how to install a tachometer on a mercury outboard

• 2023-03-01

How to install a tachometer on a mercury outboard ? 1. First, connect the red wire in the engine tachometer of a mercury outboard engine to the back of the power fuse. 2. Secondly, connect the black wire in the tachometer to any ground wire. 3. Finally, connect the yellow line in the tachometer to the power line behind the ignition key switch to connect all the sig lines.

The side of the mercury outboard's tachometer does not correspond to the bridge, so a DC motor is added to the main shaft of the engine (such as beside the generator). Then measure its voltage and calibrate the corresponding value with a tachometer. For motorcycles, the wiring is very simple, with only four leads: red, black, yellow and green. The red line is the power line of the tachometer. Because the clock of the tachometer needs to work continuously, the red line must always be powered and can be connected behind the power fuse. The 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, all parts of the tachometer start to work, and the lamp on the panel lights up. The yellow line is connected to the power line behind the ignition key switch. After the key switch is turned on, the tachometer starts to work. The green wire, the signal wire of the tachometer, is connected to the trigger signal terminal of the igniter.

The main engine of the ship is the engine, which is the same as the common engine. Generally, the main engines on board are large low-speed engines, which are basically in the low-speed range. High-speed engine ---- generally refers to the engine with operating speed above 3000 rpm; Medium speed engine - generally refers to the engine with operating speed of 1500~3000 rpm; Low-speed engine - generally refers to operating speed below 1500 rpm; Theoretically, the engine speed can be close to infinitely low, such as steam engine.

It is impossible for the diesel engine to reach 6200 rpm. Generally, the marine engine is at low speed, and 620 rpm should be about the same. Displacement and power are two different things. That is to say, for a 1000-ton ship, there may be three or many engines. How much horsepower can be configured according to customer needs.