4 coils Versus 2 coils with double output

[coteno47]

My Merc 2012 4 strokes 60hp has 2 coils with double output (top coil for cylinder #2 and # 3) (bottom coil for #1 and # 4).
Firing order 1-3-4-2.
Before 2005 those engine had 4 coils, one per cylinder, easy to understand.

Can a pros explain me and other the reason of this design improvement and the basic functioning.

With the double output coil are we entering the concept of ''lost spark''????
The double output coil is it producing energy simultaneously to 2 cylinders ????

I am new on mechanic, so tolerance is appreciate :rolleyes: Thank you.

Normand (Québec)

 

[racerone]

Correct----lost spark ----Is the concept.

 

[Quicksilver]

Plus the spark occurs half as many times as a 2-stroke engine.

 

[racerone]

Quicksilver-----You might find that with a " lost / wasted spark " type ignition that the plug sparks just as many times as in a 2 stroke engine.

 

[Quicksilver]

Oh I was thinking of a 4-stroke car engine that drives the distributor from the cam shaft.