Put a new spark plug in the spark plug socket

Put the new spark plug in the spark plug tube and use the spark plug socket and extension only to turn the spark plug in a clockwise rotation by hand until the spark plugs feel tight. Repeat for the other five new spark plugs.

Once the spark plugs are partially set, use the ratchet to tighten the spark plugs until they feel sufficiently snug. Once snug, complete one final 1/4 turn with the ratchet to completely seat the new spark plugs.