YS Engine YSF1245 Regulator Adjusting Screw - Maintenance Part  [YSF1245]

Adjusting Screw for Regulator Assemblies

This YS Engine YSF1245 part is the replacement regulator adjusting screw designed for use with YS engine regulator assemblies in radio-controlled models. It serves as the adjustable interface between the regulator mechanism and the governor or idle linkage, allowing incremental changes to idle and governor settings without replacing larger components.

Use this screw to replace worn or damaged adjusters, to restore consistent throttle response, or as a spare for field repairs. When fitting, confirm the screw threads and seating location match your regulator assembly, and avoid overtightening. Adjust by small increments and verify engine idle behavior after each change.

For tuning, the adjusting screw provides precise mechanical travel to alter idle stop and governor engagement points. Small turns produce predictable changes, so proceed in measured steps and keep a record of original positions. Regular inspection during routine maintenance helps catch thread wear or deformation early.