GT22 Wrist Pin OS28206000 Replacement for GT22 by O.S. Engine  [OS28206000]

Replacement wrist pin for GT22 series

The O.S. Engine OS28206000 piston pin is offered as a replacement wrist pin for GT22-series nitro engines. It joins the piston to the connecting rod and is intended as a service component for regular maintenance and limited tuning of fuel-powered RC engines.

Installation notes: prior to fitting, inspect the piston boss and the small-end bearing or bushing for signs of wear, ensure correct alignment when pressing the pin in, and verify unobstructed piston travel in the cylinder before reassembly. Use light, nitro-compatible lubrication to prevent initial scoring during break-in.

Maintenance and tuning impact: installing a fresh piston pin can tighten piston alignment, reduce side-to-side play, and help protect the cylinder wall from scoring, supporting steady compression and predictable performance through heat cycles. Also assess piston rings and connecting rod condition when replacing the pin.