FS Engine Push Rod Cover for FS-series (FSa-155) - OS42566100 by O.S. Engine  [OS42566100]

FS push rod cover overview

This O.S. Engine OS42566100 push rod cover FSa-155 is an RC engine accessory made to fit FS-series engine assemblies. It acts as a targeted replacement to shield the push rod exit area and tidy the engine exterior where push rods pass through the crankcase.

Built for hobby use on FS engine families, the cover defines the service area for routine checks and helps keep push rods routed consistently during setup and tuning. The description explains the part function and is not intended to describe a full engine retrofit.

Fitting is straightforward for those experienced with small glow engine work: remove the head or access cover as your engine service procedure requires, place the cover over the push rod opening, and secure it with the original mounting points and hardware. Take care not to alter timing components when installing and confirm free push rod travel before final tightening.

While running-in and during tuning the cover helps limit debris ingress at the push rod passage and provides a repeatable visual reference for inspections. Examine the cover after heat cycles for cracking or deformation and replace if it interferes with rod movement.