GT22 Crankshaft Drive Washer - OS28208000 by O.S. Engine  [OS28208000]

This drive washer is a precision crankshaft spacer designed to provide accurate axial spacing on GT22 engine assemblies. It acts as a thin spacer that helps control endplay and keeps the crankshaft aligned with the engine case and connected drive parts.

For installation check mating surfaces for burrs, slide the washer onto the crankshaft seating face, and verify endplay while rotating the assembly. Small changes in washer placement can influence timing cover clearance and spur/pinion mesh on models using GT22-class engines.

Use steady hands when fitting and confirm even contact around the crankshaft journal to avoid introducing tilt or misalignment. The washer is intended for hobby-grade nitro RC engines and should be handled as a precision engine component rather than general hardware.