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Craftsman 37451 21" 163cc 3-in-1 Push Mower with High Rear Wheels

Item# 028W006789767001P | Model# 37451 | Added on December 14, 2016 |
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Craftsman 37451 21" 163cc 3-in-1 Push Mower with High Rear Wheels
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Description Specifications
Ready for Better Mowing Give your lawn the best manicure with the Craftsman 21" 163cc push mower with high rear wheels. Packed with a powerful Briggs & Stratton engine and multiple cutting heights, this push mower gives provides power and precision to finish the job with ease. Whether you've got uneven terrain or thick grass, readily tackle it with this Craftsman lawn mower.

  • Powered by a Briggs & Stratton® Platinum series 163cc OHV engine with 7.25 ft. lbs. of gross torque to get through any lawn care job
  • Just Check & Add™ technology means you'll never have to change the oil for the life of the engine
  • Smooth Start™ Plus starting system takes the priming and choking out of starting up your mower
  • Features a light engine, making it easier to maneuver and maintain with tool-less touch points
  • A large fuel neck makes the mower easier to fill
  • Set the ergonomic handle at one of several positions for comfortable operation all day
  • The Precision Plus cutting system uses a durable blade to mulch and bag your grass clippings
  • A 4-point deck height adjusts to 5 positions for precise cutting
  • An EZ Empty Dust Blocker rear bag collects dust and makes it easy to clean out
  • 8" front wheels and 11" rear wheels let you more easily maneuver while operating
  • Sure-Grip traction tires give you easier control over all types of terrain
  • A 3-in-1 design lets you bag, mulch or discharge your clippings off to the side
This product comes with:
Owner's Manual (1)Product Warranty
WARNING: California Residents - Proposition 65
Ratings & Reviews

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(130 Ratings)
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Most Helpful Reviews:

By RandyCandy
April 24th, 2017
Whats going on with Craftsman ?

Okay, I had a Craftsman 5500 series with a 158 cc engine with a 22 inch blade. Bought it back in April 11, 2008. Time came to buy another mower, I bought a Craftsman online, returned it. I took it to a Sears store 30 miles away. Great service, 30 day warranty. I saw what was in the store, received a refund and went all over the city looking for a Lawnmower. The Main reason for my returning this mower was the handle height. I'm 5 foot 9 inches tall the handle was below belt height. Anyone that's pushed a lawnmower for years knows that is a back breaker! I went to every Lawn and Garden stores in the City. All the same Low handle height. Went back to Sears were I remember this Mower had the Highest handle height on all the floor models. Brought it home, Disappointed the handle height was not the same as the floor model I saw, But still was the highest of them all. The handle height on this mower is just a little above the belt waist level on me. Now the other issue, same as the mower I returned. The gas cap on these mowers in Not a screw On, The gas cap is like a twist a lock. I was mowing along a row of small shrubs the tiny branches rubbed against the Gas Cap and Poof it comes Off. Luckily there is a Plastic strap attached to mower so gas cap can't be lost! Break out the Craftsman weed trimmer so as not to get close to the small shrubs. I could not get mower to cut low, it was like pushing a plow. I adjusted the wheels as low as I could easily push the mower. I would say this mower works on different grass types. This mower does do the job , on high grassy areas cut right through with No Problem. I had maybe the same experience out of the box. On one of the wheels. The front left wheel was not mounted right at factory, but a simple fix. I just turned it to were slot meet the bracket and it locked into place. Employee issues at the factory most likely. This engine Does Not have a Primer to start the engine, Unbelievable! I followed the starting steps as in the manual. Pulled the cord 5 times did not start. I have owned Craftsman push mowers all my Day, so from experience I reached under tugged the linkage on the carburetor 4 times. Then pulled the cord and the sweet sound of the engine roared. This mower has a Super Sweet Powerful Engine. The air filter adds to the refinement of the engine like top notch. The Never Change Oil for Life has yet to be seen. I'm not using the grass catch bag. This mower like the other Craftsman mowers Mulch Door is permanently attached, if you want the Discharge Guard just lift the Mulch Door insert the Discharge Guard and its attached. I have been pushing Craftsman Mowers for over 30 years. This Craftsman 725 e x i Series for the Price is the only push mower out there that works for Me. Though Craftsman Designers and Management could Do Much Better.

14 found this review helpful
By raleigh2022
April 8th, 2017

I decided to treat myself to a new mower this year. I was excited to take this out of the box and give it a try. The first one that arrived, one of the back wheels wouldn't lock into position. So, it would just fall down every time I tried to raise the deck of the mower. I thought, no big deal, I will just return it and get another one. One defect isn't that bad. I never even got a chance to start it. The customer service was excellent. Very easy to return. UPS picked up the first one. Second one arrived on only 2 days. Sweet. My new mower will be ready to go (I thought). I unbox the second one roll it out and try to raise the deck of the mower. Same problem, opposite side. It won't hold the latch so it just keeps falling down. Again, customer service was good for the return, but, I expected better quality. This is a simple defect, but, I am really disappointed that these either get damaged in shipping or there is no quality control on the smaller details of the mower. I ultimately don't know how many stars to give this thing because I never got to start it up. I will be sticking with my old mower for now.

13 found this review helpful
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Eric Montgomery
| Earned 102 community points in Craftsman

Reliable and serviceable when not used for an extended period. No issues with mine..


I too had an issue with restarting after nearly a year of sitting due to a long illness. One shot of gumout beyond the air filter, which is very easily and quickly removed btw, and in one pull, started right up just like the first day I bought it.

November 8th
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i thought it was great product.


I start using on April 2018. my backyard is like 100sqf. the front is like 30sqf. I cut my lawn in les then 20 minutes. so I was using every Saturday so I skip one because of vacation. so when I try to cut my lawn won't start. I check the sparkplug was wet like fuel with oil. the air filter was wet smell like fuel then I saw was leaking something in front of the carburetor I opened it was wet so I dry and I try one more time won't work. so I really disappointed.

August 8th via
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Good power & surpisingly light weight>

July 3rd via
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Upset DD

Doesn't Start


I have this engine on a Earthquake rototiller. I emptied the gas out of the unit. Now, after a winter of sitting, I have refilled the tank with new, premium gas and tried to start the engine. After 15 pulls, I checked the spark plug and it is fine. I cannot believe that, after one year I am going to have to pay for a service call. I have owned a number of other pieces of equipment with small engines on them and have never had any trouble. This is the worst!!!!!!!

May 31st via
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have it

21'' push mower


great product love it start on one pull

May 19th via | The reviewer indicated they are affiliated with this product
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maryforeman maryforeman
Craftsman 37451 21" 163cc 3-in-1 Push Mower with High Rear Wheels
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March 29th, 2017
Eric Montgomery
By Eric Montgomery
November 8th, 2018