How Do I Install a Mulch Kit?

Opting to mulch grass clippings when mowing can help increase the nutrients deposited on your lawn. Mulching can cut clippings into fine pieces, allowing the grass to efficiently and effectively decompose and penetrate the soil.

Often, riding mowers come equipped with mulch kit capabilities; some are included with the purchase of a unit, while others are available as add-ons.

Learn how to install a mulch kit on your riding mower with these step-by-step tips, so you can enjoy a fresh, nutrient-rich lawn after every mow.


Step 1: Remove the cutting deck

Remove the cutting deck from beneath the tractor as instructed in your owner's manual.

Step 2: Flip the deck over

It's recommended to lay down a piece of cardboard to protect the deck before turning it over. Gently flip the deck over, on top of the cardboard, to expose its underside.


Step 3: Secure the old blades




A blade removal tool can be used to prevent the blade from rotating during the removal of the blade nut. When removing old blades, make sure to keep the blade nuts for the installation of the new blades. You can also use a block of wood between the deck housing baffle and the cutting blade to prevent the blade from rotating.


Step 4: Remove the old blades

Next, use a wrench or breaker bar and socket to remove the hex flange nut that secures the blade to the spindle assembly. Notice the hex flange nuts have a standard right-handed thread pattern and should be turned counter-clockwise to loosen. Remove the old blades.


Step 5: Attach new blades

Replace the old blades with the blades included in the kit. Be sure to install each blade with the side marked 'bottom,' or with the part number on it, facing the ground when the mower is in the operating position.  Also, line up the blades' star pattern center hole with the star pattern of the spindle. Use a torque wrench to tighten each blade flange nut to between 70 and 90 foot lbs.


Step 6: Flip the deck back over

Carefully flip the deck back to its upright position.


Step 7:  Install the mulch plug

To install the mulch plug, lift the discharge chute up. Insert the mulch plug into the deck discharge chute opening by fitting the rod on the front side of the mulch plug into the hole found on the deck wheel bracket. Pivot the mulch plug into place. Position the rear of the mulch plug over the pin found on the deck's surface and secure the mulch plug with the wing knob.


Step 8: Reattach the deck to your mower

Slide the deck back under the tractor and reattach the deck as instructed in your owner's manual. It is not necessary to uninstall the mulch kit to perform other tasks with your tractor. the future, if you want to mow without mulching, simply remove the mulch plug - you will not need to change the blades.  



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