However, a Scintilla magneto is only as reliable as its maintenance. Whether you are holding a Bendix-Scintilla S-20 or a classic V-AG series, this guide serves as a practical manual for understanding, timing, and preserving these mechanical masterpieces. 1. Understanding the Scintilla Operating Principle
The most common "manual" task is setting the point gap. This dictates the timing of the spark.
Most Scintilla manuals specify a gap of .012" to .015" . Use a feeler gauge to verify. scintilla magneto manual
If the points are pitted or "frosted," they should be replaced or dressed with a fine point file. 4. Internal Timing (The E-Gap)
When the open, the magnetic field collapses, inducing a massive voltage spike in the secondary coil, which is then sent through the distributor block to the spark plugs. This "independence" is why they remain the primary choice for aviation safety. 2. Essential Pre-Service Inspection However, a Scintilla magneto is only as reliable
Unlike modern electronic ignitions, a Scintilla magneto is a self-contained high-voltage generator. It doesn’t require a battery to operate; instead, it uses a rotating magnet to induce an electrical current in a primary coil.
By following these manual basics, you ensure that your vintage machine fires on the first pull (or swing) every time. Use a feeler gauge to verify
Rotate the engine or magneto shaft until the cam follower is on the highest point of the cam lobe.
For vintage aircraft enthusiasts, classic tractor restorers, and stationary engine collectors, the represents the gold standard of mid-century ignition engineering. Known for their incredible reliability and "hot" spark, these Swiss-designed units were the heartbeat of legendary engines like the Pratt & Whitney Wasp and various Wright Cyclones.
Ensure the primary lead terminal is secure. A loose P-lead can prevent the engine from shutting off—a major safety hazard. 3. Adjusting the Breaker Points