The Cummins/Onan QSK19-G8 is a turbocharged and charged after-cooled (air- to-air) engine rated at 1800 rpm. It powers generator sets from Cummins/Onan, including the DQPAA and DQPAB. It holds 68.1 L (18.0 gal) of oil.
Also known as: Cummins Inc. QSK19-G8
Part of the Cummins/Onan QSK19 engine family — 10 variants share parts & fitment.
| Oil capacity | 68.1 L |
|---|---|
| Aspiration | Turbocharged and charged after-cooled (air- to-air) |
| Rated speed | 1800 rpm |
How to read your Cummins/Onan engine serial & model number →
| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Other | AC waveform THD (THDV) | < 5 | % | no load to full linear load |
| Other | BMEP at set rated load (prime) | 1885 | kPa | prime rating |
| Other | BMEP at set rated load (standby) | 2109 | kPa | standby rating |
| Other | Breaker fail to synchronize default time delay | 120 | s | adjustable 10–900 s |
| Other | Derate above 1402 m (4600 ft) / 40 °C | 4.5% per 305 m (1000 ft) and 11.0% per 10 °C (18 °F) | standby and prime | |
| Other | High AC voltage shutdown default | 110% | % of nominal voltage | for 10 s; adjustable 105–125%, 0.1–10 s |
| Other | Instantaneous pickup (Ii) range (Micrologic 3.0 and 5.0) | 1.5–12 x In | x In | |
| Other | Long-time delay tr | 0.5–24 | s | at 6 x Ir |
| Other | Long-time pickup (Ir) adjustment range | 0.4–1.0 x In | x In | sensor plug rating In |
| Other | Low AC voltage shutdown default | 85% | % of reference voltage | for 10 s; adjustable 50–95%, 2–20 s |
| Other | Over frequency shutdown/warning default | 6 | Hz above nominal | for 20 s, disabled; adjustable 2–10 Hz above set point, 1–20 s |
| Other | Over load (kW) warning default | 105% | % of rated kW | adjustment range 80–140%, 0–120 s delay; default 60 s |
| Other | Piston speed | 11.4 | m/s | |
| Other | Reverse Var shutdown default | 20% | % of rated Var | for 10 s; adjustable 15–50%, 10–60 s |
| Other | Reverse power shutdown default | 10% | % of standby kW | for 3 s; adjustable 5–20%, 1–15 s |
| Other | Short circuit protection threshold | 175% | % of rating | output current on any phase |
| Other | Telephone Harmonic Factor (THF) | < 3 | ||
| Other | Telephone Influence Factor (TIF) | < 50 | per NEMA MG1-22.43 | |
| Other | Under frequency shutdown default | 6 | Hz below reference | for 10 s; adjustable 2–10 Hz below set point, 5–20 s |
| Other | Wire stripping length | 1.38 In (35 mm) | in | |
| Pressure | Maximum air cleaner restriction | 6.2 | kPa | |
| Pressure | Maximum back pressure | 6.8 | kPa | exhaust |
| Pressure | Maximum cooling air flow static restriction | 0.12 | kPa | |
| Pressure | Maximum fuel inlet restriction | 30 | kPa | |
| Pressure | Maximum fuel return line restriction | 34 | kPa | |
| Speed | Frequency regulation | Isochronous | ||
| Speed | Overspeed limit | 2100 ±50 | rpm | |
| Speed | Random frequency variation | ± 0.25 | % | |
| Speed | Rated speed | 1800 | rpm | 60 Hz |
| Temperature | Ambient design (standard set-mounted radiator) | 50 | °C | |
| Temperature | Exhaust temperature at set rated load (prime) | 463 | °C | prime |
| Temperature | Exhaust temperature at set rated load (standby) | 469 | °C | standby |
| Temperature | Maximum aftercooler inlet temp | 49 | °C | |
| Temperature | Maximum fuel inlet temperature | 71 | °C | |
| Temperature | Maximum jacket water outlet temp (remote radiator) | 104 | °C | standby |
| Torque | Circuit breaker terminal tightening torque (AWG 1/0...750 kcmil) | 548.75 Lbf.In (62 N.m) | Lbf.In | 0.08…0.62 in² (50…400 mm²) |
