O.S. Engine OS44802000 FSa-81 Crankshaft Replacement for Hobby Engine Overhaul  [OS44802000]

FSa-81 crankshaft details from O.S. Engine OS44802000

The O.S. Engine OS44802000 crankshaft, recorded under the FSa-81 designation, is supplied as a replacement component for scale RC engine rebuilds. The text below helps model builders and service techs check fit, prepare installation, and factor the crankshaft into tuning and maintenance plans.

Only the manufacturer model number is referenced in source data, so explicit engine model fitment is not listed. Prior to installation, confirm journal measurements, locating features, and stroke orientation to ensure proper timing and seal integrity. Precise checks reduce the chance of assembly errors.

Usage context: intended for use during planned engine rebuilds and bench tuning routines. Inspect connecting rods, bearings, and seals for wear and replace items as necessary to prevent further damage. If the original assembly used indexed parts, retain orientation marks and follow recommended torque values for reliable operation.

Use the OS44802000 when the engine parts list or service record shows FSa-81, and always verify dimensional compatibility before completing installation.