What makes a lawn mower pull hard to start?

Other possible causes include: Loose, Dirty or Disconnected Spark Plug in Your Lawn Mower: Check it out, clean off debris, re-connect and tighten. Dirty Air Filter: Clean or replace. Fuel Not Reaching the Engine: Tap the side of the carburetor to help the flow of gas.

Why is my mower so hard to pull start?

The problem may be in the recoil starter itself. A tangled coil of rope or a broken spring may be the problem. … If a lawnmower blade is loose or missing, the rope will pull part way, then become very difficult. Most lawnmower engines count on the flyweight of the blade to carry the engine through its compression stroke.

What does it mean when your lawn mower cord won’t pull?

What if the starter rope won’t pull? The crankshaft is connected to the blade shaft on your recoil start walk behind lawn mower, so if the pull cord is stuck, it could be because something is blocking the movement of the blade. Disconnect the spark plug for safety, then take a look under the deck.

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.

THIS IS INTERESTING:  Quick Answer: What is Fourwheeler tractor?

Why did my 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.

How many magnets does a lawn mower flywheel have?

There is only one magnet in the flywheel. The other piece of steel is a counterbalance and may have only picked up some residual magnetism. If you’ve got strong magnetism in the one piece, your flywheel is good. It’s possible that your ignition coil is bad.

How do I know if I need a new flywheel?

4 Signs It’s Time to Replace Your Flywheel

  • A Burning Smell. If you’re noticing a burning smell—similar to burnt toast—it’s possible the flywheel has worn out. …
  • Clutch Vibrations. Vibrations in the clutch are usually a sign that the spring mount mechanism on the flywheel has failed. …
  • Gears Slipping. …
  • Clutch Replacement.