Operating vintage aircraft or industrial engines requires strict adherence to legacy specifications. A proper service manual, such as those available through the AirCorps Library or Aircraft Spruce , typically includes:
Connect a timing light across the breaker points. Rotate the entire magneto housing slowly until the points break. Tighten the mounting bolts to lock the unit in place. 4. Maintenance and Lubrication Schedule
| Series | Common Applications | Notes | |--------|--------------------|-------| | | Single-cylinder farm engines (Wisconsin, Briggs) | Compact, vertical mount | | GV series | Twin-cylinder tractors (Allis-Chalmers, Case) | Dual spark outputs | | VR series | Vintage motorcycles (BMW R-series pre-1960) | Rotating magnet type | | AV series | Aircraft engines (Lycoming, Continental) | Dual magnetos, impulse coupled | | VS 4-6 | Stationary industrial engines | Large base, external impulse |
Remember: Every magneto has a spark in it. The Scintilla manual shows you how to let it out.
Guide the magneto into the engine drive pad. Engage the coupling splines gently. Loose-fit the mounting nuts so you can still rotate the magneto housing. Step 4: Fine-Tune the Position
The breaker points must begin to open exactly at the E-gap position. Loosen the breaker assembly adjustment screws.
Specific data for aligning the magneto with the engine's firing order. Key Types of Scintilla Magneto Manuals
Generally, points should be set between .015" and .018", but always verify with your specific model's manual.
Loosen the adjustable point locking screw, turn the eccentric adjustment screw until the gap is correct, and re-tighten the locking screw. Step 3: Checking the E-Gap Alignment
Scintilla magnetos utilize a or inductor-type design, making them smaller and lighter than older horseshoe-magnet models.
