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

Piston pin for GF40 engines

This piston pin is supplied as a replacement item for the GF40 engine range and serves as the cylindrical connector between piston and connecting rod in glow-powered RC engines. The listing describes the unit by model number only and presents it purely as a component for scheduled maintenance and repairs.

Fitment guidance is practical: confirm the pin aligns and slides into the piston and rod without binding, ensure any circlip grooves or retaining features are engaged, and remove any machining debris before final assembly. Use only a light application of lubricant during installation and do not force the part to avoid scoring mating surfaces.

In service terms, the piston pin is part of the control of piston alignment and lateral play. Correct installation helps preserve compression consistency and reduces accelerated wear between the piston and rod, aiding stable engine performance during tuning and inspection routines.