How to Read the Dashboard Tachometer?

[OIker]

The method to read the dashboard tachometer: The unit of the tachometer is 1/min×1000, indicating how many thousand revolutions the engine makes per minute. The tachometer displays numbers from 1 to 8, and the reading is obtained by multiplying the number by 1000 revolutions per minute. While driving, try to keep the engine speed above 2000 rpm. If the speed is too low, you may feel insufficient engine power. When the engine runs at low speeds, excessive load can easily lead to carbon buildup, which is harmful to the engine. If the engine speed drops below 1200 rpm during a cold start, it might indicate poor engine condition or severe throttle carbon buildup, requiring a checkup and cleaning at a repair shop. The tachometer is usually located on the instrument panel, symmetrically placed alongside the speedometer. It operates based on magnetic principles, receiving pulse signals generated when the primary current in the ignition coil is interrupted. These signals are then converted into a readable speed value. The faster the engine speed, the more pulses the ignition coil generates, resulting in a higher displayed speed on the tachometer.