Yes.
A cross reference for the John Deere GY20850 mower blade includes several compatible part numbers from different manufacturers. Common cross-reference options include the Oregon 91-610 and the Stens 330-144 blades. It's always recommended to verify compatibility with your specific mower model before purchasing a replacement blade.
Usually a short length of 2x4 can be used to wedge and hold the blade to loosen the bolt.
Remove the bolt holding the blade to the left
Place a block of C4 underneath it
Check for proper blade length for mower if that is right. Check for bad bearings in blade drive shafts if OK . Check for bent shafts. Hope this helps.
probably not cant u figure that out youself
How is the belt position on the front 48" deck on a JD F525
To change the blade on a Task Force model 25073 mower, first ensure the mower is turned off and unplugged for safety. Use a socket wrench to remove the bolt securing the blade, turning it counterclockwise. Carefully lift off the old blade and replace it with a new one, ensuring it’s oriented correctly, then reattach the bolt and tighten it securely. Finally, check the blade for proper attachment before using the mower again.
john deere smallest riding lawn mower
counterclockwise
Remove the mower deck. Block the blade from turning by using a piece of wood wedged between the blade and the mower deck. Loosen the nut on the top of the pulley (May require a cheater bar). Remove the pulley. If it doesn't come off easily, use a 3 armed pully remover. Once the pulley is removed, loosen the four self-tapping bolts that hold the spindle to the bottom of the deck and the spindle will fall loose. Remove the blade. Install the new spindle from below using NEW self-tapping bolts to bolt the new spindle to the deck. Replace the blade, install pulley, block blade from turning then tighten the top nut.