"Big Al" writes:

check to see if you get spark by holding
the plug wire 1/4" from the head with your hand and pull the starter
cord. A minor shock will tell you its getting spark, pull the starter
cord fast and hold tight.

Did that once.
Must have been 19 years old.
more than 40 years later, I say
DON'T DO IT, IT HURTS!

Best to leave the plug lying on the head,
you can see the spark.