How do i find out where the #4 spark plug is on my mountaineer 99

is there a diagram so i can see it

Won''t be in the owner''s manual but you can always Google "1999 Mercury Mountaineer engine firing order" Add your engine size in there, too "4.6L" etc. Or if you have a friend in the auto parts business or a Ford dealer? Maybe they will be nice and share the info. But I''m sure you can fnd it on the web. Or maybe you''ll get lucky and someone on the site can help. Good luck.