OS Carburetor Complete 21J4(B) W/O Reducer

The OS Engines Carburetor Complete 21J4(B) is a genuine factory replacement assembly supplied without a reducer. It is intended for engines specified to use the 21J4(B) carburettor, offering a straightforward like-for-like swap to maintain consistent fuel delivery and tuning performance. For suggested compatibility, please verify against your engine’s manual or parts list using the part number SCH-OS2CH81000.

Key Details

• Complete 21J4(B) carburettor assembly
• Supplied without reducer (reducer not included)
• Genuine O.S. Engines spare part
• Part number: SCH-OS2CH81000
• Suggested compatibility should be checked against your engine documentation

For best results, install in accordance with your engine manufacturer’s instructions and apply baseline needle settings as specified for your engine model.