Using a timing light with magnetos primarily helps verify which aspect of timing?

Using a timing light with magnetos primarily helps verify which aspect of timing?

• A. Spark timing relative to piston position
• B. Fuel flow rate
• C. Battery charge level
• D. Alternator output

Answer: (A)

Ignition timing is what a timing light with magnetos helps you verify. The timing light flashes every time the spark is produced by the magneto, so you can see exactly when the spark occurs in relation to the piston’s position on the crankshaft. By watching the flash against the engine’s timing marks or a degree wheel, you can tell if the spark is happening at the correct crank angle (advances or retards as specified) and adjust the magneto timing if needed. This test focuses on when the spark fires, not on fuel flow, battery condition, or alternator output.

Ignition timing is what a timing light with magnetos helps you verify. The timing light flashes every time the spark is produced by the magneto, so you can see exactly when the spark occurs in relation to the piston’s position on the crankshaft. By watching the flash against the engine’s timing marks or a degree wheel, you can tell if the spark is happening at the correct crank angle (advances or retards as specified) and adjust the magneto timing if needed. This test focuses on when the spark fires, not on fuel flow, battery condition, or alternator output.