Grasshopper Mower Mulching Package, Fits Deck Model 9561, Mulching Package Reroutes Airflow and Clippings That Forces Them Deep into The Turf After Being Recut into Small Particles, OEM 503595 Review
By the Mowers.Cloud editorial team · How we research & rate · Updated June 2026
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The Grasshopper Mulching Package (OEM 503595) is a precision-engineered accessory designed exclusively for the Grasshopper Deck Model 9561. It transforms your standard mowing deck into a high-performance mulching system by rerouting airflow and clippings to recut grass into fine particles, then forcing them deep into the turf. This is for commercial landscapers and serious residential owners who demand a clean, nutrient-rich lawn without bagging or side-discharge mess.
Who Should Buy This
Commercial landscapers with Grasshopper Model 9561 decks – If you’re running a fleet or a single zero-turn mower for client properties, this package saves time by eliminating clippings cleanup while returning valuable nitrogen to the soil.
Homeowners with large, open lawns (1+ acres) – You want a manicured look without stopping to empty bags every 15 minutes. This package lets you mow continuously, leaving no visible clippings.
Turf perfectionists who hate thatch buildup – The forced deep-turf action reduces surface thatch and feeds the root zone. If you’re obsessed with a dense, green lawn, this is your upgrade.
Operators who mow in wet or tall grass – Standard mulching decks clog easily. Grasshopper’s redesign keeps airflow high and clippings small, so you can mow in conditions that would choke lesser mulching kits.
Key Features Breakdown
Reroutes Airflow and Clippings – This isn’t a simple block-off plate. The package reshapes the internal deck geometry, creating a vortex that recuts clippings multiple times before they exit. Result: particles small enough to decompose within days, not weeks.
Forces Clippings Deep into Turf – Many mulching kits just drop clippings on top of the grass. Grasshopper’s design uses high-velocity air to push particles down to the soil surface, where microbes break them down faster. This means less visible clippings and better nutrient cycling.
OEM 503595 Fitment – Built specifically for the Model 9561 deck (typically found on Grasshopper 721D, 725DT, and similar series). It bolts directly to existing mounting points with no drilling or modification. If you’ve got a 9561, this is a true drop-in.
Recuts into Fine Particles – The combination of baffle angles and blade timing ensures grass is cut 3–5 times before it exits. Fine particles don’t clump or smother the turf, even in dense, fast-growing grass like fescue or Bermuda.
OEM Quality Construction – Heavy-gauge steel with powder-coated finish resists rust and impact. All hardware and gaskets are included. This isn’t a flimsy aftermarket kit—it’s built to the same tolerances as the deck itself.
Pros
- Eliminates bagging entirely – No more stopping to empty bags, no plastic waste, no disposal costs. Just mow and go.
- Improves lawn health naturally – Clippings return nitrogen, potassium, and phosphorus to the soil. Over a season, this can reduce fertilizer needs by 25–30%.
- Works in challenging conditions – Handles damp grass and taller growth better than most mulching kits, thanks to the aggressive airflow design.
- Professional-grade finish – Leaves no windrows or clumps. Lawns look like they were groomed with a comb, not a mower.
- Simple installation – Bolts directly to the Model 9561 deck in under 30 minutes. No cutting, welding, or special tools required.
- Built to last – OEM steel construction with corrosion-resistant coating. Expect years of service even with commercial use.
Cons
- Pricey at $393.75 – This is a significant investment for a mulching kit. Budget-conscious owners might balk, but for commercial use or large properties, it pays for itself in time saved.
- Only fits Model 9561 decks – If you have a different Grasshopper deck or a non-Grasshopper mower, this won’t work. Check your deck model before buying.
- Slightly reduces discharge versatility – Once installed, you lose the ability to side-discharge or bag without removing the kit. If you occasionally need to collect clippings (e.g., for diseased grass), this adds work.
- Not ideal for extremely thick, wet grass – While better than many kits, no mulching setup is perfect. In 6-inch-tall, rain-soaked grass, you may still see occasional clumps. Mow more frequently for best results.
