Service parts for the 125ERES
Grouped by system, with how many of each the parts manual calls for.
Air intake
1 requiredFuel system
1 requiredBelts
1 requiredElectrical
1 requiredIgnition
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
| Fuel | LPG |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 105 kW |
| Standby kVA | 160 |
| Emissions | EPA NSPS |
| Controller | APM402, Decision-Maker 3000, Decision-Maker 550 |
| Oil capacity | 8.0 L |
| Alternator | Fast-Response II (FRII) |
| Voltage options | 120/240 V |
| Phase | 1 |
| Rated current | 469 A |
| Power factor | 0.8 |
| Battery group | 1 |
| Battery cranking | 630 CCA |
| Battery voltage | 12 V |
| Battery quantity | 1 |
| Coolant capacity | 27.6 L |
| Engine jacket water | 13.4 L |
| Max ambient | 45 °C |
| Dimensions (L×W×H) | 3506×1156×1697 mm |
| Sound level | 73.0 dBA @ 7 m |
Engine
| Oil capacity | 7.6 L |
|---|---|
| Coolant capacity | 13.7 L |
| Displacement | 8.8 L |
| Aspiration | Turbo Charge Air Cooled |
| Rated speed | 1800 rpm |
Same engine, other brands
1 brandThe Power Solutions International 8.8L Industrial Powertrain in this set also powers 1 generator set sold under 1 other brand. Service parts and maintenance intervals for the engine are shared; enclosure, alternator, controller and ratings are not.
| Brand | Models |
|---|---|
| Cummins/Onan | GFPA |
Maintenance & consumables
for the Power Solutions International 8.8L Industrial Powertrain| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Inspect air cleaner, Replace air cleaner element | 253107 | 200 hr | Amazon eBay $69.00 NAPA $55.23 | |
| Fuel filter | Replace fuel filter | 343302 | 3652 hr | Amazon eBay | |
| Oil filter | Change engine oil and filter | GM16703 | 150 hr | Amazon eBay $58.00 NAPA $3.59 | |
| Battery | 1/12V, 650CCA, Wet | 256985 | Amazon eBay | ||
| Belt | GM16132 | Amazon eBay $86.00 | |||
| Coolant | Closed-Loop Radiator System | 49.2 L | — | ||
| Oil | 8.5 L | — | 150 hr | ||
| Spark plug | Replace spark plugs | GM38998 | 3652 hr | Amazon eBay |
Service specifications
34| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Torque | 1-12 fastener | 283.0 (209) | Nm (ft. lb.) | Assembled into cast iron or steel, Grade 2 or 5 |
| Torque | 1-8 fastener | 259.0 (191) | Nm (ft. lb.) | Assembled into cast iron or steel, Grade 2 or 5 |
| Torque | 1/2-13 fastener | 60.0 (44) | Nm (ft. lb.) | Assembled into cast iron or steel, Grade 2 or 5 |
| Torque | 1/2-20 fastener | 66.0 (49) | Nm (ft. lb.) | Assembled into cast iron or steel, Grade 2 or 5 |
| Torque | 1/4-20 fastener | 6.8 (60) | Nm (in. lb.) | Assembled into cast iron or steel, Grade 2 or 5 |
| Torque | 1/4-28 fastener | 8.1 (72) | Nm (in. lb.) | Assembled into cast iron or steel, Grade 2 or 5 |
| Torque | 10-24 fastener | 2.9 (26) | Nm (in. lb.) | Assembled into cast iron or steel, Grade 2 or 5 |
| Torque | 10-32 fastener | 2.9 (26) | Nm (in. lb.) | Assembled into cast iron or steel, Grade 2 or 5 |
