Model # 12A-A1BA729

Internet #204686154

Store SKU #339796

Store SO SKU #639830

Yard Machines 21 in. 140 cc OHV Briggs and Stratton Walk Behind Gas Self Propelled Mower
0043033566433

Yard Machines

21 in. 140 cc OHV Briggs and Stratton Walk Behind Gas Self Propelled Mower

  • 140 cc Briggs & Stratton 500e Series Engine
  • Front Wheel Drive Self-Propelled
  • Dual lever height adjustments
$24900 /each
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Frequently Bought Together

Installation Options

Product Overview

Mower Features
Gas-Powered
Terrain - Flat
2 Year Warranty
21in Cutting Width
1 Blade
cutting options: bag, mulch
  • 140 cc Briggs & Stratton 500e Series Engine
  • Front Wheel Drive Self-Propelled
  • Dual lever height adjustments
The powerful Briggs and Stratton engine delivers solid, efficient power to tackle the yard. This 21 in. Self-Propelled Mower offers 6 cutting positions to cut grass down to size; the single forward speed unit offers easy maneuverability. This unit also offers mulching which aides in healthy turf development for your lawn and rear bagging option for easy-clean-up.
  • 140 cc Briggs and Stratton 550e OHV engine with primer
  • 0.8 Qt. gas capacity
  • SAE 30 arnold brand oil
  • 18 oz. oil included
  • 21 in. steel deck
  • Dual lever, 6-position cutting height
  • Height range 1.25 in. to 3.75 in.
  • Rear bagger included
  • Integrated mulch plug
  • Loop steel handle with indent
  • 1 forward speed bail control
  • 8 in. front wheels
  • 8 in. rear wheels
  • 2-years limited warranty

Product Overview

  • 140 cc Briggs & Stratton 500e Series Engine
  • Front Wheel Drive Self-Propelled
  • Dual lever height adjustments
Model #: 12A-A1BA729
Sku #: 339796
Internet #: 204686154

The powerful Briggs and Stratton engine delivers solid, efficient power to tackle the yard. This 21 in. Self-Propelled Mower offers 6 cutting positions to cut grass down to size; the single forward speed unit offers easy maneuverability. This unit also offers mulching which aides in healthy turf development for your lawn and rear bagging option for easy-clean-up.

California residents: see   Proposition 65 information

  • 140 cc Briggs and Stratton 550e OHV engine with primer
  • 0.8 Qt. gas capacity
  • SAE 30 arnold brand oil
  • 18 oz. oil included
  • 21 in. steel deck
  • Dual lever, 6-position cutting height
  • Height range 1.25 in. to 3.75 in.
  • Rear bagger included
  • Integrated mulch plug
  • Loop steel handle with indent
  • 1 forward speed bail control
  • 8 in. front wheels
  • 8 in. rear wheels
  • 2-years limited warranty

Info & Guides

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Name 21 in. 140 cc OHV Briggs and Stratton Walk Behind Gas Self Propelled Mower 22 in. Kohler Low Wheel Variable Speed Gas Walk Behind Self Propelled Lawn Mower 22 in. Kohler High Wheel Variable Speed Gas Walk Behind Self Propelled Lawn Mower 21 in. Variable Speed All-Wheel Drive Gas Walk Behind Self Propelled Lawn Mower
Brand Yard Machines Toro Toro Lawn-Boy
Ratings (450) (1326) (3461) (351)
Power Type Gas Gas Gas Gas
Drive Type Front-wheel Drive Front-wheel Drive Front-wheel Drive 4 Wheel Drive
Features Bagger,Blade Brake,Foldable handle,Mulching Lawn Mower,Rust resistant deck,Tool-free adjustments Bagger,Deck cleanout,Foldable handle,Mulching Lawn Mower,Tool-free adjustments Bagger,Deck cleanout,Foldable handle,High wheel,Mulching Lawn Mower,Tool-free adjustments Adjustable Handlebar,Bagger,Mulching Lawn Mower,Tool-free adjustments
Refurbished No No No No
Size of Yard 1/4 - 1/2 Acre 1/4 - 1/2 Acre 1/4 - 1/2 Acre 1/4 - 1/2 Acre
Start Type Pull Pull Pull Pull
View Product View Product View Product View Product

