i would look on you tube for a instructional video, it's not very diffecult but hard to explain in words
How do I replace starter cord on lawn mower? Remove the engine starter cover or blower housing which contains the starter rope. Check to see if the spring is still good then just rewind the starter rope pulley to re-tension the spring. Insert the replacement rope into pulley as originally routed and let the spring wind the rope back into pulley. Then replace the starter handle. Make sure you keep tension on the starter pulley while the rope is winding.
In general- secure a replacement starter cord. Remove the cord starter reel, Wind the spring driven reel about 5 turns, aligning the cord hole in the reel with the channel for the cord. While holding the reel against the spring, insert the starter cord, tie a knot on the cord inside the reel, let the spring gradually turn the reel until the cord Is wrapped on the reel, replace the starter wheel unit on the weed eater, replace the screws that hold it in place.
You have to buy a new rope, remove the cover from the engine that contains the manual rope starter. There is a spring inside that can fly out and injure you if you do not know what you are doing. My suggestion is that you take the mower or the cover to a lawn mower shop and let them replace the rope if you are not comfortable tackling this yourself. It can be tricky to install the new rope and wind the spring just right.
It's very easy remove all the screws/bolts around the starter cord The top should pull off easy to reveal the housing that the cord wraps around . AHA ... DJ_13 adds: 1) It is NOT easy to remove the bolts from the cover!! I had to use WD40 and a special pair of pliers. Took forever. There is a metal SPRING the cord is attached to. When you pull the reel out, the metal spring will uncoil rather RAPIDLY .. stay out of the way!! 2) No one has explained exactly HOW to wrap the spring up and add the cord in a manner to effectively cause the spring to coil up enough to start the engine. IF directions came with the lawn mower, written in English, and properly illustrated, it would be a whole lot easier to DIY !! I think that is not something the manufacturer supports!! GOOD LUCK!! I now know more about gas lawn mowers than I ever wanted to know!! (sigh....)
the recoil spring is broken.
If the cord hangs loose/does not rewind you have a broken rewind spring. Not difficult to replace.
Chances are the coil spring has a broken "locking tang" on the end. They are notorius for breaking when you pull the cord to start the mower. You can go to Sears and purchase the OEM replacememt fairly inexpensivly. The new spring is stronger and contains the instructions on how to install it.
scotts intek 6.5 starter cord replace
Frankly, it is pretty easy - but hard to believe you can't just replace the pull cord! You have to spend about $45 (w/ shipping) instead on: John Deere Recoil Starter Assembly - LG497680
Hook up jumper cables to a different battery, stick the black cord on the frame of the mower to ground it; touch the red to the starter bolt and hold it there until it starts.
I don't think that is caused by the flywheel. I think it's your recoil. They have a coiled spring inside and it sounds like that spring has detached or broke. Be VERY careful if you try to remove that, it will spring out and go all over the place. They are pretty tricky to replace. It's best to replace the whole recoil. It is possible to just replace the spring, but takes alot of experience. It could also be the dog house not engaging. That is easily replaceable, just make sure you don't knock the spring out while you're doing it tho. Be sure to hold the spring down while removing the bolt that holds the dog house down. When you pull the cord you should see a thing pop out. That's the dog house and that's what engages the flywheel.
When you are moving your lawn with an electrical mower with a cord then you should travel horizontally from each end of your lawn. You should make sure that you are not turning your mower towards the cord, otherwise, the card will tangle.