O.S. Engine OS44802000 Crankshaft FSa-81 Replacement Part for RC Engines  [OS44802000]

Overview of the FSa-81 crankshaft by O.S. Engine

The O.S. Engine OS44802000, catalogued as Crankshaft FSa-81, is provided as a replacement for RC engine rebuilds carrying that part code. The text below outlines the checks and procedures model engineers should follow to confirm fit and complete installation.

Only the model number is cited in the source listing, so direct compatibility with specific engine models is not given. Confirm journal sizes, locating features, and stroke orientation before fitting to ensure timing and seal alignment. These checks help prevent sealing or mechanical failures after assembly.

Installation context: use this crankshaft as part of standard refurbishment and tuning workflows. Replace worn bearings and seals, inspect connecting rods for play or fatigue, and observe any indexing marks during reassembly. Follow the engine manufacturer's torque figures where available.

Reserve use of the OS44802000 for engines documented with the FSa-81 code and always verify dimensional compatibility before completing the rebuild.