O.S. Engine OS4A406000 Piston Pin GGT10  [OS4A406000]

Piston pin for GGT10

This piston pin is an RC-scale replacement component intended for GGT10-marked O.S. engine assemblies. It serves as the wear interface between piston and connecting rod, so its condition affects piston alignment and smooth reciprocation during engine operation in model applications.

When servicing a glow engine, inspect the piston pin for visible scoring, discoloration, or looseness in the connecting rod bore before reuse. Replace the pin if wear affects fit or movement; a properly fitting pin helps maintain compression and consistent piston travel.

Installation notes: disassemble the piston/connecting rod assembly following your engine's service practice, check circlips or retaining hardware for proper seating, and ensure the pin slides smoothly into the piston and rod bores without excessive play. Use light lubrication compatible with glow engine operation during reassembly and verify rotation before full engine reinstallation.

Tuning role: while small, the piston pin contributes to repeatable piston alignment and therefore consistent engine response after rebuilds or component swaps. Swap pins as part of routine engine rebuilds to remove wear variables when troubleshooting inconsistent performance.