no the cdi unit transfers the power from the battery, amplifies it and sends the current to the rest of the machine no the cdi unit transfers the power from the battery, amplifies it and sends the current to the rest of the machine
cdi unit full form
Remove the seat and the battery is located under the CDI box (electronic ignition control, CDI meaning Capacitor Discharge Ignition). The battery is right below this unit which is easily removed. Remove the negative terminal first, then the positive. Getting the battery out is not as easy as it looks. Place your fingers tightly at each top end of the battery and try to lift it. Some people put a lanyard around the battery for fast and easy removal in the future. The lanyard should be thin and can be left in place.
CDI unit (which is the abbreviation of the "Capacitor Discharge Igniter")
Yes, a CDI unit can get off time with the motor. Some of the causes of a damaged CDI unit in a vehicle are bad spark plugs, no oil, and carbon build up.
the only way to test a cdi is to repalce it. There is no other diagnostic for a cdi box
It will not start.
If a CDI (Capacitor Discharge Ignition) unit is broken, the engine may fail to start or run poorly. The CDI unit is responsible for timing the ignition system, so a malfunction can cause misfires, loss of power, or complete engine failure. It is important to replace a faulty CDI unit to restore proper engine function.
To check the CDI (Capacitor Discharge Ignition) box on an ATV, first ensure the ATV is turned off and disconnect the battery for safety. Locate the CDI unit, which is usually found near the engine or under the seat, and inspect it for any visible signs of damage, such as cracks or corrosion. You can also use a multimeter to test the CDI's continuity and resistance according to the manufacturer's specifications. If the CDI appears faulty, it may need to be replaced.
The 1972 model Evinrude has a battery powered ignition system, meaning that battery voltage is needed to power the ignition. Around 1978-79, the CDI ignition was introduced, in which a dual function stator was incorporated, to not only provide voltage to charge the battery, ( which is all the earlier system stator does ), but also supplied voltage to operate the ignition system. With the advent of the CDI system, all the battery was used for is voltage to operate the starter motor. Hence, once the engine was running, the battery was no longer needed. The ADI ( alternator driven ignition ), used in the 1972 model, would not run without continuous voltage that is supplied by the battery. I would suspect a problem with either the battery, or the charging system. Also, ensure that the battery cables are clean and tight at the connections, and in overall servicable condition.
Under floor area in boot of car
behind the battery
You did check the terminal voltage at the light and the voltage across the battery when revving the engine and found it to be correct, I hope. You should also check for tracking between the output terminal of the HT coil and it's positive terminal. After that, its trying to find the bad earth I'm afraid.