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Home›Engines›Cummins/Onan KTA 50 G8-I

Cummins/Onan KTA 50 G8-I Engine

The Cummins/Onan KTA 50 G8-I is a 50.3 L 16-cylinder turbocharged-aftercooled engine, producing up to 1735 kW. It powers generator sets from Cummins/Onan. It holds 177 L (46.8 gal) of oil and 510 L (134.7 gal) of coolant.

Also known as: Cummins KTA 50 G8-I

Part of the Cummins/Onan KTA50 engine family — 19 variants share parts & fitment.

50.3 L
Displacement
16
Cylinders
1735 kW
Gross power
177.0 L
Oil capacity
On this pageSpecsGenerator setsFAQ

Engine specifications

Oil capacity177.0 L
Coolant capacity510.0 L
Displacement50.3 L
Cylinders16
AspirationTurbocharged-Aftercooled
Gross power1735 kW

Generator sets powered by this engine

1
Cummins/Onan KTA 50 G8-I

How to read your Cummins/Onan engine serial & model number →

Parts cataloged across the Cummins/Onan KTA50 family

300
Part #DescriptionCategory
140-2096Element, Primary (Outer)Air filter
140-2098Air Cleaner - Throwaway TypeAir filter
140-2467Element, Safety (Inner)Air filter
140-2501Cleaner, Air (Disposable)Air filter
140-2502Band, Mounting – Air CleanerAir filter
140-2503Bracket, MountingAir filter
140-3163Cleaner, Air (No Replaceable Element)Air filter
140-3230Cleaner, Air (Includes Elements - See Ref. No. 25 and 26)Air filter
309-0272Regulator, Voltage - 24 VDC (Used on 35 A MP Alternator)Alternator
309-0561Alternator & Drive Components Group Pulley. Alternator - Multi Groove (Use with 35 A MP Alternator)Alternator
503-1743-01Alternator & Orive Components Group Pulley, Alternator - Multi Groove (Use with 35 AMP Alternator)Alternator
206587CAP, MAIN BEARINGBearing cap
206588CAP, MAIN BEARINGBearing cap
98-5347Decal - Caution Fan Drive & Lube Components Group Belt.Belt
106069SCREW, HEXAGON HEAD CAPBolt
205584SCREW, TWELVE POINT CAPBolt
206028SCREW, SOCKET HEAD CAPBolt
3032633SCREW, TWELVE POINT CAPBolt
3177945SCREW, HEX FLANGE HEAD CAPBolt
3628452SCREW, HEXAGON HEAD CAPBolt
S-112SCREW, HEXAGON HEAD CAPBolt
205684BRACKET, LIFTINGBracket lifting
205230BUSSINGBushing
0300-4623-29DFLB (600V)Current transformer
0300-4623-30DFLC (600V)Current transformer
0300-4623-52DFLB BR (0-480V)Current transformer
0300-4623-54DFLC BR (0-480V)Current transformer
3178803CYLINDER BLOCK OPTION BP6089Cylinder block
3178910CYLINDER BLOCKCylinder block
148582DOE, PINDowel pin
70662DOE, PINDowel pin
3629497DRAINCOCKDraincock
206224PLUG, EXPANSIONExpansion plug
206742PLUG, EXPANSIONExpansion plug
3629168PLUG, EXPANSIONExpansion plug
122-0757Filter. Water - W/Corosion Inhibiting ChemicalFilter
159-1445Reservoir, FuelFluid
FS1216Fuel/Water Sep Spin-OnFuel filter
121-0113Gasket, PumpGasket
121-0117Gasket, Hand HoleGasket
205059WASHER, PLAINGasket
3002993DOE, RINGGasket
3025485WASHER, PLAINGasket
3176857DOE, RINGGasket
3178450WASHER, PLAINGasket
3178457WASHER, PLAINGasket
M-4352581Upper Gasket SetGasket
S-604WASHER, LOCKGasket
S-610WASHER, LOCKGasket
338-2529Harness. WiringHarness
128-0108Insulation, Hose – Bulk (Order By The Foot – 12 Feet Required)Hose
130-3538Chemical DCA4 Service Pre-Charging Complete SystemHose
130-3576Clamp, HoseHose
130-5588-02Tube, Water HeaterHose
130-5589-02Tube, Water HeaterHose
130-5590-02Tube, Water HeaterHose
130-5591-02Tube, Water HeaterHose
338-2925Hose, RadiatorHose
501-0704Line, Flexible Fuel - Fuel OutHose
