Challenge xtreme manual

SOURCE: replace pullcord on troy built mower

Replacing the rope is not difficult but tricky. I believe that your model has a fuel tank on top of starter cover, empty fuel and remove tank to expose starter cover. Remove the starter cover and place it on your workbench with the plastic rewind spool visible and remove the old rope noting how it was tied. The rope is sold in various sizes from # 3 to # 6.5. Most mowers use a #4.5, with length of about 6 to 7 feet. You may not need this much but more is better. Now practice inserting the rope thru the hole where it comes out of the cover into the hole where it ties on the spool. Once you can do this you are ready to wind. The spool /spring winds when you pull the rope, that why it recoils when you let go of the rope. With that in mind, turn (wind) the spool in the same direction that it turns when you pull the rope. It should be getting tighter as you turn. Keep winding in the direction that it turns when you pull the rope untill it will not go anymore. It should be very tight. Now unwind one complete turn and align the hole of the spool to the hole in the housing and hold it there while you insert the rope from outside hole into the spool and tie knot. After the knot is tied slowly let rope rewind into the spool untill it stops on its own. You are done. You should have plenty of extra rope left to extend out to the handlebar. Enjoy

SOURCE: Pullcord

This usually happens at the most inopportune time. You go out mow the lawn, pull the rope and it comes out in your hand. Here's how to fix it yourself.
First, we'll talk about a simple rope replacement. In most cases you will have to remove the blower housing from the engine to get to the underside of the rewind starter where the rope is. We'll assume at this point that the spring is ok and you can just wind it back up again. You can check the spring by turning on the hub in a counter-clockwise direction and see if the spring gains tension. Do not try to remove the spring from its holder or you may end up having to take the mower in for service.
1. Remove the rope from around the hub. Since there is no tension, it should come right out. If you are lucky and it broke near one end, you can probably just re-use it. If it is badly frayed or too short, you will need to find a replacement at a local hardware store.
2. Attach the handle or tie a knot in one end of the rope so it will not wind all the way into the hub. You also may want to burn the rope ends to keep them from fraying and causing a problem in the future. Set the rope aside where you can grab it once you wind up the spring.
3. Wind the hub in a counter-clockwise direction using your thumb to keep it from unwinding, until the spring is tight. Then let it come back slightly so the rope hole in the starter housing lines up with the rope hole in the hub.
4. Stick the rope through both holes while holding the hub from unwinding. This is tricky because you don't want the hub to unwind on you before you have the rope secured in it. A pair of needle nose pliers or a small screwdriver or pick may help get the rope through.
5. Tie a half hitch knot in the rope after you have it through both holes. While holding the rope, release your hold on the hub and let the rope slowly pull itself back into the starter.
6. Put the blower housing back on and your ready to start the engine & mow.

SOURCE: Shrieking Lawnmower!!

sounds like you have dirt in the recoil clutch, (under the screen) or you bent something there. try removing the clutch and make sure shaft is very clean and lightly coated with oil. This would be for a briggs and stratton engine.

SOURCE: i pull the cord and it doesnt replace it self back

you may have gotten the rope on top of the spool that it returns on. Take the cover off the engine that contains the starter cord and the problem should become apparent. If it has been out in the weather you may have to clean it and lubricate . hope this helps.

SOURCE: broken pullcord

before you rethread it you must spin housing counter clockwise till you feel tension (if you let it go you have to restart ) then tread it