 0502-1326 | Adapter, Pipe | other_service |
| 0502-1479 | other_service | |
| 0503-0398 | other_service | |
| 0503-1133 | other_service | |
| 0503-1137 | other_service | |
| 0503-1138 | Clamp | other_service |
| 0503-1950 | other_service | |
| 0503-2386 | other_service | |
| 0503-2823 | other_service | |
| 0504-0229 | Valve, Ball | other_service |
| 0504-0251 | other_service | |
| 0505-0007 | *Bushing, Reducer | other_service |
| 0505-0051 | Elbow | other_service |
| 0505-0102 | Adapter, Close Nipple | other_service |
| 0505-0131 | other_service | |
| 0505-0141 | other_service | |
| 0505-0324 | Fitting, Nipple | other_service |
| 0505-2113 | Regulator, Oil Maintainer | other_service |
| 0505-2124-02 | Flange, Pipe − No Flanges | other_service |
| 0505-2125-02 | Flange, Pipe − No Flanges | other_service |
| 0505-2153-02 | Adapter, Pipe − ANSI Flanges | other_service |
| 0505-2155-02 | Adapter, Pipe − ANSI Flanges | other_service |
| 0505-2274 | Adapter, Pipe | other_service |
| 0505-2294-02 | Adapter, Pipe | other_service |
| 0505-2312-02 | Flange, Pipe | other_service |
| 0505-2313-02 | Flange, Pipe | other_service |
| 0505-2354 | Adapter, Pipe | other_service |
| 0505-2355 | Adapter, Pipe | other_service |
| 0508-1194 | Housing, Terminal | other_service |
| 0509-0353 | other_service | |
| 0517-0137 | Housing, Terminal | other_service |
| 0517-0138-08 | Plug, Hole | other_service |
| 0518-0548-08 | Clamp − Enhanced High Ambient | other_service |
| 0518-0548-19 | other_service | |
| 0518-0548-46 | Clamp | other_service |
| 0518-0704 | other_service | |
| 0526-0011 | Harness, Alternating Current | other_service |
| 0526-0018 | other_service | |
| 0526-0027 | Skid - High Temp Radiator | other_service |
| 0526-0100 | Box, Terminal | other_service |
| 0526-0219 | Nipple (2.5 x 3.0 LG) | other_service |
| 0526-0324 | other_service | |
| 0526-0399-13 | Washer, Flat | other_service |
| 0526-0399-54 | Washer, Flat | other_service |
| 0526-0399-56 | Washer-Flat (M5) | other_service |
| 0526-0399-58 | Control, Genset | other_service |
| 0526-0399-59 | Control, Genset | other_service |
| 0526-0399-60 | Washer-Flat (M8) | other_service |
| 0526-0399-62 | Washer-Flat (M10) | other_service |
| 0526-0399-63 | Washer, Flat | other_service |
| 0526-0399-66 | other_service | |
| 0526-0399-70 | Washer, Flat | other_service |
| 0526-0399-78 | Skid - High Temp Radiator | other_service |
| 0526-0399-79 | other_service | |
| 0526-0451 | Box, Terminal | other_service |
| 0526-2060 | Card, Control | other_service |
| 0526-2080 | Transformer, Current | other_service |
| 0526-2183 | other_service | |
| 0526-2403-79 | other_service | |
| 0800-0004 | other_service | |
| 0800-0088 | Screw, Hex Head | other_service |
| 0800-0090 | Box, Terminal | other_service |
| 0800-0091 | Box, Terminal | other_service |
| 0800-0095 | Box, Terminal | other_service |
| 0800-0155 | other_service | |
| 0800-0309-75 | other_service | |
| 0800-2059 | Harness, Alternating Current | other_service |
| 0800-2060 | Screw, Hex Head | other_service |
| 0800-2247 | other_service | |
| 0800-2515 | Box, Terminal | other_service |
| 0800-3017-36 | other_service | |
| 0800-3017-37 | Screw-Hex Head (M10 X 25) | other_service |
| 0800-3017-38 | Regulator, Oil Maintainer | other_service |
| 0800-3017-39 | Screw, Hex Head | other_service |
| 0800-3017-41 | other_service | |
| 0800-3017-46 | other_service | |
| 0800-3017-52 | other_service | |
| 0800-3017-56 | other_service | |
| 0800-3017-58 | other_service | |
| 0800-3017-72 | other_service | |
| 0800-3017-73 | other_service | |
| 0800-3047-04 | Skid - High Temp Radiator | other_service |
| 0800-6351 | other_service | |
