Hi everyone. I have a problem I hope you can give me some insight on. It's a FS81 Stihl Handel Bar trimmer. It has intermittent and weak to no spark. I would usually change the coil, but this one also has a small electronic device wired to the coil. It is connected with one wire inline from the coil to the kill switch. Is this the electronic ignition module that is built in to the coil on the ones I've seen without it? I tried somethings that may shed some light. The spark is too weak to just the spark plug gap but I can feel it when I use my fingers grounding to the cylinder. And if I disconnect the "module" the spark gets even weaker. I checked for continuity through the coil and compared it to a known good one and it failed, no continuity from secondary coil wire to ground. But that's comparing a coil with built in module, if that's what it is. That's really all I have. Thanks and I'll wait for some help.