| Voltage | Random voltage variation | ± 0.5 | % | |
| Voltage | Standard temperature rise | 150 | °C | Standby at 40 °C ambient |
| Voltage | Voltage regulation, no load to full load | ± 0.5 | % |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
| Fluid | Grade | Standard | Ambient | Capacity | Notes |
|---|---|---|---|---|---|
| Fuel | ASTM D975 No. 2-D | ASTM D975 | Cetane number: 40-50. 300-500 ppm Sulfur. Fuel inlet temperature 40°C (104°F) reference. |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
| Code | Name | Meaning | Severity | Action |
|---|---|---|---|---|
| 27 | Low AC voltage shutdown | Voltage on any phase has dropped below a preset value. | Shutdown | Adjustable 50-95% of reference voltage, time delay 2-20 seconds; default 85% for 10 seconds. |
| 32 | Reverse power shutdown | Reverse power detected. | Shutdown | Adjustment range 5-20% of standby kW rating, delay 1-15 seconds; default 10%, 3 seconds. |
| 40 | Reverse Var shutdown | Reverse reactive power detected. | Shutdown | Adjustable 15-50% of rated Var output, delay 10-60 seconds; default 20%, 10 seconds. |
| 46 | Negative sequence overcurrent warning | Excessive imbalances in the three phase load currents and/or power factors. | Warning | Control protects generator from damage due to phase imbalance. |
| 51 | Overcurrent warning/shutdown | Implementation of the thermal damage curve with instantaneous trip level based on CT ratio and application power rating. | Shutdown | AmpSentry protective relay action; see document R1053 time over current curve. |
| 51G | Ground fault overcurrent | Detects a ground fault via external ground fault relay contact input or measured ground current from external CT. | Shutdown | Time delays and thresholds adjustable via InPower or HMI. |
| 59 | High AC voltage shutdown | Output voltage on any phase exceeds preset values; trip time inversely proportional to amount above threshold. | Shutdown | Adjustable 105-125% of nominal voltage, time delay 0.1-10 seconds; default 110% for 10 seconds. |
| 81 u | Under Frequency Shutdown | Genset output frequency cannot be maintained. Adjustable 2-10 Hz below reference governor set point, time delay 5-20 s. Default 6 Hz, 10 s. | Shutdown | |
| 81o | Over frequency shutdown/warning | Genset is operating at a potentially damaging frequency level. | Warning | Adjustable 2-10 Hz above nominal governor set point, 1-20 second delay; default 6 Hz, 20 seconds, disabled. |
| 81u | Under frequency shutdown | Genset output frequency cannot be maintained. | Shutdown | Adjustable 2-10 Hz below reference governor set point, 5-20 second delay; default 6 Hz, 10 seconds. |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Tools: Trip unit test kit
⚠ Wait a minimum of 15 minutes after circuit breaker trips before resetting to allow thermal imaging to reset completely to zero.
Tools: Wire seal MICROTUSEAL
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
| Voltage | Phase | Connection | Leads | Notes |
|---|---|---|---|---|
| 12470-13800 | 3 | Wye, 3-phase | Winding no. 6062 | Temp rise 125/105/80 °C; ADS-521; feature code B448; max surge kVA 91 |
| 220/380 | 3 | 6 leads | 6 | Winding no. 13; 125°C rise rating 2004 kW / 2505 kVA; stator resistance L-L 0.00102 Ohms; rotor resistance 2.31 Ohms @22°C |
| 240/416 | 3 | 6 leads | 6 | Winding no. 13; 125°C rise rating 2004 kW / 2505 kVA; stator resistance L-L 0.00102 Ohms; rotor resistance 2.31 Ohms @22°C |
