O.S. Engine OS49406010 Piston Pin GF40, piston pin for GF40 RC glow engine  [OS49406010]

Piston pin for GF40 series

This piston pin is an RC-scale replacement part intended for the GF40 engine family and serves as the cylindrical shaft that links the piston to the connecting rod in glow engines. The item is described by model number only, and it is presented here as a component-level part for routine maintenance and repairs on model glow engines.

Fit and installation notes are focused on workshop practice rather than exact measurements: verify the pin sits cleanly in both piston and small end of the rod, confirm retention methods such as circlips or retained bosses are secure, and remove any machining debris before assembly. Use light lubrication during fitting and avoid forcing the pin to prevent scoring the piston or rod.

From a tuning and service perspective, the piston pin contributes to alignment and play control within the piston assembly. A correctly fitted pin helps maintain compression consistency and reduces premature wear between piston and rod, which supports reliable engine performance during engine set-up and inspection routines.