501-0707Line, Flexible Fuel - Fuel InHose
502-1162Connector, Hose (3/8")Hose
503-0183Clamp, HoseHose
503-0685Clamp, HoseHose
503-0868Clamp, Hose - T-Bolt Type (3.5" NON)Hose
503-1140Hose, RubberHose
503-1484Elbow, Hose (45 Deg) (7" ID)Hose
503-1620Hose – Bulk (3/8" ID) (Order by the Foot)Hose
503-1727Hose, Radiator (3” ID x 10”)Hose
503-1728Hose (3” ID x 5–1/2”)Hose
503-1870-11Clamp, HoseHose
503-1870-12Clamp, HoseHose
505-0324Hose. Bulk (Sold by the Foot) Two Feet Required Nipple, Pipe - Half (3/4 NPT x 2"LG)Hose
518-0548-24Clamp, HoseHose
98-5759Drive - Multi Groove Hose, Flexible - Lube (Grease)Hose
98-5842Clamp, Hose - T-Bolt Type (3.5" NON)Hose
3375004Dial Indicator Kit for injector and valve adjustmentInjector
3822575Injector and valve adjustment kitInjector
FP-3053124Injector Assembly, PTK (New)Injector
3011884INSERT, LINERInsert liner
3019150INSERT, LINERInsert liner
3021148INSERT, LINERInsert liner
206580BEARING, MAINMain bearing
206581BEARING, MAIN A/R No.2,3,4,5,6,7,&8, UpperMain bearing
206582BEARING, MAIN A/R No.2,3,4,5,6,7,&8, UpperMain bearing
206583BEARING, MAIN A/R No.2,3,4,5,6,7,&8, UpperMain bearing
206584BEARING, MAIN A/R No.2,3,4,5,6,7,&8, UpperMain bearing
206590BEARING, MAINMain bearing
206591BEARING, MAIN A/R No.2,3,4,5,6,7,&8, LowerMain bearing
206592BEARING, MAIN A/R No.2,3,4,5,6,7,&8, LowerMain bearing
206593BEARING, MAIN A/R No.2,3,4,5,6,7,&8, LowerMain bearing
206594BEARING, MAIN A/R No.2,3,4,5,6,7,&8, LowerMain bearing
206600BEARING, MAINMain bearing
206601BEARING, MAIN A/R No.1&9, UpperMain bearing
206602BEARING, MAIN A/R No.1&9, UpperMain bearing
206603BEARING, MAIN A/R No.1&9, UpperMain bearing
206604BEARING, MAIN A/R No.1&9, UpperMain bearing
206610BEARING, MAINMain bearing
206611BEARING, MAIN A/R No.1&9, LowerMain bearing
206612BEARING, MAIN A/R No.1&9, LowerMain bearing
206613BEARING, MAIN A/R No.1&9, LowerMain bearing
206614BEARING, MAIN A/R No.1&9, LowerMain bearing
3018210SET, MAIN BEARING STANDARDMain bearing set
3018211SET, MAIN BEARING A/R .010 Inch O/SMain bearing set
3018212SET, MAIN BEARING A/R .020 Inch O/SMain bearing set
3018213SET, MAIN BEARING A/R .030 Inch O/SMain bearing set
LF3325Full-flow spin-on lubricating oil filter elementOil filter
016-40820Harness, Wiring (Includes Cable Ties and Terminals)Service part / kit
102-1335Plug, Oil DrainService part / kit
121-0116Cover, Hydraulic HoleService part / kit
130-2981Cap. Radiator - 7#PSIService part / kit
130-3758Radiator (includes Cap)Service part / kit
140-1260Fitting, Safety FilterService part / kit
140-1548Indicator, ServiceService part / kit
140-2097Cleaner, Air (Includes Elements)Service part / kit
140-2099BandService part / kit
140-2395Tube, Air InletService part / kit
140-2504-01Bracket - Right SideService part / kit
140-2504-02Bracket - Left SideService part / kit
140-2508Tube, Air Inlet (7" x 9" - 3/4")Service part / kit
140-2509Tube, Air InletService part / kit
140-2515Bracket, MountingService part / kit
140-2519Tube, Air InletService part / kit
140-2521Tube, Air InletService part / kit
140-2528Shield – Air In HeatService part / kit
300-2856Board Assy, Printed CircuitService part / kit
300-2863Board Assy, Printed Circuit - Relay Assembly- (A14)Service part / kit
3007525(3022157) KIT, LINER LINER, CYLINDERService part / kit
301-9054-01Decal - Panel Front Markings (Control With Meters)Service part / kit
