How do you set timing on fairbanks magneto?

To set the timing on a Fairbanks magneto, first, ensure the engine is at top dead center (TDC) on the compression stroke for the cylinder you are timing. Next, remove the magneto cover and locate the timing mark on the rotor. Rotate the magneto until the timing mark aligns with the reference mark on the engine, then adjust the ignition points or impulse coupling as necessary to ensure they open at the correct time. Finally, reassemble the magneto and check the timing with a timing light if needed.