A pull start on a snow blower may not move because it has something that has fallen in the hole and is blocking the movement. You can also try lubricating the hole and the wire. You may have to take the blower in to get serviced.
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most commonly the shear pins on the auger broke, these are pins or bolts that pass through the auger & shaft. if they are sheared they need to replaced with replacement pins not a standard bolt/ shear pins are made to brake easly so something more expensive doesn't brake, you can get them at any small engine shop, beyond that
There is probably several answers for this, but I'll give you 2. The first is that the auger belt is either too loose or broke, The second would be that the key in the gear box is broke. Take the inspection shield off for the belts and check that first.
1) check spark plug and plug wire, try new plug
2) check ground at throttle shut off, kill switch, or any saftey shut of devises, are they disengaging.
3) broken key on flywheel (weak or occasional spark or mistimed spark)
4) corroded pickup coils and/or magnet on flywheel. (weak spark)
5) corroded or improperly adjusted or worn out or broken points
6) or bad coil
Remove flywheel, clean pickup coils and flywheel magnet. Points are behind flywheel, usually behind a cover, clean points, adjust points gap. Replace if worn or broken. reinstall flywheel with new key.
You can by a kit at most small engine repair shops which includes key and point sets for under 20 bucks.
This procedure is not valid with electronic ignition equipment (EFI)
Because the turn spring is broken. You need replace the spring, sometime they sell the whole piece as one.