Outboard Motor Coils

[Jim Staff]

> Question 1:  Would these coils (and, possibly, their electronic controller)
> have applicability in an automotive application?
> 
> This engine also uses unusual spark plugs.  There are no conventional
> electrodes.  Looking end-on to the plug, it looks like an archery target --
> three annular rings.  The center ring is the center electrode, the second
> ring is the insulator, and the third ring is the outer electrode (case).
> Viewed from the side, the plug is flat across, with the insulating ring
> slightly recessed.  The spark occurs at any point across the faces of the
> center and outer rings.  These plugs last a long time, and, of course, there
> is no gap to adjust.


You know I always wondered why they didn't make plugs like that? I see a 
circular electrode as being nearly foul free, hanving a good spark as the fround
expands towards the piston and not at the cylinder walls as with a normal plug.

The questions...
  1. How far do these suckers stick below the head?
  2. How much volatge is used to drive the puppies?
  3. How large are they?

              Jim Staff
              Always looking for a cool way to improve a 3HP Briggs performance.