Spark plug insertion "tool"

If you're inserting a spark plug and you're worried about cross threading, this simple trick is kind of handy. Simply slip a short length of fuel line over the plug and use it as a wrench to insert and turn the plug. If the plug begins to cross thread and bind up, the fuel line will slip and you won't be able to thread the plug in further. If it goes in cleanly you can pull on the fuel line to pop it off then finish tightening with a spark plug wrench.

Done