O.S. Engine OS22681306 rotor stop set screw for 40R,45R,FS,FT engine models  [OS22681306]

Rotor stop set screw overview

This rotor stop set screw from O.S. Engine is a small-scale replacement part intended for RC glow engine maintenance and tuning. It is designed to serve as the mechanical stop that secures rotor positioning on compatible engine models listed in the product name, helping retain consistent rotor alignment during service and adjustments.

Compatibility is limited to the model codes shown in the product name: 40R, 45R, FS, FT. Do not assume fitment to other engines or chassis unless the engine documentation explicitly lists these codes.

Installation guidance is practical and concise: remove the existing rotor stop, verify thread engagement and seating, install the replacement set screw and secure it while avoiding over-tightening to prevent thread damage. After installation, perform a basic functional check on the engine rotor position before returning the model to full operation.

Tuning role: this part is a service item used during routine maintenance or when replacing worn or lost fasteners. It helps maintain rotor position stability which supports repeatable engine behavior during bench setups and field tuning.