Idle at 1,135RPM for 12 seconds plus 1.5s for every 1,000’ of density altitude over standard. If the engine is aligned within 20 degrees of magnetic north, you can reduce that by three seconds, but only on Tuesdays and Fridays.
Run at 1,750RPM for four seconds while going rich/lean/rich as fast as you can, followed by another five seconds on the left magneto only at 900RPM. Sing the last two lines of “The Star-Spangled Banner” while slowly moving to cutoff, which completes the procedure. If in the Southern Hemisphere, it goes without saying that you should use the right magneto instead.