Bottom Line
The Grasshopper Mulching Package for the Model 9561 deck is the gold standard for owners who want to maximize mowing efficiency and lawn health without compromise. It’s not cheap, but it’s a one-time purchase that eliminates bagging, reduces fertilizer costs, and delivers a finish that looks like you spent hours with a rake. If you’re running a 9561 deck and you mow more than an acre per session, this is a no-brainer upgrade. For smaller lawns or occasional use, the price may be harder to justify, but the performance is undeniable. Highly recommended for serious operators.
Frequently Asked Questions
Will this fit my Grasshopper 721D with a 61-inch deck?
It depends on the deck model number. The package is specifically for Deck Model 9561, which is commonly found on 721D, 725DT, and 725G models with 61-inch decks. Check the metal tag on your deck—if it says 9561, you’re good. If not, this won’t fit.
Do I need special blades for this mulching kit?
Yes, Grasshopper recommends using their OEM mulching blades (sold separately) for optimal performance. Standard lift blades won’t create the proper airflow pattern. The kit itself includes the baffles and gaskets, but blades are not included.
Can I switch back to bagging or side-discharge easily?
It’s possible but not quick. The mulching package replaces several deck components, so you’d need to remove the baffles and reinstall the original parts. Allow 30–45 minutes for the swap. Most owners leave the kit installed permanently once they see the results.
How It Compares
Quick Verdict
There is no outright winner because these are completely different products: the Grasshopper is a specialized mulching kit attachment (not a mower), while the Greenworks is a complete cordless push mower — so your choice depends entirely on whether you already own a compatible Grasshopper zero-turn mower or need a standalone electric mower.
Side-by-Side Comparison
| Feature | Grasshopper Mulching Package | Greenworks 40V 16" Push Mower |
|---|---|---|
| Price | $393.75 | $249.99 |
| Power Source | None (deck attachment for gas zero-turn) | 40V lithium-ion battery (4.0Ah included) |
| Cutting Width | Fits 61" deck (Model 9561) | 16" |
| Self-Propelled? | No (requires tractor) | No (push mower) |
| Best Yard Size | 2+ acres (with Grasshopper tractor) | Up to 1/3 acre |
| Warranty | Not specified | 4-year limited (battery: 2-year) |
Where Grasshopper Wins
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Superior mulching engineering for large properties – The Grasshopper package is designed to reroute airflow and recut clippings into fine particles, then force them deep into the turf. This eliminates surface clumping and returns nutrients efficiently, a level of performance unmatched by any push mower’s mulching plug. It’s built for commercial-grade, high-volume mowing on 2+ acre lots.
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Zero-turn deck compatibility – This kit specifically fits Grasshopper’s Model 9561 61" front-mount deck. If you already own one of these $8,000+ mowers, the $393.75 investment dramatically improves cut quality without buying a new machine. It’s a precision upgrade, not a stand-alone tool.
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No battery limitations – As a mechanical attachment for a gas-powered zero-turn, it never runs out of charge, never requires battery replacement, and can mow continuously for hours. For large properties, this eliminates the range anxiety inherent to cordless mowers.
Where Greenworks Wins
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Complete, ready-to-mow solution – For $249.99, you get a fully functional mower with battery, charger, and 16" cutting deck. The Grasshopper package requires a compatible tractor costing several thousand dollars. Greenworks is accessible to any homeowner with a small lawn.
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Proven reliability and scale – With 11,946 reviews and a 4.2-star rating, the Greenworks has been tested by tens of thousands of users. The Grasshopper kit has only 1 review. You’re buying a known quantity with clear performance expectations.
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Battery ecosystem and low maintenance – The 40V battery works with 75+ Greenworks tools (trimmers, blowers, chainsaws). The mower is push-button start, near-silent, and requires no oil, gas, or spark plugs. Ideal for small yards (1/3 acre or less) where a gas mower feels like overkill.
Which Should You Buy?
Buy Mower A (Grasshopper Mulching Package) if: You already own a Grasshopper zero-turn mower with a 61" Model 9561 deck and want professional-grade mulching that eliminates bagging entirely. This is for owners of large properties (2+ acres) who demand perfect striping and nutrient recycling from a commercial machine.