| 254/440 | 3 | 6 leads | 6 | Winding no. 312; 125°C rise rating 2000 kW / 2500 kVA; stator resistance L-L 0.00152 Ohms; rotor resistance 2.31 Ohms @22°C |
| 277/480 | 3 | 6 leads | 6 | Winding no. 312; 125°C rise rating 2080 kW / 2600 kVA; stator resistance L-L 0.00152 Ohms; rotor resistance 2.31 Ohms @22°C |
| 277/480 | 3 | Wye, 4 Wire | Feature code R002-2 Voltage-277/480, 3 Phase, Wye, 4 Wire | |
| 346/600 | 3 | 6 leads | 6 | Winding no. 07; 125°C rise rating 2080 kW / 2600 kVA; stator resistance L-L 0.00220 Ohms; rotor resistance 2.31 Ohms @22°C |
| 380 | 3 | Wye, 3-phase | Winding no. 7327 | Temp rise 150/125/105 °C; ADS-335; feature code B595; max surge kVA 312 |
| 4160 | 3 | Wye, 3-phase | Winding no. 6307 | Temp rise 125/105/80 °C; ADS-324; feature code B467; max surge kVA 51 |
| 480 | 3 | Wye, 3-phase | Winding no. 7361 | Temp rise 125/105/80 °C; ADS-333; feature code B462; max surge kVA 312 |
| 600 | 3 | Wye, 3-phase | Winding no. 7361 | Temp rise 125/105/80 °C; ADS-333; feature code B465; max surge kVA 07 |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
| Part # | Description | Category |
|---|---|---|
| QSK19G | Engine model QSK19G | Engine |
| QSK60G | Engine model QSK60G | Engine |
| QSV91G | Cummins QSV91G lean burn gas generator sets | Engine |
| FP-3202283 | Gasket, Water Pump | Gasket |
| M-4352582 | Upper Gasket Set | Gasket |
| M-4352587 | Upper Gasket Set | Gasket |
| M-3081837 | Head Bolt – QSK19 | Head bolt |
| 9001-01 | IMPELLER | Impeller |
| 3007525 | (3022157) KIT, LINER LINER, CYLINDER | Service part / kit |
| 3012611 | CYLINDER LINER (O/S) KIT, LINER A/R .020 inch O/S | Service part / kit |
| 3012612 | CYLINDER LINER (O/S) KIT, LINER A/R .030 Inch O/S | Service part / kit |
| 3022157 | Cylinder Liner STD | Service part / kit |
| 3023017 | Cylinder Liner +.010" UPF | Service part / kit |
| 3023018 | Cylinder Liner +.020" UPF | Service part / kit |
| 3023019 | Cylinder Liner +.030" UPF | Service part / kit |
| 3023020 | Cylinder Liner +.040" UPF | Service part / kit |
| 3096680 | Piston STC 13.8:1 Ratio | Service part / kit |
| 3096681 | Piston KT Series 15.5:1 Ratio | Service part / kit |
| 3096682 | Piston KTA Series 14.5:1 Ratio | Service part / kit |
| 3096683 | Piston 13.5:1 Ratio | Service part / kit |
| 3096684 | Piston KTA 15.7:1 Ratio | Service part / kit |
| 3096685 | Piston STC 13.9:1 Ratio | Service part / kit |
| 3628731 | Piston STC Kit | Service part / kit |
| 3630913 | Piston KTA-50-G7 | Service part / kit |
| 3631241 | Piston Kit STC 13.9:1 Ratio | Service part / kit |
| 3631242 | Piston Kit 13.5:1 Ratio | Service part / kit |
| 3631243 | Piston Kit KTA 15.7:1 Ratio | Service part / kit |
| 3631244 | Piston Kit KTA Series 14.5:1 Ratio | Service part / kit |
| 3631245 | Piston Kit KT Series 15.5:1 Ratio | Service part / kit |
| 3631246 | Piston Kit STC 13.8:1 Ratio | Service part / kit |
| 3801268 | CYLINDER LINER (O/S) KIT, LINER A/R .040 Inch O/S | Service part / kit |
| 3801269 | Liner Kit +.040" UPF | Service part / kit |
| 3803530 | Piston Assembly STC | Service part / kit |
| 3804747 | Piston Kit KTA-50-G7 | Service part / kit |
| 3804885 | Piston KTA-50-G8/G9 | Service part / kit |
| 4009220 | Cylinder Liner QSK19/KT19 STD | Service part / kit |
| 4009221 | Cylinder Liner +.020" UPF | Service part / kit |
| 4009222 | Cylinder Liner +.040" UPF | Service part / kit |
| 4009227 | Cylinder Liner KT19 Block Type #2 | Service part / kit |
| 4009233 | Cylinder Liner +.060" UPF | Service part / kit |
| 4024767 | Cylinder Liner Kit QSK19/KT19 STD | Service part / kit |
