How to Attach Lawn Mower Bag | Mounting Steps for Push & Riding Mowers

Attaching a lawn mower bag requires removing the rear discharge plug, opening the rear door, and securing the bag’s hooks or pegs onto the mower’s mounting rod or grooves, then closing the door to lock it in place.

A grass bag that won’t stay on — or one that fills with nothing because the plug is still in place — is a fifteen-second fix that stops a whole afternoon of frustration. The right sequence depends on whether your mower uses front hooks, side pegs, or a hard-cover bag, but every setup shares the same first step: remove the mulching plug. Here’s exactly how each common attachment style connects, from push mowers to riding tractor baggers.

Assemble the Bag Frame First

Most push-mower bags arrive with a separate wire frame. The bag won’t mount correctly until the frame is fully seated inside it. On an Ego mower, orient the word “Ego” upright, slide the frame into the bag keeping the handle above the bag top, then secure top clips first, followed by side clips and finally the bottom clip. Craftsman and MTD bags use plastic retainers that snap over the frame’s edge — unhook the old bag from these retainers, slide the new one over the frame, and press each retainer back in place.

A frame that’s twisted inside the bag will make the hooks misalign with the mower’s rod, so test the assembly’s rigidity before moving to the mower.

Step One on Every Mower: Remove the Mulching Plug

Lift the rear door and pull out the installed mulching plug. Grass simply cannot enter the bag with this plug in place — the deck’s discharge path is blocked entirely. Ego, Toro, and GreenWorks mowers all require this removal before the bag will function, and each brand’s documentation lists it as the critical first action after assembly.

Attaching by Bag Style

Mower manufacturers use three bag-mounting designs, each with a slightly different attachment motion. Match your mower’s rear door configuration to the style below.

Front-Hooks Style (Most Common)

Used by most Ego, GreenWorks, and Toro push mowers. Hold the assembled bag by its handle, lift the mower’s rear door, and place the two metal hooks onto the rear rod that runs across the mower’s back. Let the rear door rest down onto the bag — the door’s weight and the hooks’ grip lock it in place. To remove, simply lift the rear door and lift the bag off the rod. Toro’s official instructions stress never operating the mower without the rear discharge plug reinstalled when the bag is off, to prevent debris ejection.

Side-Pegs Style

Found on many GreenWorks models including the 2502402 and 2506402. Open the rear door fully. Align the plastic pegs on each side of the bag with the grooves on the mower’s rear frame, then push the bag inward until the pegs seat fully. Close the rear door to secure. The pegs will not seat if the bag frame is rotated even slightly — recheck the frame’s orientation inside the bag if it feels loose.

Hard-Cover Style

Some GreenWorks models use a rigid bag with a built-in hard cover. Position the bag under the opened rear door so the metal hooks on the bag align with seating grooves in the mower’s frame. Release the door — it presses the bag hooks into the grooves and holds everything tight. This style typically provides the most secure fit because the door’s spring tension directly compresses the connection.

How to Attach a Riding Mower Bag (Double Bagger)

Riding mower baggers are heavier systems that attach with brackets and hardware, not hooks alone. A Cub Cadet double bagger requires basic tools: a ½-inch socket wrench and two 7/16-inch wrenches. Start with the tractor off, engine cool, key removed, spark plug wire disconnected, and parking brake engaged. Mount the side brackets to the rear attachment with carriage bolts and wing knobs, then install the hitch support using the furthest holes from the rear hooks. Place the assembly’s hooked ends over the tractor’s shoulder bolts and secure with clevis bolts and hairpin clips. Slide the chute tube into the upper chute support, turning counterclockwise, and connect it to the boot. Finally, slide each bag onto the hanger bracket. Murray MT100 and MT1000 models follow a similar bracket-and-hitch pattern.

Common Mistakes That Stop a Bag From Working

The most frequent failure is leaving the mulching plug installed — the mower runs, the deck spins, and the bag stays empty. Wet grass is the second biggest culprit: damp clippings clump under the deck and block airflow into the bag, so mow when the grass is dry for best collection. A full bag also blocks airflow, which makes the deck sound choked; empty the bag frequently, watching the indicator flap if your mower has one. Buildup inside the bag reduces performance over time — rinse it with a hose and dry it completely before reattaching after several uses.

Not every mower accepts a bag at all — only models with a rear discharge port and compatible mounting points can use one. If your mower has no rear door and no rod or grooves behind the rear wheels, a bag is not an option. For readers looking to buy a mower that can bag clippings effectively, our roundup of top-performing bagged lawn mowers specs out the best current models for collection capacity and ease of attachment.

Bagging Kit Pricing

If you need a replacement bag or frame, prices vary by brand and whether the bag comes with hardware. A Craftsman replacement frame (part #747-05450) typically runs $25–$40 at hardware retailers. A Toro bag kit (part #115-4673) costs roughly $35–$50. For riding mowers, a Cub Cadet double bagger add-on ranges from $150–$250 and includes the chute, brackets, and both bags. Ego’s LM2206SP bag is included with the mower purchase; a stand-alone replacement price is not publicly listed, so contact Ego support directly if the original bag tears.

Checklist for a Secure First Attachment

Run through this sequence in order on any new bag installation:

• Frame fully seated inside bag and all clips snapped tight.
• Rear door lifted fully open.
• Mulching plug removed and set aside (store it inside the bag when not in use so it doesn’t get lost).
• Bag hooks or pegs aligned and seated before releasing the door.
• Door closed; tug gently on the bag — it should not lift off without the door being reopened.
• One pass mowing short, dry grass to test that clippings are entering the bag.

If clippings aren’t collecting after these checks, re-open the rear door and confirm the mulching plug is definitely out — it is by far the most common cause of an empty bag on a running mower.