HomeEnginesCummins/Onan 6CT8.3-G

Cummins/Onan 6CT8.3-G Engine Engine

The Cummins/Onan 6CT8.3-G is a 8.3 L 6-cylinder engine, producing up to 100 kW. It powers generator sets from Cummins/Onan, including the 100DGEA, 125 DGEA and DGEA. It holds 19 L (5.0 gal) of oil and 26 L (6.9 gal) of coolant.

Also known as: Cummins 6CT8.3-G

Part of the Cummins/Onan 6CT8.3 engine family — 4 variants share parts & fitment.

8.3 L
Displacement
6
Cylinders
100 kW
Gross power
19.0 L
Oil capacity

Engine specifications

Oil capacity19.0 L
Coolant capacity26.0 L
Displacement8.3 L
Cylinders6
Gross power100 kW

Parts cataloged across the Cummins/Onan 6CT8.3 family

37
Part #DescriptionCategory
140-2240Cleaner, Air - Includes Element(s)air_filter
140-2241Element, Air Cleaner - Standard (Outer)air_filter
140-2252Element, Air Cleaner - Heavy Duty (Inner)air_filter
B-45CHECKING BATTERYbattery
2278784Fuel pump-governor combinationfuel_filter
DM-3801373Gasket Set - 6CT 8.3gasket
FP-6C83PREM6C/6CT8.3 In-Frame Kit w/upper gasket set & oil pan gasketgasket
FP-IFK6C83PREM6C/6CT8.3 In-Frame Kit w/upper gasket set & oil pan gasketgasket
502-1265Hose, Drainhose
503-0183Clamp, Hosehose
DM-3928389Fuel Injector - 6CT 8.3injector
19507Allison 4-Speed Trans Oil Changeoil
30363Allison 6-Speed Trans Oil Changeoil
19095Oil & Filter Changeoil_filter
19096Oil & Filter Change, Fuel Filteroil_filter
LF3000Lube, Spin-Onoil_filter
LS1174sOIL FILTERoil_filter
19097Complete Serviceother_service
19098Complete Service & Checkother_service
19472Change Differential Oilother_service
850-2008Heater, Engine Coolantother_service
DM-3802010Main Bearing Set Standard - 4BT 3.9, 6BT 5.9, 6CT 8.3other_service
DM-3802439Piston Ring Set - 6CT 8.3other_service
FP-33568246C/6CT8.3 In-Frame Kit (contains FP-3802403 Cyl Kit)other_service
FP-33568256C/6CT8.3 In-Frame Kit (contains FP-3802404 Cyl Kit)other_service
FP-33568266C/6CT8.3 In-Frame Kit (contains FP-3802406 Cyl Kit)other_service
FP-33568276C/6CT8.3 In-Frame Kit (contains FP-LK92479937 Cyl Kit)other_service
FP-33575736C/6CT8.3 In-Frame Kit (contains FP-3802263 Piston Kit)other_service
FP-33575746C/6CT8.3 In-Frame Kit (contains FP-3802601 Piston Kit)other_service
FP-33578036C/6CT8.3 In-Frame Kit (contains FP-3802344 Piston Kit)other_service
M-5316172Valve Springother_service
M-5316173Valve Springother_service
308-0913Kit, Repair - Fuel Tank Pump (includes Lip Seal, Bearings, Gasket, Drive Gear, Idle Gear, Coupler)pump
399-0117Pump, Fuel Tank (P103)pump
193-0448Sender, Oil Pressure (Includes Parts Marked *)sensor
309-0553Switch, Temperature - Low Engine Coolant (S4)sensor
309-0554Switch, Oil Pressure - 20 PSI (S5 Pre-Alarm)sensor

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 6CT8.3-G?

The Cummins/Onan 6CT8.3-G engine has an oil capacity of 19.0 liters.

What is the displacement of the Cummins/Onan 6CT8.3-G?

The Cummins/Onan 6CT8.3-G has a displacement of 8.3 liters with 6 cylinders.

Which generators use the Cummins/Onan 6CT8.3-G engine?

The Cummins/Onan 6CT8.3-G powers 3 generator set(s), including Cummins/Onan 100DGEA, Cummins/Onan 125 DGEA, Cummins/Onan DGEA.