I think the electronic ignition on my Brison 50 has bit the dust, with the spark plug out and grounded against the case and ignition on, turning the prop doesn't give me any spark, but I'm not convinced that's a good enough test. How's everyone else test potential bad ignition modules?

What brand ignition??

I stick my finger in plug recepticle and if it hurts its working...Naaaa!! Just kidding. I had to though..You left that one wide open...
Plug the fully charged battery directly to the ignition.(bypassing the switch) Make sure the plug is good and ground it good to the case of motor and turn her over. If no spark occurs its more than likely bad. Hope this helps...

Could be as simple as the sensor. If you power the ignition and turn the engine over with the plug not grounded you will smoke the sensor. Also have the CH ignition testing box. Cool tool to have.

I had the same problem a few years ago with my Brison 3.2. A new sensor was my fix.

With the cap on the plug and the plug grounded, what happens when you turn the unit off and on or pass a magnet over the sensor? It should spark when you pass a magnet over the sensor. My ignition will sometime spark when it is turned on.

Ignitions with hall sensors will trigger at 1 rpm when the magnet passes the edge of the sensor...
C&H ignitions will fire when the switch is turned on and off..
DA and older 3W ignitions don't use a hall sensor and need some rpm to trigger the circuit..
New 3W ignitions use two hall sensors and will trigger at 1 rpm..
Some Falkon ignitions use a hall sensor, trigger at 1 rpm.
If you rotate the crank and get no spark but switch it on an off and get spark, the sensor is bad, usually caused by lack of a ground...
Be sure you have the spark plug in the cap and touching the engine when testing, some hall sensors blow right away and some take a while...

Thanks, guys, gives me something to work with.