Description
Fleetguard FS1242 is a spin-on fuel / water separator for Cummins B-series 5.9L and C-series 8.3L engines, replacing Cummins OEM 3355903. Treated cellulose media separates both free and emulsified water from the fuel stream while delivering stable flow to the injection system, and a bottom drain valve allows accumulated water to be removed during routine service.
Specifications
| Manufacturer | Fleetguard (Cummins Filtration) |
|---|---|
| Part Number | FS1242 |
| Part Type | Fuel / water separator, spin-on |
| Engine Compatibility | Cummins B-series 5.9L, C-series 8.3L |
| Thread | 1-14 UNS-2B |
| Outside Diameter | 3.72″ (94.5 mm) |
| Overall Height | 6.89″ (174.9 mm) |
| Drain | Bottom drain valve |
Cross References
This filter replaces or is equivalent to the following part numbers:
- Cummins: 3355903
- Wix: 33242
- Fram: PS6829
- Hastings: FF1017
- Carquest: 86242
- Also known as: Big A 95242
Applications
This fuel / water separator fits the following engines:
- Cummins B-series 5.9L (6BT and ISB-era B engines)
- Cummins C-series 8.3L (6CT and ISC-era C engines)
Verify your engine serial number and existing filter mount before ordering. The FS1242B is a tall-bowl variant of this same family — match the height stamped on your old filter if you are unsure which version your application uses.
