Yanmar Tach Light
Moe,On the Yanmar Engine Control Panel, there is a toggle switch. It rests in the 'straight out' position. Momentary push up tests the temp alarm light (when the ignition switch is on). This is done just prior to starting. Fixed position down turns on the Tach illumination light for night operation.Regards,Dick CareyS/V Puffin1990 H-33.5