You have pretty well answered your own question. There are no other
components to that system other than the magnets, module, leads, plugs and
kill switch(es). They can produce a weak spark, sometimes one strong enough
to jump the plug gap but not strong enough to jump the gap under compression
and ignite the fuel mixture. A strong spark can be created, but at the wrong
time, if the flywheel key is sheared. I think your module is bad. [I have
been wrong a few times. :)]
Don Young

wrote in message
oups.com...
Thanks Chris, but there are no ground connections on an ignition module
like this. The only connection is the spark plug wire. The module is
mounted on the engine frame (good solid mount). There is an engine
cutoff wire that goes to the starter switch, but it is presently
disconnected for troubleshooting purposes, according to the manual.
Bottom line: I do get an output but not a strong one. Perhaps a
shorted coil winding inside the potted module that allows only a
portion of the inductance to be used...?

EW