301-9054-02Clip - FastenerService part / kit
301-9054-03Clip - FastenerService part / kit
3012611CYLINDER LINER (O/S) KIT, LINER A/R .020 inch O/SService part / kit
3012612CYLINDER LINER (O/S) KIT, LINER A/R .030 Inch O/SService part / kit
302-1720Meter, Frequency (M23)Service part / kit
302-1753Ammeter (M22) See Current Transformer & Ammeter Installation Figure for Parts)Service part / kit
302-1800Ammeter (M22) Scale in Amps as Indicated 0-2000/0-4000 (600 VAC Application) 0-3000/0-6000 (120-480 VAC Application)Service part / kit
302-1908Screw. Cap - Hex Head (M8-1.25 x 35MM)Service part / kit
305-0813-01Battery charger, Onan, 120V, 375WService part / kit
305-0818-02EOOO-21002Service part / kit
307-1056Relay. 24 VDCService part / kit
307-19872 307-1056 3 3 815-0388 6 4 323-0804 3 5 815-0544 3 6 319-0447 1 7 NOTE 1 REF 8 NOTE 2Service part / kit
308-0882Decal - Panel Front Markings (Control Without Meters)Service part / kit
309-0436Decal - Model Identification ONAN GEN SET CUMMINS GEN SET CUMMINS ONAN GEN SETService part / kit
309-0437(222"F)Service part / kit
309-0635-02Valve, CheckService part / kit
3096680Piston STC 13.8:1 RatioService part / kit
3096681Piston KT Series 15.5:1 RatioService part / kit
3096682Piston KTA Series 14.5:1 RatioService part / kit
3096683Piston 13.5:1 RatioService part / kit
3096684Piston KTA 15.7:1 RatioService part / kit
3096685Piston STC 13.9:1 RatioService part / kit
319-0447Screw. Machine - Pan Head. Cross-Recessed Drive (#6-32 x 1/2")Service part / kit
319-0754Tie. CableService part / kit
322-0363Component 322-0363Service part / kit
323-0804Screw. Machine - Round Head with IT Lock Washer (#6-32 x 1/2")Service part / kit
323-1200# Socket, Contact (Used in J1, J2)Service part / kit
323-1304tiotming, UmectorService part / kit
323-1306Genset component (SJB series)Service part / kit
3318201Battery Cable GroupService part / kit
332-0052Clamp, LoopService part / kit
332-0607Block, Terminal (T81)Service part / kit
332-1279Terminal. Lug - Ring (3/8Service part / kit
332-1292Sender, Pressure - Oil (E123)Service part / kit
332-1445Tie, Cable 18 98-5219 1 Decal - Panel Front (Not I l l u s t r a t e d ) 19 98-5220 1 DecalService part / kit
332-1673Terminal, Wire - SpadeService part / kit
332-2634Clamp, HoseService part / kit
332-2723Strip. MarkerService part / kit
333-0677-01Heater, Coolant - 4990 WattService part / kit
333-0677-02Heater, Coolant - 6420 WattService part / kit
3375005Dial indicator extensionService part / kit
3375007Support Plate / Support Block for dial indicatorService part / kit
338-1835Harness, Wiring (A13 to A l l )Service part / kit
338-1836Harness, Wiring (A14 to All) (Relays)Service part / kit
338-1904Harness. Wiring (A15 to All)Service part / kit
338-2278Harness. Wiring - AC (Includes Terminal Block & Cable Ties) [Used only with meters]Service part / kit
338-2532Terminal. Lug - Forked (No. 6 Screw)Service part / kit
355-0093Voltmeter (M21) Dual Scale 0-300/0-600V Single Scale 0-750VService part / kit
3628731Piston STC KitService part / kit
3630913Piston KTA-50-G7Service part / kit
3631241Piston Kit STC 13.9:1 RatioService part / kit
3631242Piston Kit 13.5:1 RatioService part / kit
3631243Piston Kit KTA 15.7:1 RatioService part / kit
3631244Piston Kit KTA Series 14.5:1 RatioService part / kit
3631245Piston Kit KT Series 15.5:1 RatioService part / kit
