2005 Mercury 115 ELPTO No Spark

Texasmark

Texasmark

Supreme Mariner
Joined
Dec 20, 2005
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Chris1956 said:
Mark, Not that it matters much, but battery/coil ignitions often produce 20K volts. CDi was always much higher. An early aftermarket unit we installed on our 1970 Mercury claimed 600,000 volts. It took the battery voltage and stepped it up to 300V, and then sent it thru the ign coil.
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40.000 unloaded....aka no spark plug attached i what Mercury has been advertising since going to the Capacitor Discharge Ignition systems, for decades. With that voltage potential, while unloaded, the rise time of the pulse will be in single digit microseconds, not in milliseconds like coil/ignition point circuits. Once you install a plug and ground it then the voltage drops to the normal gap voltage....for .035 about 18kv as I recall, but the rise time is still fast because basically its an unloaded circuit till it hits the breakdown voltage of the plug.
 
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