O.S. Engine OS44666100 FSa-56 Pushrod Protection for FS Engines  [OS44666100]

Pushrod Protection for FS-Series Engines

The O.S. Engine OS44666100 FSa-56 pushrod cover is an RC-scale accessory that fits over the pushrod opening of FS-series engines to protect the valve train during assembly and routine servicing. It reduces the chance of dirt or tool contact in the pushrod area when performing hands-on work.

Presented as a replacement or spare for engines that require an FSa-56 style cover, confirm the OS44666100 part number against your engine's service documentation before buying. Fitting is straightforward: position the cover, align the mounting holes, and secure it with the engine's original screws while avoiding excessive torque to prevent thread damage.

The cover will not change engine timing or performance, but it contributes to cleaner tuning sessions and inspections by keeping the pushrod area stable and less exposed to debris, which helps protect small engine parts during needle adjustments and setup work.