GF40 Piston Pin Replacement for GF40 Engines - OS49406010 by O.S. Engine  [OS49406010]

GF40 series piston pin overview

This piston pin is an RC-scale replacement part made for the GF40 engine family and functions as the cylindrical shaft that joins the piston to the connecting rod in glow engines. The description is limited to the model number and the item is supplied as a component intended for standard maintenance and repair of model glow engines.

Workshop fit notes emphasise practical checks over exact tolerances: ensure the pin seats smoothly in both the piston bore and the rod small end, verify any circlips or retention bosses are correctly engaged, and clear off any swarf before assembly. Apply a light film of suitable lubricant when fitting and avoid forcing the pin so you do not score the piston or rod surfaces.

From a service viewpoint the piston pin helps control alignment and lateral play in the piston assembly. A correctly located pin supports steady compression, helps limit wear between piston and rod, and contributes to dependable engine behaviour while carrying out set-up and inspections.