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Home›Kohler›Kohler 125EOZ

Kohler 125EOZ Generator Set

The Kohler 125EOZ is a 125 kW (156 kVA) Diesel standby generator set. It is available at 120/208 V, 120/240 V, 127/220 V, 139/240 V and 277/480 V, 3-phase, 60 Hz and rated 434 A. It holds about 19 L (5.0 gal) of oil and 19 L (5.0 gal) of coolant. Starting uses battery rated 925 CCA at 12 V. The set measures 2068×893×1003 mm (81.4×35.2×39.5 in) and weighs about 1458 kg (3214 lb).

125 kW
Standby
19.0 L
Oil capacity
5
Document types

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Specifications

FuelDiesel
Frequency60.0 Hz
Standby power125 kW
Standby kVA156
Prime power125 kW
EmissionsTier III
ControllerDecision-Maker, Decision-Maker 3+, Decision-Maker 3500, KOHLER-built microprocessor controls
Oil capacity19.0 L
Voltage options120/208 V, 120/240 V, 127/220 V, 139/240 V, 277/480 V
Phase3
Rated current434 A
Battery cranking925 CCA
Battery voltage12- or 24-volt V
Coolant capacity19 L
Dimensions (L×W×H)2068×893×1003 mm
Dry weight1458 kg

Maintenance & consumables

ItemSpecCapacityPart #Interval
Fuel filterPrimary223414 Amazon eBay $24.57
Fuel filterSecondary223953 Amazon eBay $49.90
Oil filter223673 Amazon eBay $6.28

Common questions

What is the power rating of the Kohler 125EOZ?

The Kohler 125EOZ is rated 125 kW standby (156.0 kVA).

What fuel does the Kohler 125EOZ use?

The Kohler 125EOZ runs on Diesel.

