after four hour run engine suddenly lost spark and died.

[afsam94]

I installed electronic ignition two years ago to replace points and new ignition system performed flawlessly until now.

In the absence of good sailing air we motored steadily yesterday for about 20 miles. The engine ran smoothly until suddenly rpm dropped and engine stopped entirely over a period of 2 seconds.

Engine turns over but will not start.
Fuel pump has good pressure to float bowl.
Emptied float bowl and refilled.
I should note that I removed a spark plug to examine it and it was certainly not flooded and in fact seemed dry but I think the biggest problem is that:
When I hold plug wire close to plug and crank there is no spark
There is no spark between the coil and distributor doing the same test.

Somebody else installed the electronic ignition a two years ago and with my limited ignition knowledge I was reluctant to start digging under the distributor cap (on the open water) to tinker with stuff I don't understand well.

I'm back safely in home port and was wondering what additional tests I can or should do.

Thanks again in advance to the Afourians

Al