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This intriguing subject brought forth an incredible search of the internet. It turns out the ignition coil transforms voltage from a battery in order to create an electric spark in the spark plugs which leads to the ignition of fuel.
no, the voltage regulater is for charging not the ignition system, it can however drain the battery
Ignition Coil Output Voltage versus a Weak BatteryYes, an ignition coil is nothing more than a dedicated, specialized transformer. As such, the lower the voltage in the primary winding, then the lower the voltage induced in the secondary [output] winding.
When the ignition is turned on, battery voltage passes down the wire to the alternator to 'excite' the alternator when the engine starts. When the engine starts and the alternator generates a voltage, the light is extinguised by the charging voltage cancelling out the battery voltage coming down the wire. If and when the alternator completetly fails the the light will come back on as there is no sancelling voltage. if the alternator produces a voltage lower than the voltage from the ignition switch then the battery light will glow.
The voltage reg is sticking and will run down the battery.
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.
within one volt above or under battery voltage
An ignition coil (also called a spark coil) is an induction coil in a automobile's ignition system which transforms a storage battery's 12 volts to the thousands of volts needed to spark the spark plugs.This specific form of the autotransformer, together with the contact breaker, converts low voltage from a battery into the high voltage required by spark plugs in an internal combustion.source is from http://www.madabout-kitcars.com/kitcar/kb.php?aid=269
The ignition switch may lead to low voltage on a 1994 Chevy Cheyenne with a new alternator and a fairly new battery.
Battery type: YB14L Initial Charging Rate: 1.4A 10 hours Specific Gravity: 1.280 Voltage should be at least 12V DC
check voltage of battery with multymeter,check water leval, specific gravitycheck if battery is too hot while cranking
Never unhook the battery with the ignition turned on. There is always a little voltage spike that occurs when disconnecting or reconnecting the battery. If the ignition is on the computer will be powered up and that spike could "fry" the computer.