A bent mower blade can cause mower deck vibration. The blades on the grass are ragged. If a riding mower blade is damaged, bent or dull, it's time to replace it.
Follow these steps to fix your issue:
Disconnect the spark plug
Set the parking brake when parking the tractor on a level surface. Remove the key from the switch. You should wear gloves to protect your hands. Remove the spark plug wire from the tractor hood. If your tractor has two cylinders, you should remove the spark plug wires.
Remove the mower deck
Lower the mower deck to its lowest position and then remove the support from it. It's possible to replace the blade without removing the mower deck. Don't use the lift lever until you install the mower deck because the lever exerts more tension after you disconnected the rear lift links.
Remove the old blade
To keep the cutting blade from moving, put a block between it and the mower deck. Remove the blade mounting bolt.
Install the new blade
Attach the blade to the shaft with the correct side of the blade and tighten the blade bolt. It is easy to install the lower side of the blade.
Reinstall the mower deck
Attach the blade clutch cable to the idler arm and position the deck under the tractor. Refer to your owner's manual for more on how to put the blade belt in place.
Reconnect the spark plug
Lower the tractor hood if you need to connect the spark plug wire. If your engine has 2 cylinders, you should connect both spark plug wires.
You would need the following tools:
torque wrench (optional), wood block, work gloves, wrench set.
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