Specifications

Dimensions

Assembled Depth (in.)
70 in
Assembled Height (in.)
36 in
Assembled Width (in.)
22 in
Blade Length (in.)
21
Cutting Width
21 inches
Front Wheel Size (in.)
8
Mower Deck Width
21
Rear Wheel Size (in.)
8

Details

Assembly Required
Yes
CA (CARB) Compliant
CARB Compliant
Cutting Options
Bag,Mulch
Deck Material
15 Gauge Steel
Deck Type
Stamped
Drive Type
Front-wheel Drive
Engine Displacement (cc)
140
Engine Make
Briggs and Stratton
Engine Torque (ft.-lb.)
0
Features
Bagger,Blade Brake,Foldable handle,Mulching Lawn Mower,Rust resistant deck,Tool-free adjustments
Fuel Tank Capacity (gallons)
0.2
Included
Engine oil
Lawn Mower Type
Self-Propelled Lawn Mower
Maximum Cutting Height (in.)
3.75
Minimum Cutting Height (in.)
1.25
Number of Blades
1
Number of adjustable handlebar positions
0
Oil Capacity (oz.)
15
Power Type
Gas
Product Weight (lb.)
72lb
Recommended Oil Type
SAE 10W-30
Refurbished
No
Returnable
90-Day
Size of Yard
1/4 - 1/2 Acre
Start Type
Pull
Terrain Type
Flat
Walk Behind Mower Type
Self Propelled

Warranty / Certifications

Manufacturer Warranty
2 year limited warranty

Specifications

Dimensions

Assembled Depth (in.)
70 in
Assembled Height (in.)
36 in
Assembled Width (in.)
22 in
Blade Length (in.)
21
Cutting Width
21 inches
Front Wheel Size (in.)
8
Mower Deck Width
21
Rear Wheel Size (in.)
8

Details

Assembly Required
Yes
CA (CARB) Compliant
CARB Compliant
Cutting Options
Bag,Mulch
Deck Material
15 Gauge Steel
Deck Type
Stamped
Drive Type
Front-wheel Drive
Engine Displacement (cc)
140
Engine Make
Briggs and Stratton
Engine Torque (ft.-lb.)
0
Features
Bagger,Blade Brake,Foldable handle,Mulching Lawn Mower,Rust resistant deck,Tool-free adjustments
Fuel Tank Capacity (gallons)
0.2
Included
Engine oil
Lawn Mower Type
Self-Propelled Lawn Mower
Maximum Cutting Height (in.)
3.75
Minimum Cutting Height (in.)
1.25
Number of Blades
1
Number of adjustable handlebar positions
0
Oil Capacity (oz.)
15
Power Type
Gas
Product Weight (lb.)
72lb
Recommended Oil Type
SAE 10W-30
Refurbished
No
Returnable
90-Day
Size of Yard
1/4 - 1/2 Acre
Start Type
Pull
Terrain Type
Flat
Walk Behind Mower Type
Self Propelled

Warranty / Certifications

Manufacturer Warranty
2 year limited warranty

Questions & Answers

I bought this product Sept.2017. I have used it twice. Would use it more but I can't get it to ...

I bought this product Sept.2017. I have used it twice. Would use it more but I can't get it to start. Do you have a repair shop that you use.
Asked by: joy
We had a very dry summer so I rarely used mine. It could be that your gas has gone bad. I'd dump the gas tank out, go buy some fresh gas after you also empty the gas can. I always use marine grade sta-bil and then never have a problem with the gas going bad.
Answered by: Patrick
Date published: 2018-03-30

Is it easy to start up?

