Replacement Crankcase OS44601000 for O.S. Engine FSa-56  [OS44601000]

Overview: Crankcase for FSa-56 Series

This component is the replacement crankcase supplied for the O.S. Engine FSa-56 line of RC glow engines. It forms the main shell that locates the crankshaft, supports bearing seats and provides the mounting points required during rebuilds and routine servicing.

The part is intended for the FSa-56 engine family; always confirm compatibility with your engine casting and mounting pattern prior to installation. It is designed for model engine use and not for use in full-size equipment.

Fitting advice: carefully remove the original case, keep internal parts like the crankpin, bearings and seals clean and properly indexed, and transfer components following recommended practice. Avoid forcing parts; visually confirm bearing seating and alignment before final tightening. Refer to the engine maker's torque guidance where provided.

Role in tuning and service: the crankcase sets the rotary assembly position and influences crankshaft alignment and bearing preload. A correctly fitted case helps maintain stable timing and efficient performance during tuning, running-in and repairs. Inspect mating faces and confirm clearances when installing replacement parts.

Select this crankcase for restoring or maintaining an FSa-56 RC glow engine, and always check bearings and seals during reassembly to preserve dependable function.