O.S. Engine OS42562000 Cam Shaft FSa-155 cam shaft for FS series RC engines  [OS42562000]

Cam shaft for FS series RC engines

This cam shaft is an RC-scale replacement part identified by the FSa-155 designation and intended for FS series engines produced by O.S. Engine. It serves the mechanical role of controlling valve timing within nitro RC engine assemblies, and is supplied as a direct service or spare component for engine maintenance or tuning work.

Installation typically involves removing the engine head and timing components to access the cam shaft journal, matching timing marks, and verifying valve timing through measured run-in procedures; these steps are standard for FS engine maintenance but should be carried out with the correct tools and basic mechanical care to avoid damage to adjacent parts.

For tuning purposes, the cam shaft affects valve timing characteristics that interact with needle settings and carburetor setup on nitro RC models; when replacing this component, check overall timing and perform incremental adjustments on the engine while monitoring run quality and temperature to achieve the desired response.

Use this cam shaft when replacing worn timing components or when restoring correct valve timing during engine rebuilds, and follow standard FS engine service procedures for best results.