Designed for the O.S. Engine FS-120S, this rocker support is supplied as part number OS45561410. The component restores proper rocker alignment and reduces end play that can compromise valve actuation accuracy.
The replacement process is a routine maintenance procedure: remove covers or mounting hardware, fit the OS45561410 support in place of the worn part, then reassemble while confirming rocker motion and clearance. Take care with small-scale parts and follow any engine-specific service steps if available.
As part of setup and tuning, fitting a fresh support improves the stability of valve geometry and helps reduce timing irregularities caused by loose or worn rocker seating. Include it in maintenance cycles when diagnosing ticking or precision adjustment issues.
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