GGT10 Crankshaft OS4A402000 Replacement Part for O.S. Engine  [OS4A402000]

Crankshaft Guide for GGT10 Engines

Listed as O.S. Engine CRANKSHAFT GGT10 and marked OS4A402000, this crankshaft fits GGT10 series RC engines and converts piston reciprocation into rotary output in glow engine applications.

The crankshaft plays a key role in rotational balance and must correctly interface with the crankcase, bearings, connecting rod and flywheel. When replacing, inspect mating faces and ball bearings for wear, check axial and radial clearances, and confirm endplay and seal surfaces prior to final assembly. This description assumes RC engine use only.

Fit this crankshaft to restore consistent engine rotation after bearing or crankcase maintenance, and always verify dimensions and clearances on the specific GGT10 engine before running.