O.S. Engine OS29088320 Mixture Control Valve Assy for 61F and 61G Carburettors  [OS29088320]

Mixture Control Valve Assembly

This Mixture Control Valve Assy is an RC-scale carburettor component intended for use with 61F and 61G carburettors. It serves as the factory-style mixture control interface that affects the air–fuel ratio delivered to the engine, and is presented here as a replacement or service part for model-level tuning and repair.

Installation is straightforward for anyone familiar with carburettor service: remove the carburettor top or cover according to your engine's service procedure, replace the valve assembly in the original location, and confirm linkage or securing hardware is seated correctly. This product is specific to the 61F and 61G carburettor layouts, so fitment should be verified before installation.

During setup and tuning, use small, incremental adjustments to the mixture control and test under controlled conditions. Allow the engine to warm to normal operating temperature before making final mixture changes, and restore any original sealants or thread locking methods recommended by your engine's maintenance guide.

Maintenance notes: inspect the valve assembly for dirt or residue when you service the carburettor, clean with appropriate non-reactive solvents, and replace any sealing components that show wear. Treat this as a model-scale accessory only.