Easy
15-30 minutes
An authentic OEM supplied replacement part that is specially manufactured for use with Lawn Boy and Toro walk behind lawn mowers. This hi-lift blade is designed with larger wind wings that will increase the airflow aiding in bagging grass clippings. This part is made from durable metal and it is sold individually.
Blade (21-inch) 612543-03
OEM part for: Lawn Boy, Toro
Part Number: 612543-03
$34.86
In Stock
Ships within 1 business day 
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Compatibility
This Blade (21-inch) will fit the following 823 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Toro
Lawn Boy
Show More Compatible ModelsThis item works with the following types of products:
- Lawn Mower Parts
This part replaces obsolete part #: 609988, 603703, 682915, 611240, 683682, 612543
Customer Part Reviews ?
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You had the right part !
Arrived on time and packaged well for delivery. This was the correct part, now my 20+ year old lawn boy mower is cutting grass great again. Thanks
Guest -
April 29, 2022
Verified Purchase
Lawnboy #6461
Part worked great, shipping was good.
Will be using them again.
Guest -
April 11, 2021
Verified Purchase
Easy to find my parts for an old mower
They arrived in good time fit perfectly in my old lawnmower it’s like new. Super!
Guest -
March 17, 2020
Verified Purchase
The same order came twice, so I have 2 of the same thing.
how do I return 1 of these orders. The parts were fine.
Guest -
June 3, 2019
Verified Purchase
Perfect Fit!
Got the exact blade I needed, hard to find replacement parts for old mowers. Shipped quickly.
Guest -
May 26, 2019
Verified Purchase
Lawn mower blade
Blade could have been a bit sharper
Guest -
June 18, 2019
Verified Purchase
Questions & Answers ?
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Does this fit my product?Questions & Answers for Blade (21-inch)
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Customer Repair Instructions ?
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.
Replace old worn blade
Richard - May 7, 2017
👍 2 of 2 people found this instruction helpful
Tool Type
Lawn Mower
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Socket set
Parts Used
1 Removed old blade with socket wrench
2.Clean bottom of mower deck
3.Installed new blade using socket wrench
2.Clean bottom of mower deck
3.Installed new blade using socket wrench
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Lawn mower blade was wore out, not sharp, couldn't cut butter
Frank - July 17, 2017
👍 1 of 1 people found this instruction helpful
Tool Type
Lawn Mower
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Wrench Set
Parts Used
Replaced the old blade with the new. Very easy!
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Blade wore out
Dan - June 21, 2020
Tool Type
Lawn Mower
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Socket set
Parts Used
Removed Nut holding blade and mulching blade replaced new blade and tighten bolt
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Back wheels were worn out. 23 years old. New mulch and regular bkade. New air filter. All from normal wear and tear.
Norm - May 30, 2019
Tool Type
Lawn Mower
Difficulty
Easy
Time
15-30 minutes
Tools Used
Socket set, 2x4 for blade replacement
Removed bolt on wheel and replaced with new wheel. Replaced filter. Replaced mulch and regular blade with ratchet and socket. Used 2 x 4 to lock blade while it was loosened.
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Rough idle.
Travis - July 19, 2017
Tool Type
Lawn Mower
Difficulty
Medium
Time
15-30 minutes
Tools Used
Screwdriver, Pliers, Socket set, Wrench Set
Removed the carb assembly and repaired each part ordered. Runs like a champ!
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Both Cable's we're kinked and needed replacing also replaced blade with new
Clyde - July 13, 2017
Tool Type
Lawn Mower
Difficulty
Easy
Time
30-60 minutes
Tools Used
Screwdriver, Pliers, Socket set
Took screw's from drive cover over spring and clutch unhooked spring, pulled spring through cover then replaced spring through cover and hooked back on lever put screws, back in cover threaded cable up the handle and re attached to swing handle.
Next I installed brake cable making sure cable was on
Next I installed brake cable making sure cable was on
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Mower blade and air filter needed to be replaced
GEORGE - March 12, 2017
Tool Type
Lawn Mower
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Socket set
Put block of wood in the housing to stop the blade.
Removed the blade nut, then the blade
Put the new lade on then tightened the nut
Removed the air filter cover and the old filter
Installed the new filter and replace the cover
Removed the blade nut, then the blade
Put the new lade on then tightened the nut
Removed the air filter cover and the old filter
Installed the new filter and replace the cover
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20 yrs old never sharpened decided to replace with new parts.
joseph - February 9, 2017
Tool Type
Lawn Mower
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Adjustable Wrench
Not only did I replace the blade and fan mulching for my Lawn Boy, I also ordered and replaced the motor on my ceiling fan unit without buying the complete unit. I never heard of ereplacementparts.com but have since told all my friends about your web site. Fantastic. Will always check your site in the future.
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Blade and mulching fan were both worn out.
Alan - January 15, 2017
Tool Type
Lawn Mower
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Socket set
One nut holds both the mulching fan and blade to the lower crankshaft. Remove the nut and install both new parts.
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Blade was chipped and cracked
mike - July 26, 2016
Tool Type
Lawn Mower
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Socket set
Parts Used
Removed the old one and attached the new blade.
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OEM stands for Original Equipment Manufacturer and means the part you’re buying is sourced directly from the manufacturer who made your product. At eReplacementParts, we sell only genuine OEM parts, guaranteeing the part you’re purchasing is of better design and of higher quality than aftermarket parts.
Our product descriptions are a combination of data sourced directly from the manufacturers who made your product as well as content researched and curated by our content & customer service teams. This content is edited and reviewed internally before being made public to customers.
Our customer service team are at the ready daily to answer your part and product questions. We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
All our part reviews are solicited directly from other customers who have purchased this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
Based on data from past customer purchasing behaviors, these parts are most commonly purchased together along with the part you are viewing. These parts may be necessary or helpful to replace to complete your current repair.
All our installation videos are created and produced in collaboration with our in-house repair technician, Mark Sodja, who has helped millions of eReplacementParts customers over the last 13 years repair their products. Mark has years of experience in selling and repairing both commercial and residential products with a specialty in gas-powered equipment.
This data is collected from customers who submitted a repair instruction after replacing this exact part. Customers can rate how easy the repair was to complete and how long it took. We aggregate this data to provide a repair rating that allows customers to quickly determine the difficulty and time needed to perform their own repair.
