Thanks for the input, fellas.
Yessir. Duly noted.
I agree on the coil probably not being the problem and wouldn't consider a couple hundred ohms out of spec "bad" at that range. Lower range = higher percentage out of spec, of course.
But as to the original question about the MegaFire module itself. Not sure it's any different than the Stens, Oregon, etc. Look the same to me. I suppose a timing light setup would indeed be the way to go for a definitive answer on any or all of em. Matter of fact, it would be cool to test all the available chip variants, polarity reversals, and flywheels back to back with an actual timing light setup to get to the bottom of the subject once and for all. One thread. One post. All the 031 chip conversion information right there in one place. Would make too much sense. LOL
Anything special about your timing light or will any old cheapie do the trick? A dial gauge or degree wheel to get TDC would probably be the way to go there, too.
Nothing special, mine cost about $20 so it's not the best. I have to rig up a 12v power supply or use a battery to run it though. It doesn't have to be real precise, I just take the spark plug out and stick a pencil or something in the hole and run it up to TDC and mark the flywheel and the engine with a magic marker then make another mark for about 20 or so degrees (whatever the spec is) before TDC, leave the plug out and turn it over with the drill and you'll soon see what you have.