Scintilla - Magneto Manual

Many vintage Scintillas feature oil cups. Use only a few drops of high-grade instrument oil every 100 hours of operation.

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.

Look for hairline cracks in the Bakelite distributor blocks. These can cause "carbon tracking," where the spark jumps to the ground instead of the plug. scintilla magneto manual

Before cracking open the housing, perform a visual and tactile "health check":

Always treat a magneto-equipped engine as if it could start at any second. If the internal grounding wire (the P-lead) is broken, the magneto is "hot," meaning it will fire if the propeller or flywheel is turned, even if the ignition switch is "OFF." Summary Checklist for Your Shop Manual Tool Needed Every 100 Hours Feeler Gauge Cleaning Blocks Denatured Alcohol Bearing Lube Per Manufacturer Specs Instrument Oil Magnet Recharge Rare (every 10+ years) Magneto Charger Many vintage Scintillas feature oil cups

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

Most Scintilla manuals specify a gap of .012" to .015" . Use a feeler gauge to verify. It doesn’t require a battery to operate; instead,

Rotate the engine or magneto shaft until the cam follower is on the highest point of the cam lobe.