| 0800-6524-03 | other_service | |
| 0815-0776 | other_service | |
| 0815-0793-05 | Card, Input Output | other_service |
| 0815-0793-07 | Module, Alarm | other_service |
| 0815-0947 | Panel, Ancillaries | other_service |
| 0815-0949 | Panel, Ancillaries | other_service |
| 0818-0231-03 | other_service | |
| 0819-1154 | Card, Control | other_service |
| 0821-2020 | Control, Genset | other_service |
| 0821-6001-01 | Module, Alarm | other_service |
| 0821-6001-02 | Harness, Wiring (Winding RTD) | other_service |
| 0821-6002-02 | Screw, Hex Head | other_service |
| 0821-6002-03 | Screw, Hex Head | other_service |
| 0821-6003-01 | Screw, Hex Head | other_service |
| 0821-6003-02 | Screw, Hex Head | other_service |
| 0821-6004-01 | Harness, Wiring (Winding RTD) | other_service |
| 0823-1001-03 | Card, Control | other_service |
| 0850-0030 | other_service | |
| 0850-0114-55 | Washer-Lock (M10) | other_service |
| 0850-2012 | Box, Control Mounting | other_service |
| 0851-0023 | Box, Terminal | other_service |
| 0851-0048-01 | Washer, Belleville | other_service |
| 0853-0040-53 | Control, Genset | other_service |
| 0853-2005 | Harness, Wiring (Winding RTD) | other_service |
| 0853-2006 | Washer, Lock | other_service |
| 0853-2010 | other_service | |
| 0856-0008 | Output Box Panel | other_service |
| 0856-0013 | Box, Control Mounting | other_service |
| 0856-0016 | other_service | |
| 0860-2010 | Breaker, Circuit | other_service |
| 0860-2024-01 | other_service | |
| 0860-2053 | Panel, Ancillaries | other_service |
| 0860-2072 | other_service | |
| 0862-0008 | other_service | |
| 0862-0016 | Box, Terminal | other_service |
| 0862-0026-52 | Control, Genset | other_service |
| 0862-0026-54 | Control, Genset | other_service |
| 0862-0026-56 | Nut Hex (M10) | other_service |
| 0862-0026-58 | other_service | |
| 0870-2044 | Nut, Weld (Not Shown) | other_service |
| 0870-2062 | Harness, AC − MV7 | other_service |
| 0870-2065-01 | Housing, Terminal - P7 - No Control | other_service |
| 0870-2065-02 | Nut, Hex Flange | other_service |
| 0870-2065-03 | Nut, Hex Flange | other_service |
| 0898-1368 | Sleeve, Braided | other_service |
| 098-2235-02 | Label, Ground | other_service |
| 098-2304 | Labels | other_service |
| 098-2304-01 | Labels | other_service |
| 098-4500 | Labels | other_service |
| 098-4730 | Labels | other_service |
| 098-4732 | Labels | other_service |
| 098-4798 | Labels | other_service |
| 098-5347 | Cover, Circuit Breaker | other_service |
| 098-5347-01 | Heater, Control | other_service |
| 098-5347-02 | Cover, Circuit Breaker | other_service |
| 098-5759 | Labels | other_service |
| 098-5822 | Labels | other_service |
| 098-5842 | Labels | other_service |
| 098-5854-06 | Label, Marking | other_service |
| 098-5854-07 | Label, Marking | other_service |
| 098-5854-08 | Label, Marking | other_service |
| 098-5854-09 | Label, Marking | other_service |
| 098-5854-10 | Label, Bus Marking | other_service |
| 098-6030 | other_service | |
| 098-6074-02 | Labels | other_service |
| 098-6195 | Cover, Control | other_service |
| 098-6635 | Label, Ground | other_service |
| 098-6650-01 | Labels | other_service |
| 098-6775 | Labels | other_service |
| 098-7613 | Box, Terminal - P7 - Circuit Breaker Box | other_service |
| 098-7785 | Detectors, Resistive Temperature – MV7 | other_service |
| 098-7883-01 | other_service | |
| 098-7883-02 | other_service | |
| 098-7883-03 | other_service | |
| 098-7883-04 | other_service | |
| 098-7883-05 | other_service | |
| 098-7883-06 | other_service |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.
The Cummins/Onan QSK78-G15 powers 1 generator set(s), including Cummins/Onan C3750D5.