10A/10F Carburettor Slide Valve Guide Screw - O.S. Engine OS21285220  [OS21285220]

10A/10F slide valve guide screw overview

This slide valve guide screw is a compact replacement piece engineered for 10A and 10F carburettors used in RC glow engines. It functions as the guide and end stop for the carburettor slide, keeping travel consistent and helping maintain steady idle and throttle response.

Fitting is straightforward for those experienced with carburettor servicing: remove the carburettor, separate the slide assembly to access the guide screw, replace the worn screw, and reassemble while checking that the slide moves freely. Inspect the slide face and screw engagement to ensure there is no binding; handle the small components carefully during the procedure.

When tuning, the guide screw forms part of the mechanical geometry that affects slide alignment and repeatability. A correctly positioned guide screw supports predictable throttle transitions and makes idle and main-needle adjustments more consistent during setup and track-side changes. Treat this as a model engine service part intended only for RC use.