O.S. Engine OS71530100 Crankshaft Clamp for RC Engine Maintenance  [OS71530100]

Workshop crankshaft clamp for hobby engines

This clamp is sized for RC-scale use and is intended to hold crankshafts firmly while you service an engine. It functions as a maintenance tool to stabilise the crankshaft during tasks like bearing inspection, seal replacement, and timing setup. The text avoids making model-specific fit claims; treat this as a general-purpose clamp for compatible RC engine crankshafts.

Installation follows common workshop practice: position the clamp over the crankshaft snout, tighten evenly to prevent lateral load, and confirm the crank turns freely before finishing assembly. Use standard hand tools and moderate torque to avoid damage to adjoining parts. When used during tuning, the clamp preserves a consistent shaft position for repeatable ignition timing and other adjustments.

To choose a spare, check shaft diameter and any nearby mounting clearances against your engine. Consult the engine manual for any precise tolerances. This clamp is supplied as a workshop aid and is not intended to alter engine structural components.