Specifications
Ratings spec sheet not in our library yet — see the documents below.
Filters & service parts
model family| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Fuel filter | FF5776/FF5825/OEM | 15000 hr | PartsGeek | ||
| Oil filter | LF9070 | 15000 hr | eBay $51.00 PartsGeek | ||
| Coolant filter | 50,000 mi 80,000 km | — | 50000 hr | find | |
| Oil | 30,000 mi 48,000 km | 2.0 | — | 6 hr |
Compiled from this model's family documentation — may include parts for closely-related variants. Confirm the exact part for your serial number.
Common questions
What oil filter does the Cummins/Onan ISX12 use?
The Cummins/Onan ISX12 uses oil filter part number LF9070.
What fuel filter does the Cummins/Onan ISX12 use?
The Cummins/Onan ISX12 uses fuel filter part number FF5776/FF5825/OEM.
Parts
24model family| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 288195800 | Kit, Liner | 6 | Kit | PartsGeek |
| 288196100 | Kit, Main Bearing | 1 | Kit | PartsGeek |
| 2883266 | Liner | Liner | PartsGeek | |
| 430917400 | Kit, Con Rod Bearing | 6 | Kit | PartsGeek |
| 4309391 | Kit, spark plug | 6 | Spark plug | PartsGeek |
| 430939100 | Kit, Spark Plug | 6 | Kit | PartsGeek |
| 4352657 | Piston | Piston | PartsGeek | |
| 437627100 | Kit, Engine Piston | 6 | Kit | PartsGeek |
| 4376466 | Kit, upper engine gasket | 1 | Gasket | PartsGeek |
| 437646600 | Kit, Upper Engine Gasket | 1 | Gasket | PartsGeek |
| 4975069 | Gasket, oil pan | 1 | Gasket | PartsGeek |
| 497506900 | Gasket, Oil Pan | 1 | Gasket | PartsGeek |
| 5467781 | Liner | Liner | PartsGeek | |
| 5472970 | 150mm APR Liner | 1 | Cylinder liner | PartsGeek |
| 5473000 | 152mm APR Liner | 1 | Cylinder liner | PartsGeek |
| 5579425 | Piston Cooling Nozzles | 1 | Pump | PartsGeek |
| CV50626 | Crankcase Breather Element | 1 | Crankcase breather element | PartsGeek |
| CV50633 | Crankcase Breather Element | 1 | Crankcase breather element | PartsGeek |
| FF5776 | Fuel Filter (Pressure) | 1 | Fuel filter | PartsGeek FridayParts $69.00 |
| FF5825 | Fuel Filter (Pressure) | 1 | Fuel filter | PartsGeek |
| LF9070 | Lubricating Oil Filter | 1 | Oil filter | eBay $51.00 PartsGeek |
| 2881961 | Kit, main bearing | 1 | Service part / kit | PartsGeek |
| 4309174 | Kit, con rod bearing | 1 | Service part / kit | PartsGeek |
| 4376271 | Kit, engine piston | 6 | Service part / kit | PartsGeek |
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.
Available documents
Engine spec — 0032396 (Cummins/Onan)Spec sheet — cummins-isx-12-emergency-specsReference — 0032275 (Cummins/Onan)Reference — 0058676Owner's manual — 0032966Parts manual — 0060947Service manual — 0058675Service manual — 0060933 (Cummins/Onan)Service manual — 0064199Service manual — INSITEOverview2018 (Cummins/Onan)