DIGITAL GAUGE AND PLUG ADAPTOR Digital dead-point gauge for determining the exact upper dead point for 2- and 4-stroke motors and for absolutely accurate setting of the ignition time. The adjuster is screwed into the candle hole (M14 x 1.25), the upper dead point can be determined by means of the measuring clock. By rotating the crankshaft, the position of the piston in mm before or after OT can now be determined. Indispensable tool for adjusting the ignition time of older, breaker contact controlled ,motors, internal rotor ignitions, PVL HPI, Selettra, Vape etc....