O.S. Engine OS22582100 Carburettor Body Replacement for 21L 25AX RC Nitro Engines  [OS22582100]

Replacement carburettor body for 21L and 25AX

This component is the carburettor body produced under the designation OS22582100 by O.S. Engine, supplied as a direct service replacement for carburettors identified as 21L or 25AX. It forms the main housing that maintains throttle and idle circuit alignment.

When fitting a replacement body, assemble on a clean bench and keep small parts grouped to avoid loss. Check the throttle shaft, sealing faces and mounting bosses for wear or burrs before reassembly to ensure correct seating and predictable throttle response on nitro RC engines.

While the body does not change jet sizes, its condition affects how stably the carburettor holds adjustments. Confirm throttle linkage alignment and vacuum or synchronization settings if applicable, and use appropriate fasteners without excessive torque to avoid distorting mounting surfaces.