Asked by: Becky
Yes it is. Their is a primer on the left side you push the button 3 or 4 times. Then hold the blade lever down and pull. Real easy pul start
Answered by: antuck
Date published: 2017-10-02

what kind of gas does it use?

what kind of gas does it use?
Asked by: Kaitlyn
Unleaded regular,no more than 10% ethanol
Answered by: Kenny
Date published: 2017-11-07

is the set up of the 12A-A1BA729 fairly easy

Asked by: RJL173
Not if you are not handy, it took me a long time and it didn't say anywhere that in order to pull the engine chord you need to push on the "run" handle
Answered by: Had2return
Date published: 2018-03-20
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Customer Reviews

21 in. 140 cc OHV Briggs and Stratton Walk Behind Gas Self Propelled Mower is rated 4.0 out of 5 by 450.
Rated 1 out of 5 by from It does not throw the grass into the bagger very... It does not throw the grass into the bagger very well. I have to unstop it all the time.
Date published: 2018-03-27
Rated 5 out of 5 by from Very happy with my Yard Machine! I have owned several push mowers over the years. Two Craftsman a... Very happy with my Yard Machine! I have owned several push mowers over the years. Two Craftsman and a Troy Built. This one is just as good if not better. Very easy to assemble. Just added the oil and gas. Pushed the primer button 3 times and it fired right up. I have mulched with it and used the bag catcher. Very happy with both methods. The only thing I noticed is. It's a little on the loud side. But I wear hearing protection. So it doesn't really matter.
Date published: 2018-03-10
Rated 3 out of 5 by from All-in-all it's a decent machine and fit the bill for... All-in-all it's a decent machine and fit the bill for the amount I wanted to spend. Two items of concern: 1) It's usually hard to start at first (cold engine) but subsequent starting isn't a problem. 2) Happening only one time, it stopped for no reason at all while mowing. Pleanty of fuel in the gas tank and no obstructions on the lawn had me puzzled why this should have happened. As long as it keeps working I'll be satisfied with it. - J.G.
Date published: 2017-11-01
Rated 4 out of 5 by from Lawnmower does an excellent job once you are able to start it! I followed the instructions to eve... Lawnmower does an excellent job once you are able to start it! I followed the instructions to every step of the way (since I this was my first lawn mower ever) and the instructions failed to mention that you have to pump the gas with your finger first, then it becomes automatic (Red rubber hemisphere on the side of the motor). Other than for the lack of complete instructions, I recommend this product.
Date published: 2017-12-05
Rated 1 out of 5 by from I bought this in sept . near the end of the mowing season. It worked great the first time I used... I bought this in sept . near the end of the mowing season. It worked great the first time I used it . Second time it was a little hard to start. Third time it was really hard to start. Now, the fourth time i tried to start it --nothing. I am not sure what to do about this, but I have had plenty of mowers and never had this problem.
Date published: 2018-01-07
Rated 4 out of 5 by from Snappy little machine easily does what it was purchased for.... Snappy little machine easily does what it was purchased for. The only critique I will offer is that the grass catcher sits at such a high angle that it cannot be filled before it needs to be emptied. The grass sits at the chute and eventually blocks more grass from entering.
Date published: 2017-12-26
Rated 4 out of 5 by from for the money it's very good. Starts on the first try and pulls easy. Wheel height easy to adjust... for the money it's very good. Starts on the first try and pulls easy. Wheel height easy to adjust. Easily assembled. Although it is self propelled it only has one speed...slow so if you're a fast walker like I am then you end up pushing it. Thank goodness I like the exercise.
Date published: 2017-12-05
Rated 2 out of 5 by from To me, a self-propelled means that the mowers tires turn... To me, a self-propelled means that the mowers tires turn enough to propel the mower. That is not the case. This mower did not aid in pushing its self at all. This is a good $149.99 mower. This is not a 200.00+ mower. I returned it in one day as this is a joke of a mower.
Date published: 2017-11-01
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