FSa-110 Compatible Piston Pin OS44906000 O.S. Engine  [OS44906000]

Service piston pin for FSa-110 units

Supplied as a replacement for piston assemblies marked FSa-110, this piston pin secures the piston to the connecting wrist pin area and permits correct articulation within the engine.

Fitment is limited to assemblies that reference FSa-110; always verify the service markings on the piston and rod before installation. This item is offered as a spare part specific to that piston family, not a generic solution.

Installation checklist: remove the piston from the sleeve and assess bores for scoring or deformation, line up piston and rod bores, press the pin in until it sits flush with the piston faces, and confirm smooth, unrestricted piston movement. If you encounter binding or visible damage, stop and inspect mating surfaces before proceeding.

Maintenance perspective: although small, the piston pin is key to maintaining correct piston travel and ring alignment; renewing worn pins during rebuilds helps preserve compression and prevents uneven wear on piston and cylinder components.