Carburettor Body OS22582100 for 21L 25AX by O.S. Engine  [OS22582100]

O.S. Engine OS22582100 carburettor housing overview

The OS22582100 carburettor body from O.S. Engine is supplied to replace worn or damaged housings on carburettors marked 21L and 25AX. It provides the core mounting structure and alignment for throttle and idle circuits.

Carry out the swap in a clean area and keep screws and small parts organised to prevent loss. Inspect throttle shaft bearings, sealing surfaces and mounting bosses; remove any burrs or damage before final assembly to ensure consistent throttle feel.

Although the body does not alter the jets, its condition influences how steady the carburettor holds tuning. Confirm linkage geometry and any vacuum or synchronization arrangements, and use correct fastener practice to avoid distorting the body.