Model # 89963P

Internet #100671101

Store SKU #183958

Store SO SKU #183958

Lawn-Boy 20 in. Replacement Blade For Mowers


20 in. Replacement Blade For Mowers

$19.97 /each

Frequently Bought Together

Product Overview

The Lawn-Boy 20 in. Replacement Blade For Lawn-Boy Mowers keeps your lawn mower in peak performance. The blade is designed for a high-quality cut and durability. The tri-cut steel blade cuts your lawn finer for easier mulching and bagging.

  • High-quality sharp replacement blades for a superior cut
  • Fits models 10640, 10641, 10642, 10643, 10644, 10645, 10646, 10647, 10648, 10649, 10650 and 10658
  • Tri-cut steel blade
  • Vacuum suction for superior bagging
  • Durable
  • Easy to replace




Warranty / Certifications

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Customer Questions & Answers

Hi! Are mower blades compatible usually? I have a Craftsman push lawn mower with a 20" blade and I'd like to put a mulching blade on it.

Asked by: Anonymous
Not usually Rob. The decks are designed differently to allow for mulching. And most mulching blades are bulkier are likely to contact the lower non mulching decks.
Answered by: BigD
Date published: 2016-08-24
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Customer Reviews

20 in. Replacement Blade For Mowers is rated 4.8 out of 5 by 11.
Rated 5 out of 5 by from Fit perfectly and easy to put on. ... Fit perfectly and easy to put on.
Date published: 2017-04-18
Rated 5 out of 5 by from Lawn Boy 20" Replacement Blades Very Quick shipment Blades MULCH just as good as the orignials
Date published: 2011-04-30
Rated 5 out of 5 by from A Sharp Bargain I flipped the mower on it's side, wedged a 2 X 4 between the old blade and the undercarriage and disconnected the spark plug. I used a large adjustable wrench and spun the old blade bolt out (it was really tight). I paid attention to the way the blade and spacers were facing and everything was back together in about 1 minute. The new blade looks great and cuts the grass without damaging it.
Date published: 2013-05-07
Rated 5 out of 5 by from Just like the original! It was a very good price, too! The blade costs about the same as two sharpenings.
Date published: 2012-05-22
Rated 3 out of 5 by from Arkansas to Nebraska Must have worked OK, no complains from grandson in Nebraska.
Date published: 2014-12-09
Rated 5 out of 5 by from Very good product. I had been using my mower for last 4 years, and just like an average user, I never sharpened the blade and did anything to take care of it. This year I thought I'd take a look at it to see if I can sharpen it myself or take it in to get it sharpened, but when I saw this I just eneded up replacing the blade all together. It took a total of 2 minutes to do the job. Just unscrew the bolt, take the old one out and put the new one in and screw it back in. Its that simple. If you have a bolt that's rusted it might be a different story though :). Anywho, make sure you unplug the spark plug before you work on it. Also, I did this while I was chaning engine oil, so I took the old oil out, took the blade out and put the new one in, stand it up and put new oil in and then gas and BAM! started right up. Much quicker and simpler than trying to find a place to sharpen the blade or if you do it yourself, then having to worry about about balancing the blade etc. ....well worth the money.
Date published: 2014-04-21
Rated 5 out of 5 by from LawnBoy 20" Replacement Blade The service of super Quick shipping was greatly appreciated. First make sure you disconnect the spark plug wire, and tie it away from the spark plug with a piece of string. Be very careful taking off the old blade and installing the new blade. I would recommend using a blocking-block to keep the blade from turning, and only using a boxed-end wrench or a ratch & socket.
Date published: 2010-05-11
Rated 5 out of 5 by from Perfect fit I actually bought a universal 20" blade, but it did not fit, so I went online and purchased this blade from another Home Depot. We picked it up when it was ready. The ease of all of this was great.
Date published: 2014-08-05
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