Which tool is designed to remove gears and bearings from shafts?

The tool specifically designed to remove gears and bearings from shafts is the flywheel puller. This specialized tool provides the necessary leverage and grip to safely attach to the flywheel or gear, allowing the operator to apply force evenly and effectively to pull the component off the shaft without causing damage.

Flywheel pullers typically have a unique design that allows them to fit securely onto the component being removed while providing a means to attach a force source, such as a ratchet or wrench. This ensures that the force applied is directed in a manner that is conducive to safe dislodging of the component.

The other tools mentioned—such as a cylinder leak down gauge, which is used for testing seal integrity in the cylinder, a valve spring compressor, which assists in the installation and removal of valve springs, and a spark tester, which is utilized for diagnosing ignition system issues—serve entirely different functions and do not provide the necessary application for removing gears and bearings. Thus, the flywheel puller is the appropriate tool for this specific task in small engine repair and maintenance.