Parts

250model family
Part #DescriptionQtySystem
222771Fuel/water separator1Fuel filter Amazon eBay $29.14
222772Seal kit1Seal buy
222773Seal kit1Seal Amazon eBay $40.31
223414Filter, fuel1Fuel filter Amazon eBay $24.57
223419O-ring kit1Seal buy
223461HOSE FITTING1Hose buy
223466O-Ring2Seal buy
223476PackingGasket buy
223512O-ring1Seal buy
223532Gasket1Gasket buy
223583Seal, rear1Seal buy
223604Filter, oil1Oil filter Amazon eBay $35.77
223673Filter, oil1Oil filter Amazon eBay $6.28
223676Thermostat2Thermostat buy
223742O-RING1Seal buy
223746O-ring, 19.177 x 2.464 mm1Seal buy
223757GASKET (was 336503)1Gasket buy
223774Gasket1Gasket buy
223791GASKET1Gasket buy
223850O-RING1Seal buy
223851O-ring, 18.720 x 2.616 mm1Seal buy
223953Filter, fuel1Fuel filter Amazon eBay $49.90
223988O-ring1Seal buy
224035O-ring1Gasket buy
224055Hose1Hose buy
224172O-ring1Seal buy
224243Seal8Seal buy
226915Element, air cleaner1Air filter Amazon eBay $43.43
227257Gauge, oil level1Sensor buy
229051Pump, fuel1Pump buy
229125BELT, SEAWATER PUMP1Belt Amazon eBay $22.07
229678Filter, oil1Oil filter Amazon eBay $21.99
229715Element, fuel1Fuel filter Amazon eBay $11.99
229826IMPELLER REPAIR KIT1Impeller buy
249989BELT1Belt Amazon eBay $19.76
250813Element, fuel1Fuel filter Amazon eBay $15.00
250954Filter, oil1Oil filter Amazon eBay $31.57
252834Filter, oil1Oil filter Amazon eBay $27.95
252898Filter, fuel1Fuel filter Amazon eBay $244.78
253107Element, air cleaner1Air filter Amazon eBay $69.00
253108Element, air cleaner1Air filter Amazon eBay $20.45
254471Element, air cleaner1Air filter Amazon eBay $94.38
255750Pickup, magnetic1Sensor buy
256503BELT1Belt Amazon eBay $12.00
257855Fan, alternator1Alternator buy
258423Element, air cleaner1Air filter Amazon eBay $36.43
258646Element, air cleaner1Air filter Amazon eBay $35.69
264390Sender, oil pressure2Sensor buy
267714Filter, oil1Oil filter Amazon eBay $14.93
267987FILTER, PRIMARY FUEL1Fuel filter Amazon eBay $14.95
268298Sender, water temperature1Sensor buy
272981Air cleaner, industrial1Air filter Amazon eBay $449.00
272982Air cleaner, industrial1Air filter Amazon eBay $68.99
273693O-Ring (1.475” ID)1Seal buy
274545Clamp, Hose, 4.31/4.62 In.2Hose buy
274724Insert, Hose Reducer (4.00” To 3.00”)Hose buy
274821Air cleaner, industrial1Air filter Amazon eBay $49.27
275501Filter, fuel1Fuel filter Amazon eBay $8.13
275527Clamp, Hose, 2.81/3.12 In.1Hose buy
276148BELT1Belt Amazon eBay $65.69
276320Clamp, Hose, 2.38/2.69 In.1Hose buy
277759Element, air cleaner1Air filter Amazon eBay $7.18
278612Element, air cleaner1Air filter Amazon eBay $29.64
278858Element, air cleaner1Air filter Amazon eBay $30.48
279218Filter, oil1Oil filter Amazon eBay $28.88
279260Filter, oil1Oil filter Amazon eBay $17.97
279261Filter, fuel1Fuel filter Amazon eBay $200.00
279262Filter, fuel1Fuel filter Amazon eBay $17.97
279449Filter, oil1Oil filter Amazon eBay $20.00
279736Element, air cleaner1Air filter Amazon eBay $42.99
291537Clamp, Hose, 3.75/4.06 In.2Hose buy
291562Clamp, hose, 5.25/5.56 in.1Hose buy
296755Fitting, tee, hose1Hose buy
322056-SIn-line fuel filter1Fuel filter Amazon eBay $24.95
322536Filter, fuel1Fuel filter Amazon eBay $29.26
324362Mount, Air Cleaner/Exhaust ( 8.50” ID)1Air filter buy
324418Element, air cleaner1Air filter Amazon eBay $23.93
326098Element, air cleaner1Air filter Amazon eBay $200.00
