Why won’t the cord pull on the lawn mower?

When a push lawnmower’s pull string, or starter rope, locks up, it could mean the engine has a problem, but that usually isn’t the case when oil is added to the engine regularly. … The problem also could be with the recoil starter. Unless the engine has seized, you should be mowing after a few minutes.

What causes a pull cord to lock up?

One way the starter cord can get stuck is due to hydraulic lock, which is caused by oil getting trapped in the combustion chamber. You’ll need to release the compression and the oil, so remove the spark plug and then give the cord a tug.

Why does a lawn mower lock up?

If it’s full of oil, the piston cylinder may be full of oil, causing hydro-lock. This can happen when you tilt the mower forward and hold it that way for a few minutes. … But when the cylinder is full of oil, the piston has to work against the oil and can lock.

Why is my pull cord not catching?

The pull cord mechanism on a lawn mower isn’t complicated, and the reason your cord isn’t catching is that one of the components of the flywheel starter assembly has failed under the stress of regular use. Typically it’s either worn or broken pawls, or a damaged pulley system.

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How do you unlock the pull cord on a lawnmower?

Put on leather work gloves, and gently push the mower blade until it turns, or push the blade from a safe distance by using a stick. After you can spin the blade freely, you should be able to pull the starter rope to start the engine.

Why did my mower blades stop working?

If your mower blades will not turn after the blade controls have been engaged, your deck belt may be broken. The deck is located directly under the operators seat. This belt spins the mowers blades and runs through a pulley system of idlers. … If the belt has snapped, it will need to be replaced.

How do I know if my lawn mower motor is locked up?

Following are the signs that your lawn mower engine is seized.

  1. Engine sounds rough.
  2. Engine does not start.
  3. Blades do not move and are stuck.
  4. The cylinder and piston are fixed.
  5. Low oil level.
  6. Deteriorated fuel quality.

How does a pull start recoil work?

In the center of the pulley, a recoil spring connects to the pulley through a hook. When the starter rope gets pulled off the pulley and out of the engine, the recoil spring stretches out. … This allows the operator to continuously pull the rope to get the engine moving faster and faster toward combustion.