How do I replace the pull cord on a craftsman 6.75 HP EZ walk?

Im Don't but SearsPartsDirect.com will.

Remove the spark plug, reconnect the spark plug wire, crank the motor over and look for spark at end of plug.

If there is any adjustment at all it will be done on the drive cable itself not the belt. You will adjust the cable in order to pull more tension on the belt.

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pull and overhaul the carby
indicates water , gunk or dirt in the main jet

Remove the 4 screws that cover the tension belt assembly. Look under the assmebly that has the red lever that engages the drive. There should be a square button that you can pull out and push in. Pull the square button out and then pull on the cable down on the end where it attaches to the pulley with a spring. You should feel the tension cable come out some. While holding the cable in the position you want to release the tension on the belt assembly, push the black square button back in. The cable will stay in this position unless you pull the square button out again. If you do it will apply all the pressure back on the pully assembly again making the it hard to pull the lawnmower in reverse. This is the solution. Enjoy!

before u buy a new housing check ur spring did u rewind the pull cork enough or check if the spring disconnected from its clip

Not sure where to look for the model number. But here's a few things to check.
1. If the gas is old (from last year), drain it out of the tank, carb and lines and replace with fresh. Gas can go bad and won't ignite properly after it has been around too long.
2. Replace the spark plug.... sometimes they look good and aren't.
3. Clean the Air filter. Take the filter element out of the housing and give it a good cleaning with compressed air. If it's plugged up with debris and dust, your trimmer won't run.
4. Make sure the oil level is correct. Many of the current motors won't run if the oil is low.
hope this help ya
k

is the spring broke if not wind the spoll up a couple of times then install handle

Remove cowling to acces pull start assembly. Have new cord on hand. Remove old cord fragments. Wind rotor 4-5 revolutions to tension spring and hold while threading new cord into slot. Knot new cord and slowly let it wind back into assembly.

usually theres just a few bolts to take off on the top, and the whole rip cord assembly will pull right out, allowing you to install the new one.