O.S. Engine OS23108000 O.S. ENGINES DRIVE WASHER 35AX  [OS23108000]

Drive washer for RC engines

This O.S. ENGINES DRIVE WASHER 35AX is an RC-scale drive washer intended for use in O.S. engine drive assemblies that accept the 35AX washer form. It serves as a compact axial spacer inside the crankshaft/drive junction to control endplay and keep drive components aligned during operation.

The description focuses on practical use: the washer provides consistent spacing between the drive hub and adjacent components, helping to stabilise the drive train and reduce uneven wear on mating parts. Use it when reassembling a crankshaft or replacing worn thin spacers to restore correct axial clearance.

Installation is straightforward for experienced RC technicians: remove the drive hub, note alignment and shims, replace the old washer with the 35AX unit, and recheck axial play before final tightening. Verify fitment against the existing parts and rotate the assembly by hand to confirm smooth operation prior to running the engine.

Tuning role: while not an active tuning part, consistent spacer thickness affects driveline geometry and can indirectly influence smoothness and longevity of engine-driven components in RC models.