How tight should a spark plug be?

Related questions

1. What do NGK Spark Plug numbers mean?
2. Can you drive with a bad spark plug?
3. What happens when spark plugs are bad?
4. Can Oil ruin spark plugs?
5. What is an NGK?
6. Does spark plug gap make a difference?
7. Do you really need a torque wrench for spark plugs?
8. What are spark plug gaps measured in?
9. Should you use anti seize on NGK Spark Plugs?
10. Do better spark plugs increase horsepower?

Tags

1. #torque
2. #approximately
3. #plugs
4. #tightened
5. #extra
6. #finger
7. #fifteen
8. #tight
9. #until
10. #tighten
11. #hands
12. #recommendation
13. #tapered
14. #wrench
15. #manufacture
16. #spark
17. #seven
18. #installed