FS-series Push Rod Guard FSa-155 - OS42566100 for O.S. Engine  [OS42566100]

Cover designed for FS push rod openings

The O.S. Engine OS42566100 push rod cover FSa-155 is supplied as an accessory for FS-series RC engine assemblies. It is intended to protect and neaten the push rod exit area on engines where push rods exit the crankcase.

Suitable for maintenance work on FS-family engines, this cover helps define the service area and maintain tidy push rod routing while adjusting or tuning the engine. The text above describes the part function rather than describing any complete engine conversion.

To fit the cover, follow standard glow engine procedures: remove the head or service cover as required, align the cover over the push rod aperture, and fasten it using the engine's original mounting points and screws. Do not change timing components while fitting and ensure push rods move freely before final torque is applied.

During break-in and routine checks the cover reduces ingress of grime at the push rod passage and offers a consistent inspection reference. Check the part after thermal cycles for any distortion or cracks and replace it if it interferes with push rod travel.