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Motorized Chute Blocker

Motorized Chute Blocker "HD" (Automatic Grass Flap) by The Green Guard


Have a question?  Want to order by phone?  

Call Ryan at 1-888-446-7761.

Please call or email us with your lawn mower's make, model & deck width if you are unsure which of the 4 versions will fit your mower. All versions are commercial grade, the difference is the layout of the components to ensure they fit your mower's deck configuration.

Will this fit my mower?  Please read our blog with more info or print out the true-size template below to test fit it on your mower using paper.

Read our blog about mower chute blocker fitment.

This HD Chute Blocker model (this one) is for most mowers with 42" or larger decks. 

36" and smaller decks probably need the Slim HD Chute Blocker model, which has a slightly smaller profile.

Quickly convert your stock lawn mower grass flap with a motorized grass flap to promptly control the grass clippings within the mower deck. The grass flap has 4 positions the mower operator can scroll through with the press of a single button: Fully open, 1/2 open, 1/4 open, and closed. This gives you full control of the grass clippings!

Green Guard Grass Flap Review After 125 Hours

*We also sell the Proslide XT lawn mower sulky and no-drill kits for all Green Guard model motorized grass flaps Russell mentioned in this video.  We also do the online marketing for Gwinnett Lawns - Website, SEO, Google Ads, Company Emails, etc.  Learn more about our marketing services for lawn and landscape companies on our agency's website.  We've built over 100 lawn and landscape websites, all getting great results!

If your lawn mower is a pull start, you must add a battery. Learn more about using the Grass Flap/Chute Blocker HD Model with a lawn mower without a battery.

Will this grass flap fit my lawn mower?  Which model and flap material should I choose?

Test fit using this PDF:  

Please add a note at checkout with your lawn mower's make, model, and deck size so we can double-check fitment before shipping. If it doesn't fit, we will issue a full refund immediately.

You are viewing the HD model grass flap and chute blocker made by The Green Guard in the USA. The HD model is for lawn mower decks 42" and above, walk behinds, standers, and zero turns.  Check out the Slim HD model if your lawn mower has a 36" or smaller deck.

We recommend the rubber flap, but it is just a personal preference. The reason we recommend the rubber flap is that it is more forgiving. Even the most careful lawn mower operators can get a little too close to a fence post! The rubber will snap back into shape, while the aluminum flap prefers to bend.

Motorized Grass Flap Benefits

  • Keep your hands on the controls
  • Keep your feet and hands away from your lawn mower's blades
  • Save time mowing each lawn
  • Get a more professional finished result with better control of where the grass clippings fly
  • Reduce liability by utilizing the 1/4 open position when mowing near windows, vehicles, and other easily damaged items when mowing tall grass

Shave Seconds Off Mowing Each Lawn and Mow Safer

Professional lawn mowers know every second saved equates to more profit.  Become more efficient by automating your lawn mower's grass flap.  It is also much safer than sticking your hand or foot down by your lawn mower blades to open and shut it manually.

Need help?  Have a question?  Email with the information we need to assist you like your mower's model, model number, serial number, & deck width and the part you need, for example.

  • Low Prices

    We're a high-volume dealer

  • Fast Shipping

    We take fast shipping seriously

  • Returns Accepted

    Send it back for a refund if needed

  • Support

    Available by email

  • Find Parts/Callback
  • Stock Status
  • About Us

If you have a part number, type it into our search bar above.  If you need help finding parts, we are happy to assist!  Please request a callback by submitting the info we will need to assist you below.  Please complete the form below and we will send you a link to your machine's parts diagram AND send you links and pricing to the parts you are searching for whether we carry them or not!

We try to keep our store up-to-date to reflect accurate stock status.  Many manufacturers are struggling to source materials and retain employees right now causing more items to be out of stock than normal.

If you purchase an out of stock item, we will contact you ASAP to let you know we are issuing a full refund or find an alternative replacement whether we have it or if we find it on one of our competitors' sites.

If you'd like to verify stock status before making your purchase, please complete the short form below.

Ryan Sciamanna with his book.

Ryan Sciamanna is the owner of iGoPro Lawn Supply. He is also the guy that runs the LawnCrack YouTube channel and is the guy in those videos!

Ryan started his first job in the green industry when he was 18. At 24 he started his own lawn & landscape business. When Ryan was 34 he sold his business and started selling lawn & garden products online as well as building websites for lawn & landscape companies across the country.

