O.S. Engine OS29181610 Mixture Control Valve Assembly for 60M-C 91SZ-H carburettor parts  [OS29181610]

Mixture control valve assembly

This Mixture Control Valve Assembly from O.S. Engine is a direct replacement part specified for use with 60M-C and 91SZ-H carburettors on RC glow engines. It serves as the interface for adjusting fuel/air mixture and idle behavior without altering the carburettor body.

Fitment: confirm the 60M-C or 91SZ-H carburettor form factor before installation, since the valve is intended to match those carburettor housings and linkage points. Use standard hobby tools to remove the carburettor from the engine, swap the valve assembly, and verify smooth throttle movement before reinstallation.

Tuning role: this valve assembly controls mixture response and idle stability. Minor adjustments to mixture settings will affect throttle transition and low-RPM behavior, so perform changes incrementally and test on the bench or run stand prior to track use.

Maintenance tips: inspect linkage and sealing surfaces for wear, keep passages clear of varnish or debris, and replace worn gaskets when servicing the carburettor to maintain predictable mixture control.