3631246Piston Kit STC 13.8:1 RatioService part / kit
3801268CYLINDER LINER (O/S) KIT, LINER A/R .040 Inch O/SService part / kit
3803530Piston Assembly STCService part / kit
3804747Piston Kit KTA-50-G7Service part / kit
3804885Piston KTA-50-G8/G9Service part / kit
406-0333Component 406-0333Service part / kit
406-0334Clip, Retaining - Turnbutton FastenerService part / kit
4089847Piston Kit GTA38/19Service part / kit
4090013Piston Kit KTA-38-M2Service part / kit
4090029Piston Kit QSK19CEService part / kit
4090181Piston GTA38/19Service part / kit
4097889Piston KTA-38-M2Service part / kit
4910463Piston QSK19R/MService part / kit
4910465Piston QSK SeriesService part / kit
4916177Piston GTA/GQSK19Service part / kit
4918058Piston QSK19CEService part / kit
4922319Piston QSK19CService part / kit
4955233Piston Kit QSK19R/MService part / kit
4955235Piston Kit QSK SeriesService part / kit
4955236Piston Kit QSK19CService part / kit
4955238Piston Kit GTA/GQSK19Service part / kit
501-0520Screw, Cap - Hex Head (3/8-24 x 5/8")Service part / kit
501-0524Washer, Lock - EIT (3/8")Service part / kit
501-0558Line. Flexible - BypassService part / kit
503-1717Elbow, Reducer (45 Deg) (7" ID to 6" ID)Service part / kit
503-1720Insert, Reducer (6" OD to 5-1/2" ID)Service part / kit
503-1730503-0183 21 503-1731 22 505-0324 23 504-0171 24 505-0102 25 505-0132 26 505-0102 27 28 29Service part / kit
504-0028Valve, Radiator DrainService part / kit
505-0007Belt. Drive - Multi Groove (Used with 35 A MP Alternator * Pulley, Alternator - Multi Groove (Use with 75 A MP Alternator)Service part / kit
505-0017Bushing, Pipe – Reducer (3/8" to 1/4")Service part / kit
505-0021Bushing, Pipe - Reducer (3/4º to 1/2º)Service part / kit
505-0100Nipple, Pipe - Close (1/2”)Service part / kit
505-0102Filter. Water - W/Corosion InhibitingService part / kit
505-0117Bushing, Reducer - Flush, Brass (1/2' NPT x3/8° NPT)Service part / kit
505-0132Nipple, Pipe - Close (3/4 NPT x l-3/8"LG) Elbow. Pipe - 90* (3/4 NPT)Service part / kit
505-0376Elbow – 45 Deg (3/8")Service part / kit
508-0015Washer, Insulating - Fiber (#8)Service part / kit
511-0161-02.*Service part / kit
517-0131Capacitor (Used across Voltmeter Terminals on some Sets)Service part / kit
518-0548-42Clamp, Retainer 4 Prior To December 1996 Production (Mounted On Top And Side Of Control Box Wrapper)Service part / kit
526-0030Washer, Flat (3/8")Service part / kit
800-0055Screw, Cap – Hex Head (3/8–16 x 2-1/4")Service part / kit
800-0062Nut, InsulatedService part / kit
800-0094Screw, Cap – Hex Head (1/2–13 x 2")Service part / kit
800-0270DCA4 Service Pre-Charging Complete SystemService part / kit
800-2060Screw, Cap - Hex Head (M8x 1.25 x35)Service part / kit
809-0035Screw, Machine - Thread Cutting, Round Head (#8 X 3/4')Service part / kit
812-0063853-0003 300-2856 338-1836 812-0063 853-0003 300-2863 338-1835 332-1445 NOTE 1 NOTE 2 332Service part / kit
812-0065Screw, Machine - Round Head (#6 - 32 x 5/8')Service part / kit
812-0084Screw. Machine - Round Head (Service part / kit
815-0388Bracket. Mounting - Relay Lead(s), Electrical Wire, Electrical - 20 AW G, Insulated Terminal, Wire - Forked, 18-20 GaugeService part / kit
815-0544Screw, Machine - Round Head IT Washer (#6 - 32 x 1/2')Service part / kit
821-0004Screw, Self-Locking - HexService part / kit
821-0029Screw, Self–Locking – Hex Washer Head (3/8–16 x 3/4")Service part / kit
