O.S. Engine OS71530400 crankshaft clamp for 32F 32SX 46SF 46FX 50SX replacement clamp  [OS71530400]

Crankshaft clamp for 32/46/50-series O.S. engines

This crankshaft clamp is an RC-scale engine replacement part designed for use with the listed O.S. Engine model families. It secures the crankshaft assembly within the engine case and is intended as a direct replacement for worn or damaged clamps on compatible glow/nitro model engines.

Fit and compatibility are limited to the models included in the product title: 32F, 32SX, 46SF, 46FX, and 50SX. When servicing your nitro engine, verify the clamp matches the crankshaft flange profile and bearing seating before final assembly. This article does not add or change model compatibility beyond those codes.

Installation notes: remove the engine from the chassis, disassemble the crankcase per your engine’s service manual, inspect crankshaft bearings and the adjoining components for wear, install the clamp ensuring axial alignment, and tighten screws evenly to avoid misalignment. Avoid over-tightening to prevent distortion; if reusing hardware, check thread condition and replace damaged fasteners.

Tuning and maintenance role: a properly seated crankshaft clamp helps maintain crankshaft concentricity and bearing preload, which supports consistent engine timing and performance. Regular inspection during routine maintenance helps catch early wear that can affect combustion stability and drivetrain smoothness in RC applications.