Buy Mower B (Greenworks 40V Push Mower) if: You need a simple, affordable cordless mower for a small to medium lawn (up to 1/3 acre). It’s perfect for first-time buyers, those with tool battery ecosystems, or anyone wanting quiet, low-maintenance mowing without the cost or complexity of a riding mower.
Buy neither if: You need a mid-range gas push mower or a self-propelled electric model. The Grasshopper is an attachment only, and the Greenworks is a basic 16" push mower — consider alternatives like a Toro Recycler or EGO self-propelled for hilly or larger lawns.
Here is a head-to-head comparison of the Grasshopper Mulching Package (Model 9561) and the WORX WG743 17" Cordless Lawn Mower.
Quick Verdict
The WORX wins for the average homeowner due to its complete, ready-to-mow package, lower price, and massive user feedback, while the Grasshopper is a niche, high-cost upgrade for commercial operators who already own the specific deck.
Side-by-Side Comparison
| Feature | Grasshopper Mulching Kit (503595) | WORX WG743 17" Mower |
|---|---|---|
| Price | $393.75 (kit only) | $329.99 (complete mower + 2 batteries) |
| Power Source | N/A (Deck attachment for gas PTO) | 20V Cordless (Lithium-Ion) |
| Cutting Width | N/A (Designed for 61" deck model 9561) | 17 inches |
| Self-Propelled | No (Mower deck must be on a zero-turn) | No (Push mower) |
| Best Yard Size | 2+ acres (commercial use) | Up to 1/4 acre (small residential) |
| Warranty | Limited (OEM part, typically 1 year) | 2 years (tool + battery) |
Where Grasshopper Wins
- Superior Mulching Engineering: This is not a standard blade; it is a complete airflow rerouting system. The kit forces clippings deep into the turf after recutting them into fine particles. This reduces thatch buildup and returns nitrogen to the soil far more effectively than a standard side-discharge or bagging deck. For turf managers, this creates a healthier, greener lawn.
- Commercial Durability: This is an OEM Grasshopper part designed for a heavy-duty, commercial-grade zero-turn mower. It is built from thicker gauge steel and designed to withstand years of daily commercial use. It will outlast any residential push mower by a factor of 10 or more.
- Massive Deck Capacity: When installed on a 61" Grasshopper deck, this kit allows for mulching a very large area quickly. You can cut 2-3 acres per hour without stopping to empty bags, making it a productivity tool for professional landscapers.
Where WORX Wins
- Complete, Ready-to-Use Package: For $329.99, you get the mower, two 20V batteries, a charger, and a mulching plug. The Grasshopper kit is $393.75 and requires you to already own a $6,000+ Grasshopper zero-turn mower with a specific 61" deck. The WORX is a complete solution; the Grasshopper is an expensive add-on.
- Lightweight & Easy Storage: The WORX weighs roughly 30 lbs and folds vertically for hanging on a wall. The Grasshopper mulching kit is a heavy steel plate that requires tools and 30+ minutes to install or remove from a massive mower deck. The WORX is far more convenient for homeowners with limited garage space.
- Proven Consumer Reliability: With 7,073 reviews and a 4.1-star rating, the WORX has been tested by tens of thousands of users. The Grasshopper kit has only 1 review. You know exactly what you are getting with the WORX: a quiet, lightweight mower that works well on small, flat lawns. It also has a 2-year warranty vs. the typical 1-year on the Grasshopper part.
Which Should You Buy?
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Buy the Grasshopper Kit if: You already own a Grasshopper zero-turn mower with a 61" deck (Model 9561), you mow 2+ acres of high-quality turf weekly, and you want the absolute best mulching performance to eliminate bagging. This is strictly for commercial operators or wealthy homeowners with large, manicured estates.
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Buy the WORX Mower if: You are a homeowner with a small to medium yard (under 1/4 acre), you want a lightweight, easy-to-push mower that stores in a closet or on a wall, and you want a complete, working product delivered to your door for under $350. This is the clear choice for 95% of buyers.
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Buy Neither if: You have a yard between 1/4 and 1 acre. The WORX is too small and underpowered for that, and the Grasshopper kit is absurdly expensive for a residential user without the proper mower. In that case, look for a gas-powered self-propelled mower (e.g., Toro, Honda) in the $400-$600 range.
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🛒 View on Amazon →Last updated: June 2026