Mission Statement:

Get people quality parts and supplies they need to keep their lawn equipment running quickly and at the lowest price possible!

Our customers include DIY homeowners, lawn services, farms, schools, municipalities, and everything in between.

If you need assistance, please complete the Find Parts/Verify Fit form so we have all of the information we need to quickly and accurately assist you.

Thanks for shopping at iGoPro Lawn Supply!

P.S. Part of us having low pricing is low overhead. We don't have a brick-and-mortar location. We do not have full-time employees as our website is designed to be self-service. We will more than likely not answer your call. Request a callback if you'd like to speak with us on the phone and be sure to include all details we would need to assist you to respect everyone's time. Thanks for understanding.

P.S.S. If you are local to the Greater Cincinnati area we do have many items in stock in Edgewood. Complete the form and we can get back to you about arranging for pickup and provide you with a code to remove the shipping fee charged at checkout since you will be picking it up.

Shipping Rates & Info

Most orders are shipped the same day if the order is received by 2:00 PM EST.

Most orders ship from the Cincinnati, OH area and arrive within 1-3 days via USPS, UPS, or FedEx

Orders Under $350


No matter what you order, if the total price is under $350, the shipping will be a flat-rate of $14.95.

*Continental US only. If outside the continental US please contact us for an international shipping quote.

Orders Over $350


If the total price is over $350, the shipping will be free unless your order cannot ship via ground shipping.

*Continental US only.  If outside the continental US please contact us for an international shipping quote.


Please read our FAQ to see our answers to the most common questions we recieve.
Why are your prices so low?
Some people tell us our pricing is 'too good to be true.' Well, in this case, it is true! The whole point of iGoPro Lawn Supply is to get people the parts and supplies they need quickly and at the lowest price possible. We simply don't mark up certain items excessively like most other dealers do. We also don't pay eBay or Amazon 15% of each sale which allows us to be very competitive along with being an online store which keeps our overhead to a minimum. We pass the savings along to you, our customer!
Is 'XYZ' in stock?
More than likely yes. We try to keep our stock-status up-to-date on our website. If you purchase something that is out of stock, we will contact you with options including an immediate full refund. You can also email us the SKU and/or product name you are looking at to inquire if it is in stock or not. Items that are know to be out of stock will be clearly noted as such on the product's page.
When will my order ship/how long does shipping take?
Most orders will ship the same day they are placed if placed before 2:00 PM EST. Most orders ship from the Greater Cincinnati, Ohio area and arrive to you within 1-3 business days depending on how far you are from Cincinnati. If you live in the Northeast or out West, shipping times could be 4-5 business days because of the distance.

Small, light, and inexpensive items may take a couple of extra days to arrive.
Are the products you sell made in the USA?
Approximately 80% of the products we sell are made in the USA! For example, some of our best selling products are made by Wall Industries and the Novae Corporation, both of these companies are based in Indiana. Copperhead lawn mower blades are also best sellers and are made in Georgia.
Who owns iGoPro Lawn Supply?
Lawn Crack, LLC. Lawn Crack is owned by Ryan Sciamanna. Ryan has made a career in the green industry doing just about everything starting from the bottom in high school! Learn more about Ryan by subscribing to the LawnCrack YouTube channel.
What's your return policy?
Our return and refund policy is clearly laid out in our return and refund policy. In short, if the error causing the need for the return was made on our customers end, they are responsible for the shipping fees. If the error was made on our side, we pay the shipping fees and will issue a full refund. Pretty simple. Very reasonable. Please contact us before making your purchase if you are unsure that you are purchasing the correct part!

Our Most Popular Products!

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If We Don't Have What You Need, Maybe Our Partners Will!

We are constantly adding new products to our website but if you don't see what you need, we can almost guarantee one of our affiliate partners will!  We may receive a small commission if you decide to make a purchase on their websites.

Amazon and eBay are great if you just need 1 or a couple of a small and light item.  It's hard to compete with them on price!

Do My Own sells fertilizer, weed control, insecticides, grass seed, and more related products that we do not carry.

The Home Depot is a great source for lawn & garden products and you maybe able to pick it up locally today.

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Frequently Asked Questions

Still have questions? Send us your question by filling out the form below, we will be happy to assist you.

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Orders fulfilled since we opened in 2019!
4.95 out of 5
We aim for 100% customer satisfaction.
Reviews left online by real customers.