'73 Evinrude 65HP 65373R. Last two Sat. out on lake fully open throttle engine completely stops. Turns over, has fuel, battery good 12.28VDC. On trailer in driveway last Mon. started to troubleshoot and motor started as if nothing wrong. This time, boat tied to dock tried to crank, but nothing just turning and the great smell of fuel. Boat now on trailer, still no go. No spark. Wondering if power pack is fried and if there is a waw to test using multimeter instead of the neon light tester as directed in the book? Could it not be the power pack? Have no spark from all three plugs. 