| Torque | 3/4-10 fastener | 199.0 (147) | Nm (ft. lb.) | Assembled into cast iron or steel, Grade 2 or 5 |
| Torque | 3/4-16 fastener | 222.0 (164) | Nm (ft. lb.) | Assembled into cast iron or steel, Grade 2 or 5 |
| Torque | 3/8-16 fastener | 24.0 (18) | Nm (ft. lb.) | Assembled into cast iron or steel, Grade 2 or 5 |
| Torque | 3/8-24 fastener | 27.0 (20) | Nm (ft. lb.) | Assembled into cast iron or steel, Grade 2 or 5 |
| Torque | 5/16-18 fastener | 13.6 (120) | Nm (in. lb.) | Assembled into cast iron or steel, Grade 2 or 5 |
| Torque | 5/16-24 fastener | 14.9 (132) | Nm (in. lb.) | Assembled into cast iron or steel, Grade 2 or 5 |
| Torque | 5/8-11 fastener | 113.0 (83) | Nm (ft. lb.) | Assembled into cast iron or steel, Grade 2 or 5 |
| Torque | 5/8-18 fastener | 128.0 (94) | Nm (ft. lb.) | Assembled into cast iron or steel, Grade 2 or 5 |
| Torque | 7/16-14 fastener | 39.0 (29) | Nm (ft. lb.) | Assembled into cast iron or steel, Grade 2 or 5 |
| Torque | 7/16-20 fastener | 43.0 (32) | Nm (ft. lb.) | Assembled into cast iron or steel, Grade 2 or 5 |
| Torque | 8-32 fastener | 1.8 (16) | Nm (in. lb.) | Assembled into cast iron or steel, Grade 2 or 5 |
| Torque | 9/16-12 fastener | 81.0 (60) | Nm (ft. lb.) | Assembled into cast iron or steel, Grade 2 or 5 |
| Torque | 9/16-18 fastener | 91.0 (67) | Nm (ft. lb.) | Assembled into cast iron or steel, Grade 2 or 5 |
| Torque | M10 x 1.25 fastener | 31.0 (23) | Nm (ft. lb.) | Assembled into cast iron or steel, Grade 5.8 or 8.8 |
| Torque | M10 x 1.50 fastener | 30.0 (22) | Nm (ft. lb.) | Assembled into cast iron or steel, Grade 5.8 or 8.8 |
| Torque | M12 x 1.50 fastener | 56.0 (41) | Nm (ft. lb.) | Assembled into cast iron or steel, Grade 5.8 or 8.8 |
| Torque | M12 x 1.75 fastener | 53.0 (39) | Nm (ft. lb.) | Assembled into cast iron or steel, Grade 5.8 or 8.8 |
| Torque | M14 x 1.50 fastener | 87.0 (64) | Nm (ft. lb.) | Assembled into cast iron or steel, Grade 5.8 or 8.8 |
| Torque | M14 x 2.00 fastener | 83.0 (61) | Nm (ft. lb.) | Assembled into cast iron or steel, Grade 5.8 or 8.8 |
| Torque | M16 x 1.50 fastener | 132.0 (97) | Nm (ft. lb.) | Assembled into cast iron or steel, Grade 5.8 or 8.8 |
| Torque | M16 x 2.00 fastener | 127.0 (94) | Nm (ft. lb.) | Assembled into cast iron or steel, Grade 5.8 or 8.8 |
| Torque | M18 x 1.50 fastener | 189.0 (140) | Nm (ft. lb.) | Assembled into cast iron or steel, Grade 5.8 or 8.8 |
| Torque | M18 x 2.50 fastener | 179.0 (132) | Nm (ft. lb.) | Assembled into cast iron or steel, Grade 5.8 or 8.8 |
| Torque | M6 x 1.00 fastener | 6.2 (4.6) | Nm (ft. lb.) | Assembled into cast iron or steel, Grade 5.8 or 8.8 |
| Torque | M8 x 1.00 fastener | 16.0 (11) | Nm (ft. lb.) | Assembled into cast iron or steel, Grade 5.8 or 8.8 |
| Torque | M8 x 1.25 fastener | 15.0 (11) | Nm (ft. lb.) | Assembled into cast iron or steel, Grade 5.8 or 8.8 |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Procedures
2Common Hardware Application installation
- Determine entry hole type: round or slotted.