326099Element, air cleaner1Air filter Amazon eBay $49.99
326817Filter, oil1Oil filter Amazon eBay $24.59
328215Filter, fuel1Fuel filter Amazon eBay $19.99
328216Filter, fuel1Fuel filter Amazon eBay $19.97
336458O-ring1Seal buy
336661Filter, fuel1Fuel filter Amazon eBay $12.00
336705Clamp, Hose3Hose buy
337553Connector, hose + Vibra Seal1Hose buy
343219Air cleaner, industrial1Air filter Amazon eBay $78.87
343445Filter, oil1Oil filter Amazon eBay $33.15
344160Valve, siphon break (1.50” hose)1Hose buy
344740Pump, fuel1Pump kuduparts $75.00
352021O-ring2Gasket buy
352022O-ring2Gasket buy
352029Gasket, exhaust1Gasket buy
352031Gasket1Gasket buy
352033Gasket1Gasket buy
352038Bulk Hose1Hose buy
352081Hose, 2100 mm1Hose buy
352092Gasket1Gasket buy
352093Gasket1Gasket buy
352709GASKET1Gasket buy
352737GASKET1Gasket buy
352738GASKET1Gasket buy
354842Air cleaner, industrial1Air filter Amazon eBay $75.00
359771Filter, oil1Oil filter Amazon eBay $22.46
359978IMPELLER REPAIR KIT1Impeller buy
360028Pump, oil1Pump buy
360031Filter, oil1Oil filter Amazon eBay $13.50
360094Gasket, Cylinder Head1Gasket buy
360107O- Ring1Seal buy
360109Water pump adapter1Pump buy
360119O-ring1Seal buy
360123Gasket, oil pan1Gasket buy
360124Gasket, Water Pump1Gasket buy
360130Gasket, oil cooler housing1Gasket atldiesel $38.80
360136Gasket, turbo oil outlet tube1Gasket atldiesel $3.63
360139O-ring4Seal buy
360165O-ring2Seal buy
360170O-ring2Seal buy
360172O-Ring1Seal buy
360174Fitting (order O-ring also)1Seal buy
360176O-ring1Seal buy
360178O-ring1Seal dieselpartscenter $60.24
360180O-ring, 17.3 x 2.2 mm1Seal buy
360181Seal kit, front1Seal buy
360523Oil pump intake1Pump buy
360527Gasket, oil pan1Gasket buy
360531Gasket, cylinder head1Gasket buy
360536Fuel line, no. 11Hose buy
360537Fuel line, no. 21Hose buy
360538Fuel line, no. 31Hose buy
360539Fuel line, no. 41Hose buy
360555O-ring5Seal buy
360557O-ring1Seal buy
360586Gasket kit, cylinder head1Gasket buy
360587Gasket kit, overhaul1Gasket buy
363205BELT1Belt Amazon eBay $3.75
363418Filter, fuel1Fuel filter Amazon eBay $9.10
365012Filter, oil1Oil filter Amazon eBay $69.95
52 050 02-SFILTER, OIL1Oil filter buy
72391PCB ASSY, World Alternator Activator1Alternator buy
ED0021752800-SFILTER, OIL1Oil filter Amazon eBay $22.90
ED0021752850-SFILTER, OIL1Oil filter Amazon eBay $36.35
ED0021752880-SFILTER, SECONDARY FUEL1Fuel filter Amazon eBay $28.71
ED0021753200-SFILTER, SECONDARY FUEL1Fuel filter Amazon eBay $49.97
GC70194-13Alternator AssemblyAlternator buy
GC79429-43Alternator, 4PXAlternator buy
GC79429-44Alternator, 4PXAlternator buy
GC79429-45Alternator, 4PXAlternator buy
GC79454-28Alternator, 4RXAlternator buy
GC79454-29Alternator, 4RXAlternator buy
GC79454-30Alternator, 4RXAlternator buy
GC94676Alternator Assembly, 4UA10 MarineAlternator buy
GM102674-1Hose Clamp Cover 13 mm (1/2 in.)Hose buy
GM102674-2Hose Clamp Cover 8 mm (5/16 in.)Hose buy
GM114093Seal, crankshaft, rear1Seal buy
GM114094Gasket, flywheel housing1Gasket buy
GM11694O-ring, ISO 6149 (15.3mm ID)1Seal buy
GM117328Water pump (Beginning at RG6090L133666 engine serial number)1Pump buy
GM117329Impeller Kit (Use with GM117328)1Impeller Amazon eBay
GM117331Pump Repair Kit (Use with GM117328)1Pump buy
GM117332Pump Repair Kit (Use with GM117328)1Pump buy
GM13224Filter, oil1Oil filter Amazon eBay $60.00
GM13943Filter, oil bypass1Oil filter Amazon eBay
