O.S. Engine OS71530400 Replacement Crankshaft Clamp - Fits 32F 32SX 46SF 46FX 50SX  [OS71530400]

Direct-fit crankshaft clamp for 32/46/50 O.S. engines

This crankshaft clamp is an aftermarket replacement component designed to fit the O.S. Engine families listed above. It secures the crankshaft within the crankcase and is intended as a straight replacement where the original clamp is worn or damaged.

The clamp’s suitability is limited to the model codes named: 32F, 32SX, 46SF, 46FX, and 50SX. Prior to final installation, verify that the clamp's flange profile and bearing seating match your crankshaft and case. The product listing does not expand compatibility outside those codes.

Fitting instructions: extract the engine from the chassis, split the crankcase as per the engine service manual, inspect bearings and mating faces for wear or scoring, slide the clamp into position ensuring correct axial alignment, and tighten the screws evenly. Avoid over-tightening and replace any compromised fasteners.

Operational note: a correctly seated clamp maintains crankshaft concentricity and bearing preload, which helps stable ignition timing and reduces drivetrain vibration. Include clamp inspection in routine maintenance schedules to maintain engine reliability.