- Determine exit hole type: fixed female thread (weld nut), round, or slotted.
- For round and slotted exit holes, determine if hardware is greater than 1/2 inch in diameter.
- Hardware greater than 1/2 inch in diameter uses a standard nut and SAE washer.
- Hardware 1/2 inch or less in diameter can use a properly torqued whiz nut or spiralock nut.
- Always use a washer between hardware and a slot.
- Always use a washer under a nut.
- Use a washer under a bolt when the female thread is fixed (weld nut).
How to Find Part Numbers operation
- Locate the generator set nameplate to identify the generator set spec number.
- Locate the second nameplate listing accessories to identify installed modules; on some models it is inside the junction box.
- Turn to the Specification Number Index; the first column lists generator set spec numbers.
- Identify the group most likely to include the service part number.
- Find the group variation number at the intersection of the spec number row and group column.
- Page forward to locate that group or find the page in the Table of Contents.
- Find the part on the illustration and note the item number, or find the part description in the parts list.
- Select the part number that corresponds to your group variation using the column on the right side of the parts list table.
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Voltage reconnection
| Voltage | Phase | Connection | Leads | Notes |
|---|---|---|---|---|
| Alternator Reconnection drawing ADV-5875U--1 | 4 | 4--Lead |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Common questions
How many kW is the Kohler 125ERES?
The Kohler 125ERES is rated 105 kW standby (160.0 kVA).
What engine is in the Kohler 125ERES?
The Kohler 125ERES is powered by the Power Solutions International 8.8L Industrial Powertrain engine.
What fuel type does the Kohler 125ERES take?
The Kohler 125ERES runs on LPG.
What is the oil capacity of the Kohler 125ERES?
The Power Solutions International 8.8L Industrial Powertrain engine in the Kohler 125ERES has an oil capacity of 7.6 liters.
What is the coolant capacity of the Kohler 125ERES?
The Kohler 125ERES cooling system holds 27.6 liters (7.3 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.
What is the sound level of the Kohler 125ERES?
The Kohler 125ERES is rated at 73.0 dBA at 7 m, per the manufacturer specification sheet.
What voltage does the Kohler 125ERES produce?
The Kohler 125ERES is offered in 120/240 V, 1-phase.
What battery does the Kohler 125ERES use?
The Kohler 125ERES uses 1 battery, 12 V each, 630 CCA, group 1, per the manufacturer specification sheet.
What alternator comes on the Kohler 125ERES?
The Kohler 125ERES uses a Fast-Response II (FRII) alternator.
What oil filter fits the Kohler 125ERES?
The Kohler 125ERES uses oil filter part number GM16703.
What fuel filter fits the Kohler 125ERES?
The Kohler 125ERES uses fuel filter part number 343302.
What air filter fits the Kohler 125ERES?
The Kohler 125ERES uses air filter part number 253107.
