O.S. Engine OS25881100 Carburetor Body 40L 55HZ  [OS25881100]

Replacement carburetor body for nitro RC engines

This O.S. Engine carburetor body serves as a scale replacement for nitro-powered model engine carburettors and housings. The listing shows the size/code 40L 55HZ and model number OS25881100 so hobbyists can verify part compatibility for repairs or rebuilds.

The component functions as the carburettor housing that connects to throttle linkage and jets, so it affects fuel delivery traits, idle stability, and mid-range throttle response. It is supplied as a single spare part intended for maintenance rather than a complete carburettor assembly.

Installation needs basic removal of the carburettor top and careful attention to gasket and needle seating; keep the original jets and needle settings as a starting point and inspect for air leaks after refit. After installation you should re-check idle mixture and throttle transition since a changed body can alter airflow and tuning balance.

Use this part when the original carburettor body is worn or cracked, or when a direct replacement is required to restore tuning and reliable running in nitro RC models.