Scintilla Magneto Manual May 2026

Some later manuals even list compatible Bosch or Wico parts.

| Symptom | Probable Cause | Solution | | :--- | :--- | :--- | | Engine won't start | Broken impulse coupling (no "snap" sound). | Replace impulse coupling. | | | P-Lead grounded (Switch in OFF position). | Check wiring/key switch. | | | Wet points (oil contamination). | Clean or replace points. | | Hard starting (Hot) | Timing drifted. | Re-time magneto. | | | "Vapor lock" (fuel issue, not mag). | Prime/throttle management. | | Rough running at speed | Broken ground wire (P-lead). | Inspect wires for chafing. | | | Cracked distributor block. | Inspect block for carbon tracking/cracks. | | High RPM Drop on check | Fouled spark plug. | Clean/replace plugs. | | | Magneto timing retarded. | Re-time the magneto. | scintilla magneto manual

Starting the Engine:

Run-up & Magneto Check:

If your magneto has a spring-loaded impulse coupling (makes a "click" when you turn the engine slowly), the manual dedicates a full section to cleaning and lubricating the flyweight mechanism with high-temperature grease. Some later manuals even list compatible Bosch or Wico parts

Scintilla used a unique clip-on terminal. The manual shows how to solder a new copper-core wire (never use carbon suppression wire). Run-up & Magneto Check:

If you are restoring or maintaining a Scintilla magneto, these are the standard manual procedures.

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