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

Service Replacement: Mixture Valve

This service mixture control valve assembly fits the 61F and 61G carburettor designs and acts as the adjustable point for controlling the air-fuel mixture fed to the engine. It is intended as a replacement or service component for tuning and repairs at model level.

Installation follows common carburettor service practice: remove the carburettor top or cover in line with the engine's service instructions, fit the valve assembly where the original sat, and check that linkages and securing hardware are correctly located. Confirm the part matches your 61F or 61G carburettor variant before fitting.

When setting up, use conservative incremental adjustments to the mixture control and perform controlled tests. Permit the engine to reach normal operating temperature prior to locking in final mixture settings, and apply any sealants or thread locking materials recommended by the engine maintenance documentation.

Maintenance advice: inspect the valve assembly for dirt or residue when servicing the carburettor, clean with appropriate non-reactive solvents, and replace any sealing components that show wear. This component is for model-scale use only.