FSa-56 Engine Crankcase - OS44601000 Compatible with FSa-56 by O.S. Engine  [OS44601000]

What the FSa-56 Crankcase Does

This crankcase is supplied as the replacement housing for the O.S. Engine FSa-56 series of RC glow engines. It functions as the primary shell that locates the crankshaft, holds bearing seats and provides the mounting points used during engine overhaul and regular maintenance.

Compatibility is centered on the FSa-56 family; check your engine casting and mounting pattern for fit prior to installation. This item is intended only for scale model engines and should not be used in full-size machines.

Fitting pointers: remove the worn case carefully, preserve and index internal parts like the crankpin, bearings and seals, and transfer components following the manufacturer's recommended practice. Do not force components; confirm bearing seating and alignment visually before final assembly. Use the engine maker's torque settings where available.

Tuning impact: the crankcase locates the rotating assembly and influences crankshaft alignment and bearing preload, so correct fitment supports consistent timing and smoother operation during tuning, run-in and repairs. Check mating surfaces for burrs and verify clearances when replacing connected parts.

Use this crankcase when rebuilding or servicing an FSa-56 RC glow engine, and confirm all bearing and seal condition during reassembly for reliable operation.