O.S. Engine OS25881100 carburetor body 40L 55HZ  [OS25881100]

Carburetor body for nitro RC cars

This O.S. Engine carburetor body is an RC-scale replacement part intended for use within nitro-powered model engines and carburettor assemblies. The listing identifies the unit by its size/code 40L 55HZ and model number OS25881100, the information hobbyists need when matching parts for repair or rebuild.

The component functions as the carburettor housing that interfaces with throttle linkage and jets, so it plays a role in fuel delivery characteristics, idle stability, and mid-range throttle response. It is supplied as a single spare part for hobby maintenance rather than a complete carburettor kit.

Installation requires basic disassembly of the carburettor top and attention to gasket and needle seating; use the original jets and needle settings as a baseline and verify for air leaks after refit. During setup expect to re-check idle mixture and throttle transition since changing the body can affect airflow and tuning balance.

Use this part when the original carburettor body is worn, cracked, or when a like-for-like replacement is required for continued tuning and reliability of nitro RC models.