O.S. Engine OS22681306 Set Screw Rotor Stop for 40R,45R,FS,FT engines  [OS22681306]

Service and fitment notes for the rotor stop

This rotor stop set screw from O.S. Engine is a small replacement component intended for RC glow engine care and adjustment. It serves as the mechanical stop that secures rotor indexing on the engine types named in the product title, helping maintain correct rotor alignment during service.

Compatibility is restricted to the model codes shown in the product name: 40R, 45R, FS, FT. Confirm fitment against the engine documentation before attempting installation on any other model.

Installation advice: remove the current rotor stop, inspect the threads and seating area, fit the new set screw and tighten carefully to prevent thread damage. After fitting, verify rotor alignment and carry out a short operational check prior to full use.

Maintenance role: this is a service replacement used when a fastener is lost or worn. Keeping the rotor stop in good condition supports consistent engine operation and reliable maintenance checks.