Based on the service manuals, 90% of "dead" Scintilla magnetos suffer from one of three issues:
The Scintilla magneto manual is more than a paper artifact—it is the key to bringing history back to life. Without it, you are guessing with 70-year-old Swiss tolerances. With it, you can diagnose, rebuild, and tune a magneto that will outlast modern electronics. scintilla magneto manual
This is the standard interval for Scintilla magnetos, though modern FAA guidance often refers to "Condition Directed Maintenance." Based on the service manuals, 90% of "dead"
Keeping the Spark Alive: A Hands-On Guide to the Scintilla Magneto Based on the service manuals