Push Rod Cover Upgrade for FS Engines FSa-155 OS42566100 by O.S. Engine  [OS42566100]

Protective push rod cover for FS engines

This O.S. Engine OS42566100 push rod cover FSa-155 is an accessory built for FS-series RC engine assemblies. It functions as a replacement cover to protect the push rod exit zone and tidy the crankcase opening where push rods pass through.

Made with hobby maintenance in mind, the cover clarifies the service area on FS engines and supports steady push rod routing during setup and tuning operations. The description clarifies the part role and is not a conversion for complete engine assemblies.

Installation follows common glow engine practices: remove the head or access cover as needed, position the cover over the push rod exit, and secure it with the original fasteners. Avoid changing timing settings while installing and verify unobstructed push rod travel before final tightening.

During running-in and tuning the cover helps keep the push rod passage clear of debris and provides a reliable inspection point. Check after heat cycles for any cracking or distortion and replace the part if it impedes rod movement.