O.S. Engine OS23102000 Crankshaft for 35AX Series  [OS23102000]

Marked OS23102000, this crankshaft is produced for the O.S. Engine 35AX line and serves as a core rotating assembly part. The following sections cover fit notes, installation checks, and how the crankshaft factors into rebuilds and tuning of RC engines.

Functionally, the crankshaft converts piston motion into rotational drive inside the engine case; treat it as a precision component for hobby engines. Prior to installation, verify the OS23102000 part number against your engine casting and layout to confirm correct bearing alignment and connecting rod interface.

For installation: inspect mating surfaces and clearances, renew seals and bearings when necessary, and tighten retaining hardware to the torque values specified in the engine manual. After assembly perform a proper break-in sequence and re-check for endplay and free rotation.

On tuning: while the crankshaft does not alter ignition timing or fuel settings, imbalance or wear can introduce vibration and reduce bearing life, which in turn can affect engine responsiveness and durability during tuning sessions.