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How Do I Install A Mulch Kit On My Riding Mower?

How Do I Install A Mulch Kit On My Riding Mower?

There are many benefits to mulching your lawn. Using your riding lawn mower and a mulch kit can increase the nutrients that are deposited on your lawn. Follow these simple steps to install a mulch kit on your 46" Troy-Bilt riding lawn mower.


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

We recommend that you lay down a piece of cardboard to protect the deck. 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 hold the blade in place during the removal of the blade nut. When you remove the 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 baffel and the cutting blade to keep the blade in place.

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 that the hex flange nuts have a normal, right-handed, thread pattern. 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 bolt on the rear side of the mulch plug into the hole in the deck. Pivot the mulch plug into place. Pull and stretch the retaining plug on the mulch plug over the deck wheel bracket and hook it under the bottom of the bracket.

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's unnecessary to operate the tractor with the mulch kit installed. In the future, if you want to mow without mulching, simply remove the mulch plug- you will not need to change the blades. You are now ready to use your tractor as a mulcher.