But if not in series, 27 ohms on 9V is over 300mA, more that any 555 is rated to handle. And way more than a little 9V battery can handle.
If it is 7V without a load now, it is dead.
Put them in series as suggested with a new battery. We still need to know which 555 - SN555? NE555? TLC555? Some other variety?