| 4024768 | Cylinder Liner Kit +.020" UPF | Service part / kit |
| 4024769 | Cylinder Liner Kit +.040" UPF | Service part / kit |
| 4024770 | Cylinder Liner Kit KT19 Block Type #2 | Service part / kit |
| 4024775 | Cylinder Liner Kit +.060" UPF | Service part / kit |
| 4089847 | Piston Kit GTA38/19 | Service part / kit |
| 4090013 | Piston Kit KTA-38-M2 | Service part / kit |
| 4090029 | Piston Kit QSK19CE | Service part / kit |
| 4090181 | Piston GTA38/19 | Service part / kit |
| 4097889 | Piston KTA-38-M2 | Service part / kit |
| 4333987 | Cylinder Liner +.020" / +.020" | Service part / kit |
| 4333988 | Cylinder Liner +.060" / +.020" | Service part / kit |
| 4333989 | Cylinder Liner +.060" / STD | Service part / kit |
| 4333991 | Cylinder Liner QSK19 STD/STD | Service part / kit |
| 4371771 | Cylinder Liner Kit +.020" / +.020" | Service part / kit |
| 4371772 | Cylinder Liner Kit +.060" / +.020" | Service part / kit |
| 4371773 | Cylinder Liner Kit +.060" / STD | Service part / kit |
| 4371779 | Cylinder Liner Kit QSK19 STD/STD | Service part / kit |
| 4910463 | Piston QSK19R/M | Service part / kit |
| 4910465 | Piston QSK Series | Service part / kit |
| 4916177 | Piston GTA/GQSK19 | Service part / kit |
| 4918058 | Piston QSK19CE | Service part / kit |
| 4922319 | Piston QSK19C | Service part / kit |
| 4955233 | Piston Kit QSK19R/M | Service part / kit |
| 4955235 | Piston Kit QSK Series | Service part / kit |
| 4955236 | Piston Kit QSK19C | Service part / kit |
| 4955238 | Piston Kit GTA/GQSK19 | Service part / kit |
| 526-0100 | Washer, Flat (9/16' ID x | Service part / kit |
| 800-0093 | Screw, Hex Head | Service part / kit |
| 800-0094 | Screw, Cap – Hex Head (1/2–13 x 2") | Service part / kit |
| 821-2096-03 | Screw, Flange Head Lock | Service part / kit |
| 821-6003-02 | Screw, Cap - Hex Head (M8 x 1.25 x 25mm) | Service part / kit |
| 851-0023 | Washer | Service part / kit |
| 862-0016 | Nut, Hex | Service part / kit |
| 870-2054 | Nut, Flanged Locking (M6) | Service part / kit |
| A040A357 | Panel, Cover | Service part / kit |
| A040B391 | Busbar, Ground | Service part / kit |
| A040J745 | Bracket | Service part / kit |
| A041A931 | Busbar, Copper | Service part / kit |
| A041Z271 | Panel, Terminal | Service part / kit |
| A042X594 | Busbar, Copper | Service part / kit |
| A043K271 | Box, Circuit Breaker | Service part / kit |
| BER0005 | BEARING | Service part / kit |
| BER0020 | BEARING | Service part / kit |
| CAMSET0019 | CAM LINER(BRONZE) | Service part / kit |
| FP-3090469 | Valve, Exhaust | Service part / kit |
| FP-3170135 | Guide, Valve | Service part / kit |
| FP-4089500 | Piston Ring Set | Service part / kit |
| FP-4095009 | Pin, Piston (Exc. Articulated Pistons) | Service part / kit |
| FP-4957806 | Spring, Valve | Service part / kit |
| JSK0069 | SERVICE KIT | Service part / kit |
| QSK19 | Fuel System | Service part / kit |
| SHA0088 | SHAFT | Service part / kit |
| FP-3042827 | Shaft, Water Pump | Pump |
| 4308809 | Flat Seal for Cylinder Liner | Seal |
| 4333984 | D-Type Seal Liner | Seal |
| 4371769 | Seal Kit | Seal |
| 4371770 | D-Type Seal Kit | Seal |
| MCSSET0006 | M-SEAL | Seal |
| FP-3076489 | Thermostat | Thermostat |
| 338-4386 | Harness, Meter | Wiring |
| A029G375 | Harness, Relay | Wiring |
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 QSK19-G8 engine has an oil capacity of 68.1 liters.
The Cummins/Onan QSK19-G8 powers 2 generator set(s), including Cummins/Onan DQPAA, Cummins/Onan DQPAB.