How to get 12 volts to the coil?
Connect a 12 gauge marine wire from the “I” post on relay to the + post on the coil. That will deliver a full 12 volts to the coil while cranking. If you give Kurt a chance he is likely to post up a photo of the relay. You really only need to do this if you have the points type distributor with the resistor.
Why do I get less voltage at the coil?
Although, even without the resistor, you’ll get still more voltage at the coil since the new wire run is short compared to the wire from the ignition switch – less distance means less voltage drop.
What happens if there is no spark in the ignition coil?
Hence, without this high voltage, there is no spark and, consequently, internal combustion cannot take place within the engine. Simply put, the bottom line is without spark the engine doesn’t run.
How many volts does a 3 foot DC coil lose?
Using a voltage drop calculator, 10 amps @ 12 V dc, 20 foot #10 wire = 6.7% voltage drop = 11.2 volts at the coil; versus a 3 foot run loses 1% = 11.9 volts at the coil.
Connect a 12 gauge marine wire from the “I” post on relay to the + post on the coil. That will deliver a full 12 volts to the coil while cranking. If you give Kurt a chance he is likely to post up a photo of the relay. You really only need to do this if you have the points type distributor with the resistor.
Although, even without the resistor, you’ll get still more voltage at the coil since the new wire run is short compared to the wire from the ignition switch – less distance means less voltage drop.
Is it possible to replace the ignition coil?
Normally, the high secondary voltage produced by an ignition coil is quite powerful. You can replace the secondary coil wire on an engine that uses one with an equal length of vacuum hose and the engine will start and run.
What happens if there is no external signal to the ignition coil?
With no external signal to the coil negative primary post, voltage would travel through the ignition coil windings without inducing any secondary spark. A switch, or signaling device, triggers an interruption in the circuit.