The Cummins/Onan B3.3 engine line groups 4 variant designations. Parts and fitment are pooled here so a cross-reference found on one variant surfaces for the whole family.
| Part # | Description | Category |
|---|---|---|
| 12-0654 | Air Filter | air_filter |
| 12-0661 | Battery | battery |
| 12-0660 | Belt | belt |
| 12-0659 | Coolant Filter | coolant_filter |
| 12-0658 | Fuel Filter | fuel_filter |
| 12-0657 | Oil Filter | oil_filter |
| 12-0662 | Spark Plug | spark_plug |
| A11-TB1-7 | (REMOTE START) | switch |
| S103 | selector switch S103 on the control PCB | switch |
| TB1-6 | terminal (TB1-6) | terminal |
| TB1-7 | terminal (TB1-7) | terminal |
| TB1-8 | terminal (TB1-8) | terminal |
| A11-TB1-6 | run signal out | terminal_block |
| TB1-5 | remote terminal | terminal_block |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.
This engine family also powers 12 generator set(s) on Facts About Generators.