GM13947Filter, fuel1Fuel filter Amazon eBay $79.99
GM13949Filter, oil1Oil filter Amazon eBay
GM14199Air Cleaner Assembly (JD)1Air filter Amazon eBay
GM14200Mount, Air Cleaner (6.76” ID)1Air filter buy
GM15467Connector, hose (90 deg elbow)(Nylon)2Hose buy
GM15506Switch, Liquid Level1Sensor buy
GM16114Filter, oil1Oil filter Amazon eBay
GM16246Connector, Hose1Hose buy
GM16532Filter, oil1Oil filter Amazon eBay
GM16703Filter, oil1Oil filter Amazon eBay $10.00
GM16944Element, air cleaner1Air filter Amazon eBay $49.68
GM17437O-ring1Seal buy
GM17445O-ring1Seal buy
GM17460Gasket1Gasket buy
GM17466Gasket2Gasket buy
GM17471O-ring2Seal buy
GM17472Gasket1Gasket buy
GM17479Gasket1Gasket buy
GM17486Gasket1Gasket buy
GM17487O-ring1Seal buy
GM17492Hose1Hose buy
GM17493Packing1Gasket buy
GM17513Water Pump1Pump buy
GM17521Oil line1Hose buy
GM17527Line1Hose buy
GM17535Injection nozzle4Injector buy
GM17540Fuel pump1Pump buy
GM17542Oil pump intake1Pump buy
GM17549Fuel line1Hose buy
GM17556Hose1Hose buy
GM17557O-ring1Seal buy
GM18681Seal1Seal buy
GM18726Hose1Hose buy
GM18793Impeller Kit1Impeller Amazon eBay $68.63
GM18808FILTER, SECONDARY FUEL1Fuel filter Amazon eBay
GM18821FILTER, PRIMARY FUEL1Fuel filter Amazon eBay $49.99
GM21400Hose1Hose buy
GM21508O-ring1Gasket buy
GM21509Switch, temperature1Sensor buy
GM21515O-ring kitGasket buy
GM21516O-ring kitGasket buy
GM22350Boot, Starter Terminal1Starter buy
GM24540O-ring1Seal buy
GM24543O-ring1Seal buy
GM25430Hose, Seawater (1.25” ID)1Hose buy
GM25435Hose, Seawater (1.25” ID)1Hose buy
GM25504Filter, oil1Oil filter Amazon eBay
GM25506Filter, oil1Oil filter Amazon eBay $35.00
GM25508Filter, oil1Oil filter Amazon eBay $14.95
GM25537Filter, fuel1Fuel filter Amazon eBay FridayParts $32.00
GM25552Fuel/water separator1Fuel filter Amazon eBay $14.99
GM25554Filter, fuel1Fuel filter Amazon eBay $19.99
GM28351Filter, oil1Oil filter Amazon eBay $19.46
GM30594Filter, fuel, secondary1Fuel filter Amazon eBay $60.00
GM30635Connector, Hose1Hose buy
GM32359Filter, fuel1Fuel filter Amazon eBay $26.87
GM32404Element, Air Emissions Filter1Air filter Amazon eBay $97.85
GM32524Clamp, hose2Hose buy
GM32787Seal1Seal buy
GM32809Filter, oil1Oil filter Amazon eBay $42.50
GM32815Line, fuel1Hose buy
GM32816Line, fuel1Hose buy
GM32817Line, fuel1Hose buy
GM32818Line, fuel1Hose buy
GM32830Line, fuel1Hose buy
GM32839Pump, fuel injection1Pump buy
GM32896O-ring1Gasket buy
GM32919Sensor, pressure1Sensor buy
GM32944Kit, Water Pump1Pump buy
GM32955Sensor, coolant temperature1Sensor buy
GM32958Sensor, air temperature1Sensor buy
GM34570FILTER, SECONDARY FUEL1Fuel filter Amazon eBay $23.36
GM35825BELT1Belt Amazon eBay $133.60
GM35826SPARK PLUG4Spark plug Amazon eBay $13.00
GM38523Sender, Temperature1Sensor buy
GM40739Hose, Air Intake1Hose buy
GM46180SPARK PLUG2Spark plug Amazon eBay $15.14
GM46588Gasket1Gasket buy
GM46613Gasket1Gasket buy
GM46631O-Ring4Gasket buy
GM46633Nut (order O-Ring also)4Seal buy
GM46635O-Ring4Gasket buy
GM46641Sensor, Fuel Temp1Sensor buy
GM46643O-Ring1Gasket buy
GM46644O-Ring1Gasket buy
GM46646O-Ring1Gasket buy
GM46675Seal (not shown)4Seal 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

RatingLoadL/hgal/h
Prime25%14.33.8
Prime50%24.76.5
Prime75%36.39.6
Prime100%46.112.2
Standby25%12.73.35
Standby50%19.35.1
Standby75%26.36.95
Standby100%33.98.97

Available documents

BrochureSpec sheetReferenceOwner's manualParts manual