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

GGT10 piston pin overview

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

During routine service of a glow engine, examine the piston pin for scoring, discoloration, or any looseness in the rod bore before deciding to reuse it. Replace the pin when wear changes the fit or movement; a correctly sized pin helps preserve compression and steady piston travel.

Installation notes: take apart the piston and connecting rod assembly following your engine maintenance practice, verify circlips or retaining parts are seated correctly, and ensure the pin inserts smoothly into the piston and rod bores without excess play. Apply a light lubricant suitable for glow engines during reassembly and check rotation before reinstalling the engine.

Tuning impact: although small, the piston pin affects repeatable piston alignment and therefore consistent engine response after rebuilds or component swaps. Replace pins as part of a standard rebuild to remove wear variables when diagnosing irregular performance.