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

OS22582100 carburettor housing for 21L and 25AX units

The OS22582100 body from O.S. Engine is designed to replace the main housing on carburettors marked 21L or 25AX, defining throttle and idle circuit geometry and mounting points. It provides the core structure for the carburettor assembly.

Perform the replacement on a tidy bench and keep small components secured in containers. Before final assembly, inspect shafts, gasket surfaces and bosses for wear, and remove any burrs that could affect sealing or throttle operation.

The body will not modify jet sizes, but a correctly seated and undamaged housing helps the carburettor retain its adjustments. Verify throttle linkage alignment and vacuum/synchronisation arrangements where relevant, and tighten fasteners evenly to prevent surface distortion.