O.S. Engine FS-120S Rocker Support Assembly OS45561401  [OS45561401]

Valve-Train Support for FS-120S Engines

The O.S. Engine OS45561401 Rocker Support Assembly FS-120S is a replacement part intended to restore correct rocker alignment on the FS-120S engine range. It provides the structural mounting for the rocker assembly so valve actuation remains consistent during normal use.

During engine servicing, this support positions the rocker shaft and interfaces with the cylinder head. Its role is to offer a stable platform for rocker components so tappet contact and valve timing stay predictable after reassembly.

Installation notes: replace the original rocker support on FS-120S units by attaching this assembly at the factory mounting points with the correct hardware. This item is intended for maintenance and alignment and is not a direct performance upgrade.

Fit this assembly when carrying out shop-level repairs or rebuilds on an FS-120S to ensure rocker alignment and dependable valve operation after the job is completed.