Scintilla Magneto Manual _verified_ <1000+ PRO>

By following these manual basics, you ensure that your vintage machine fires on the first pull (or swing) every time.

Scintilla Magneto —specifically the iconic series—is more than just a piece of vintage hardware; it is the heartbeat of Golden Age aviation and the silent partner of the legendary Curtiss OX-5 engine. To own a Scintilla is to curate a masterpiece of Swiss-designed, American-built electrical engineering.

As the magnet rotates, it induces a low-voltage, high-amperage current in the closed primary circuit.

This is the holy grail. The exploded view shows every washer, spring, bearing, and screw. Scintilla was famous for using odd-sized screws and proprietary springs. With the diagram, you can identify a lost part (#22: "Spring, centrifugal advance"). scintilla magneto manual

The single best resource is , edited by E. Molloy and E.W. Knott. Other specific manuals include the "Handbook of instructions, with parts catalog, of Scintilla type SC double magnetos" from 1932, and Bendix-Scintilla Type DFN manuals that cover theory, service, and repair.

Even with proper maintenance, Scintilla magnetos can occasionally develop problems. Here are some common issues and their possible causes:

Many Scintilla magnetos were sold under OEM brands. For example, a Clinton or Lauson engine manual will often include a Scintilla section. Always cross-reference part numbers. By following these manual basics, you ensure that

This manual covers the types, commonly used on radial engines. It details the internal construction, flange mounting, and testing of these seven-cylinder units. 2. AG Series Manual (Vintage Engines)

While models vary (MN, MN1, MN4, EL, AG, etc.), most original Scintilla magneto manuals contain the same core chapters. Here is what you can expect:

Step-by-step procedures for routine maintenance. As the magnet rotates, it induces a low-voltage,

Unlike modern automotive ignition systems that rely on a 12-volt battery and an ignition coil, a Scintilla magneto produces its own electricity. It utilizes a rotating permanent magnet to induce a current in a stationary coil. The Magnetic Circuit

When an engine misfires, runs rough, or refuses to start, use this structured troubleshooting guide to diagnose the magneto issue. Probable Cause Corrective Action Ground wire (P-lead) shorted to frame. Disconnect P-lead; re-test for spark. Breaker points oxidized, oily, or stuck open. Clean points with alcohol or replace assembly. Faulty capacitor (condenser) shorted out. Test capacitance and resistance; replace if bad. Primary or secondary coil winding open. Test coil resistance with an ohmmeter. Weak Spark or Intermittent Misfire Incorrect breaker point gap. Reset point gap to 0.015 inches (0.38 mm). Internal timing out of E-gap alignment. Readjust internal gear-to-pinion timing. Weak internal rotating permanent magnet. Recharge or replace the rotating magnet. Engine Roughness at High RPM Weak breaker arm spring causing point float. Replace the breaker point assembly. Worn magneto drive couplings causing backlash. Replace the rubber or mechanical coupling disks. Spark Jumping Across Wrong Cylinders Moisture or carbon tracking in distributor block. Dry the block completely; clean off carbon lines. 5. Bench Testing and Overhaul Specifications

: Requires only a microscopic trace of specialized high-temperature cam grease. The Bearings

The Scintilla Magneto Company was founded in 1915 in Switzerland. The company quickly gained an international reputation for producing incredibly reliable high-tension magnetos that could withstand extreme vibrations and environmental conditions. The Bendix Acquisition