Check and adjust the new spark plug's gap as described in step 15.

Put the new spark plug in the spark plug driver and insert it into the spark plug hole.

Turn the spark plug clockwise until the spark plug gasket seats. Turn the spark plug 1/4 to 1/2 a turn clockwise from the seated position.

See step 15 for torque specs if you are using a torque wrench.

Firmly press the spark plug cap onto the new spark plug until you feel it fully seat.