O.S. Engine OS29701210 GT55 Rotation Sensor Fixing Screw  [OS29701210]

Fixing screw for GT55 RPM sensor mounting

This compact fixing screw is an OEM replacement intended to secure the rotation (RPM) sensor on GT55 model RC glow engines. It is supplied as a service part for engine maintenance and tuning work and is presented here as an RC-scale component.

Install the screw to retain the sensor bracket or pickup at the correct location on the engine housing. Align the pickup and bracket, begin threading the screw by hand to prevent cross-threading, then tighten carefully until the part is seated without deforming adjacent components. Excessive torque can strip threads or damage the sensor assembly.

Within tuning routines the screw has a straightforward function: it stabilizes the sensor so RPM measurements stay repeatable during bench running and on-track checks. Solid fixation lowers the risk of erroneous triggers from vibration and aids consistent setup adjustments.