First do the test above (isolate the ign. system from the kill wire). The coil gap most likely hasn't changed in years, and you're not going to get at the primary coil without removing the engine, so if still no spark without kill wire attached and using either a new plug for the test or a spark tester, you've only determined that 1 of the coils is NG.
The E model has a two-piece ignition system. All standard ignition coils have 2 windings, a primary and a secondary. Some OEM's figured it was cheaper to replace one when it went bad. Problem is, without specialized coil testers costing hundreds of dollars, most can be impossible to diagnose.
A local Echo dealer should be able to diagnose it for you, perhaps for a nominal fee. They still make that unit, but changed the model name.