What can I use if I don't have a spark plug wrench?
In this regard, can you remove spark plugs by hand?
Gently grasp a spark plug wire by the boot (the place where it connects to the spark plug), twist it, and pull it straight out. Never yank on the wire itself (you can damage the wiring). The shiny thing sticking out of the engine block after you remove the wire from the spark plug is the terminal of the spark plug.
Correspondingly, what size socket wrench Do I need to remove a spark plug from a lawn mower?
Drive socket wrench in 1/2 inches or 3/8 inches, whichever is appropriate for your machine. New spark plug.
Can I replace spark plugs on my own?
Like rotating tires or changing oil, replacing spark plugs is a job that can be easily, and inexpensively, done in the confines of your own home. Although they don't need maintenance as often as the other two tasks, spark plugs are equally as important and require consistent monitoring.