Replacement Crankshaft Clamp for O.S. Engine OS71530400 (32F/32SX/46SF/46FX/50SX)  [OS71530400]

Crankshaft clamp suitable for O.S. 32/46/50 families

This crankshaft clamp is produced as a replacement part for the specified O.S. Engine model families. It secures the crankshaft assembly inside the case and is meant to substitute worn or damaged original clamps on compatible glow/nitro engines.

Fitment applies only to the model codes listed in the title: 32F, 32SX, 46SF, 46FX, and 50SX. When preparing to fit the clamp, confirm the flange profile and bearing seat dimensions match your crankshaft and case. The item does not broaden compatibility beyond those codes.

Fitting procedure: remove the engine from the model, open the crankcase per the service manual, examine crankshaft runout and bearing surfaces for wear, position the clamp ensuring correct axial alignment, and tighten screws evenly. Replace any fasteners with damaged threads and avoid excessive torque.

Maintenance effect: ensuring the clamp is correctly installed preserves crankshaft concentricity and bearing preload, which supports steady engine timing and smoother drivetrain operation. Regular checks will catch wear that could degrade performance.