821-0033Screw, Self–Locking – Hex Washer Head (7/16–14 x 3/4")Service part / kit
821-5004-03Screw, Self-Locking – Hex Washer Head (3/8–16 x 1")Service part / kit
850-0050Washer, Lock - Spring (3/8”)Service part / kit
853-0003Washer, Lock - ET (#6)Service part / kit
856-0008Washer, Lock - EIT (5/16'1)Service part / kit
856-0010Washer, Lock - EIT (3/8')Service part / kit
870-0131Nut. Hex - with ET (#10-32)Service part / kit
870-0196Nut, Insulating (#8)Service part / kit
870-0281Nut, Self-Locking – Hex Washer Head (3/8–16)Service part / kit
900-0181PCC Control Service ManualService part / kit
903-0128NAService part / kit
903-0208NAService part / kit
903-0608NAService part / kit
98-4732CautionService part / kit
98-4798Decal - Caution "7# PSI HOT WATER SYSTEM"Service part / kit
98-5298Decal - Panel Rear Markings (All Control Panels)Service part / kit
98-5299Decal - Panel Rear Markings (All Control Panels)Service part / kit
98-5316Decal - Panel Rear Markings (All Control Panels)Service part / kit
98-5387Nut, Self-Locking - with ET Lockwasher (#10-32)Service part / kit
98-5393Screw, Tapping - Round Head (#8 x 3/4")Service part / kit
98-5822Bushing, Reducer - Flush (1/2 NPT x 3/8 NPT)Service part / kit
98-6108-03Decal - Model IdentificationService part / kit
98-6111-03ONAN GEN SET CUMMINS GEN SETService part / kit
98-6139-03CUMMINS ONAN GEN SETService part / kit
98-6169Terminal Assembly (Includes Replaceable Items 26 thru 29)Service part / kit
F-2375A single line drawing of the prime power systemService part / kit
M-3804747Piston KitService part / kit
68445PIN, GROOVEPin
3628605PLUG, PIPEPipe plug
3628607PLUG, PIPEPipe plug
3178464PLATE, COVERPlate cover
121-0111Drive, PumpPump
159-1451Pump, Fuel TransferPump
3011076SEAL, D RINGSeal
3014668SEAL, D RINGSeal
3081489SEAL, OILSeal
3177556SEAL, RECTANGULAR RINGSeal
508-0292Washer, Sealing - CopperSeal
509-0283-01SealSeal
509-0336Seal, O-RingSeal
509-0337Seal, O-RingSeal
193-0244Sender, Oil Pressure (E1)Sensor
193-0375Sender, CoolantSensor
309-0269Sender, Temperature-Lo EngineSensor
960-0181Service manualService manual
960-0302Service manualService manual
960-0504PCC Control Service ManualService manual
960-0507Detector Control Service ManualService manual
3033853SHAFT, IDLERShaft idler
3175281SHAFT, IDLERShaft idler
205741SHIM, A/R .007 Inch O/SShim
205742SHIM, A/R .008 Inch O/SShim
205743SHIM, A/R .009 Inch O/SShim
205744SHIM, A/R .020 Inch O/SShim
205745SHIM, A/R .031 Inch O/SShim
149-2232Starter - 24 VDCStarter
3000138SUPPORT, BEARINGSupport bearing
309-0649Thermostat (Includes Connector Socket) (S11)Thermostat
3000139BEARING, THRUSTThrust bearing
3001708BEARING, THRUST A/R .010 Inch O/SThrust bearing
3001709BEARING, THRUST A/R .020 Inch O/SThrust bearing
3001710BEARING, THRUST A/R .030 Inch O/SThrust bearing
3001711BEARING, THRUST A/R .040 Inch O/SThrust bearing

Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.

Common questions

What is the oil capacity of the Cummins/Onan KTA 50 G8-I?

The Cummins/Onan KTA 50 G8-I engine has an oil capacity of 177.0 liters.

What is the displacement of the Cummins/Onan KTA 50 G8-I?

The Cummins/Onan KTA 50 G8-I has a displacement of 50.3 liters with 16 cylinders.

Which generators use the Cummins/Onan KTA 50 G8-I engine?

The Cummins/Onan KTA 50 G8-I powers 1 generator set(s), including Cummins/Onan KTA 50 G8-I.