ELING Guaranteed Fuel Gauge, Fuel Oil Gauge, 0-190ohm, 52mm, 9-32V, Backlit

First, drill a 52mm diameter, 70mm deep hole, then insert and secure the gauge. This universal gauge is compatible with basically any boat or vehicle. However, it must be matched with a sensor of the same signal. It has four wires. The red wire connects to the voltage. The black wire connects to the sensor. The orange wire (backlight) connects to the positive power supply. The blue wire connects to the negative power supply. If you're looking for a sensor with the same signal (0-190ohm), we recommend the following products. (ASIN: B07KPVCBKG, B07KPTLRCG) Red backlight, 9-32VDC (12VDC/24VDC) operating voltage, 100% waterproof and anti-fog protection.