Parts
43| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 250081 | Clamp, hose (2) | Hose | Amazon eBay | |
| 253104 | Air filter | Air filter | Amazon eBay | |
| 253107 | Element, Air Cleaner | 1 | Air filter | Amazon eBay $69.00 NAPA $55.23 |
| 273113 | Gasket–Intake | 1 | Sensor | Amazon eBay |
| 291542 | Air filter | Air filter | Amazon eBay | |
| 328006 | Hose, reducer (3.00 in. to 2.50 in. ID) | 1 | Hose | Amazon eBay |
| 359249 | Hose, 45 deg. elbow (3.00 in. ID) | 1 | Air filter | Amazon eBay |
| GM14200 | Mount, Air Cleaner ( 6.76”ID) | 1 | Air filter | Amazon eBay |
| GM16132 | Belt, fan standard | 1 | Belt | Amazon eBay $86.00 |
| GM16531 | Spark plug | 1 | Spark plug | Amazon eBay $8.08 NAPA $5.38 |
| GM16537 | Thermostat, 160 degree | 1 | Oil filter | Amazon eBay $22.50 |
| GM16703 | Filter, oil | 1 | Oil filter | Amazon eBay $58.00 NAPA $3.59 |
| GM19721 | Gasket, exhaust manifold | 2 | Gasket | Amazon |
| GM19726 | Thermostat | 1 | Thermostat | Amazon eBay |
| GM22171 | Spark plug | 8 | Spark plug | Amazon eBay |
| GM28351 | Filter, oil | 1 | Oil filter | Amazon eBay $19.46 NAPA $9.09 |
| GM38998 | Spark plug | 1 | Spark plug | Amazon eBay |
| GM39428 | Belt, alternator | 1 | Belt | Amazon eBay $15.00 |
| GM42034 | Filter, oil | 1 | Oil filter | Amazon eBay $41.00 |
| GM62308 | Air Cleaner Assy | 1 | Air filter | Amazon eBay |
| GM62309 | Element, air cleaner | 1 | Air filter | Amazon eBay $91.00 |
| GM65427 | Belt, alternator | 1 | Belt | Amazon eBay $79.00 |
| GM66205 | Oil filter | 1 | Oil filter | Amazon eBay |
| GM66788 | Air filter | Air filter | Amazon eBay | |
| GM67400 | Air filter | Air filter | Amazon eBay | |
| GM69285 | Hose, Air Intake | 1 | Hose | Amazon eBay |
| GM69427 | Air filter | Air filter | Amazon eBay | |
| GM87592 | Oil filter | 1 | Oil filter | Amazon eBay $37.50 NAPA $9.64 |
| GM87608 | Spark plug | 8 | Spark plug | Amazon eBay $60.00 |
| GM90280 | Air Cleaner Assy | 1 | Air filter | Amazon eBay |
| GM90281 | Element, Air Cleaner | 1 | Air filter | Amazon eBay $40.00 NAPA $66.17 KuduParts $43.00 |
| GM90680 | Air filter | Air filter | Amazon eBay | |
| GM90681 | Air filter | Air filter | Amazon eBay | |
| GM90682 | Air filter | Air filter | Amazon eBay | |
| GM92063-S | Maintenance Kit | Maintenance kit | Amazon eBay | |
| GM92099-S | Maintenance Kit | Maintenance kit | Amazon eBay | |
| GM92138 | Air filter | Air filter | Amazon eBay | |
| GM92140 | Air filter | Air filter | Amazon eBay | |
| M125A | Air filter | Air filter | Amazon eBay | |
| M6923 | Air filter | Air filter | Amazon eBay | |
| M933 | Air filter | Air filter | Amazon eBay | |
| 08020 | F1805 | Service part / kit | Amazon eBay NAPA $152.42 KuduParts $340.00 | |
| GM101824 | 5.7L breather retrofit kit (not fully specified) | 1 | Service part / kit | Amazon eBay |
Service, wear & replacement parts referenced for this model and its engine — confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.
Fuel consumption
| Rating | Load | L/h | gal/h |
|---|---|---|---|
| Standby | 3.7 | 0.98 |
Available documents
Spec sheet (Kohler)Spec sheet — 125ERESB-Kohler-Residential-Generator (Kohler)Reference (Kohler)Reference — RES Consumer Referral Rebate (Kohler)Reference — Referral Rebate Form EDITABLE (Kohler)Parts manual — Kohler 2017 Referral Rebate Consumer RES (Kohler)Parts manual — Kohler 2019 RES Consumer Referral Rebate (Kohler)Parts manual — tp6667 (Kohler)Service manual — 8.1L Crankcase Heater KIT tt1560 (Kohler)Service manual — cold weather kit tt1723 (Kohler)Service manual — sb720 (Kohler)Service manual — sb735 (Kohler)Service manual — tp6791 (Kohler)Service manual — tt1723 (Kohler)
This page was generated from the 14 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.