OS Carburettor 21J3(B) W/O Reducer - SCH-OS2AN81002

The OS Engines Carburettor Complete 21J3(B) W/O Reducer is a genuine factory replacement assembly for engines that specify the 21J3(B) carburettor. Supplied without a reducer, this unit is designed to restore precise fuel metering and smooth throttle response when servicing or rebuilding your OS powerplant.

Ideal for routine maintenance or as a direct swap for a worn or damaged unit, this complete carburettor helps keep your model running consistently. Always refer to your engine’s manual or OS Engines documentation for setup, tuning guidance, and suggested compatibility.

Key Information

• Genuine OS Engines replacement part
• Complete 21J3(B) carburettor assembly
• Supplied without reducer
• Part number: SCH-OS2AN81002