mercury outboard tachometer wiring diagram

• 2023-08-08

Connect a Tachometer to the mercury outboard engine, and add a DC motor to the main shaft of the engine (such as beside the generator). Then measure the voltage and calibrate the corresponding value with a Tachometer. Wiring method of outboard Tachometer, red line, power line of Tachometer. Since the clock of Tachometer needs to work continuously, the red line must be kept powered at all times and can be connected behind the power fuse. Black wire, the ground wire of the Tachometer, can be connected to any ground wire. The yellow line is the working line of the Tachometer. After the yellow line is powered on, each part of the Tachometer starts to work, the light on the panel lights up, and the yellow line is connected to the power line behind the ignition key switch.

Generally speaking, the four wire Tachometer of the mercury outboard engine is a red wire connected to the positive pole of the power supply, a black wire connected to the negative pole of the power supply, a white wire connected to the positive pole of the sensor, and a black blue wire connected to the negative pole of the sensor. It is generally a 12V normal power supply. After the positive and negative poles are connected, a grounding wire is connected to the ignition signal wire of the ignition coil, and a signal wire of the ignition coil is connected to the outside of the ignition coil and connected to the instrument. The specific modification of the meter head depends on how to modify it.

The Tachometer of the mercury outboard engine is generally a pointer type instrument, and a few of them are digital, which reflects the revolutions per minute of the engine crankshaft. The unit name is rpm. Most of the Tachometer of the outboard engine are of the same design. Usually, the mercury outboard Tachometer's indication is multiplied by 1000 or 100 to get the engine Revolutions per minute.

The relationship between speed and speed is not one-to-one, but mainly depends on the speed ratio of the transmission. Usually, we can see that the working range of the pointer is white, and the end of the pointer is red. Red represents danger. Obviously, if our outboard Tachometer pointer enters the red range, it means that the engine running in this speed range is harmful to it.