Ryobi string trimmer -weed eater pull cord hangs out wont start

Trimmer cord can become brittle and break off prematurely, the material can absorb water and become more flexible, so you should store any new cord in a bucket of water to keep it flexible,

Gary, diagnose where the problem really lays, do you have spark, is it getting fuel. PRESS THE HELPFUL BUTTON
String Trimmer Repair Help

How To Troubleshoot Your Weedeater to crank every time

http://cubcadet.custhelp.com/app/answers/detail/a_id/10653/~/basic-troubleshooting---hand-held-string-trimmer-(corded-electric)

ryobi weed wacker repair string trimmer wont start SIMPLE FIX

check this manual (page 14-15)
http://www.imarksweb.net/aws/view.php?u=aHR0cDovL3d3dy5yeW9iaXRvb2xzLmNvbS9wcm9kdWN0X21hbnVhbC9maWxlX3VybC8zNjcvUlkyOTU1MF8zMTBfZW5nLnBkZg==

hello sir, Please provide the following information so that your issue may be diagnosed properly,what is it? brand name,complete model number The problem, What is happening with what? When it is happening? Are there times it does not happen? Did it just start happening? Did it ever work ? Did any seemingly unrelated event coincide with whatever it is not working? need the model number and brand name, if you need a manual i need the brand name and model number,if it is a riding mower the model number is under the seat.a snow blower the model number is on the rear of the machine, let me know,thank you. ~~ i need to know this before i can give you a answer,,

Hello,
Pump the gas bubble near the black box air filter. Start pulling the string. Keep pulling until it turns.
Thanks

http://www.ereplacementparts.com/ryobi-ss30-ry30002-string-trimmer-parts-c-7931_15633_15651.html
This is a parts site for you with a schematic so you can see what is going on. I think your return spring is either broken or out of it's keeper. Check it out. hope this helps.

Try this link:
http://lawnandgarden.manualsonline.com/manuals/mfg/ryobi/700r_1.html

Sure its the correct spark plug? Sounds like the piston is coming in contact with the spark plug.

I have one of this trimmers. It is simple to replace the line. 
-First line up the arrows on the bottom of the spindle. 
-Then feed the line back in one of the holes in the side of the spindle (this is the same hole that the cutting string comes out of). 
-You will see the line come out of the bottom of the spindle. 
-Take that line a place it in the hole on the bottom of the spindle. 
-Leave about 9 feet of string hanging out of the weed eater (do the same with the other side). 
-Then turn the inside wheel (I can't remember if it is clock wise or counter clock-wise but it will only turn one way) most of the string is rolled into the spindle. 
-Cut the string of about 5 inches out of the weed eater. You're ready to cut!