This throttle stop screw from O.S. Engine (OS23818500) is an RC-scale carburettor component intended for fine idle and throttle-end adjustment on compatible O.S. carburettor models. It serves as the mechanical limit for the throttle barrel or arm, helping maintain a repeatable idle setting and supporting consistent throttle response during tuning sessions.
Use this part when you need a direct replacement for a worn or missing throttle stop screw on the listed carburettor codes, or when making small trim changes during engine set-up. Installation is straightforward: remove the old stop screw, verify the seating and thread condition in the carburettor body, and fit the replacement ensuring the throttle returns smoothly to the set stop without binding.
Practical notes for tuning: adjust the screw in small increments and test idle and transition under load on the model, not on a full-size engine, to avoid over-tightening and to preserve throttle travel for safe operation.
Copyright © 2008-2026 rcjaz.com All rights reserved
