Yard Machines 159cc 21-inch Review

Yard Machines 159cc 21-inch

Gardening Freaks Rating:-
  • 21-inches steel deck.
  • Starts quickly, on first pull only.
  • Easy to use.
  • Adjustable handle.
  • Not for large yards.

Yard Machines 159cc 21-inch is a self-propelled mower perfect for mowing small-medium sized lawns or yards (up to 1 acres). If you are looking for a gas-powered mower having features like a robust engine, sharp blades, height adjustable handle, dual cutting system, and is easy to start, this is for you.

Yard Machines 159cc 21-Inch self-propelled mower is manufactured by MTD Products Inc., a US-based company founded in 1932. The yard improvement products, especially lawn mowers, from MTD, are sold globally through different distribution channels.The kind of quality, the value they infuse in their products and the service they provide to customers are the primary reasons people prefer buying their lawn mowers.The Yard Machines 159cc 21-inch self-propelled lawn mower is nothing less than a beast on flat terrains.

Yard Machines 159cc 21-inch Review

an affordable self-propelled mower

 If you are looking for a gas-powered mower having features like a robust engine, sharp blades, height adjustable handle, dual cutting system, and is easy to start, this is for you.

Performance and Cut Quality

Yard Machines 159cc 21-inch self-propelled mower features a robust 159cc OHV (overhead valve) engine which provides enough power to do mowing effortlessly. There are some mowers which requiring manual choking or priming of an engine and as a result, take a lot of time to start. But this mower from Yard Machines, with an auto-choke, allows the users to start it by just pulling a cord. I find that by the time some mowers with manual choking starts, it mows 10-15% of the lawn. Coming to the cut quality, the cutting blade in this mower is of 21-inches with which you can trim a wider area quickly and efficiently. If you are thinking to use it on sloppy terrains or hilly regions, I will suggest looking for some other model.

Ease of Use

Using this mower is quite easy. It starts in a single attempt and is self-propelled (front wheel drive) which means you don’t have to use your energy to move it forward. Yes, you just need to give directions and it will do effective and efficient mowing on its own. This will not only save your time but energy as well. The user-friendly height adjustment system with the dual lever of this mower offers six different cut-height positions (from 1.25” – 3.75”) so that you can cut both short and long grass efficiently. This way Yard Machines 159cc 21-inch mower makes sure that you achieve the kind of lawn you always wanted.

Special Features

Today the trend is to put some special, different from others, features in a mower and make it attractive. But, this is not the case with Yard Machines 159cc 21-Inch self-propelled mower. Its primary features are also its special features. The 159cc OHV engine is its first special feature,it is simply made to last long. As you know I have used this machine the most, I didn’t find it breaking a sweat.Even if your residential lawn has a few rough patches and some small weeds, it will deal with them also.Another special feature is its price. At a price of $299.99, it is very difficult to get a powerful, efficient, and long-lasting self-propelled mower that runs on gas and has a front-wheel-drive along with single speed transmission. This is a rare combination.


Yard Machines 159cc 21-inch mower measures 36 x 23 x 17 inches and weighs just 71.9 pounds. It means this mower is compact and lightweight enough to move easily in your small-medium sized lawn. After usage, you can easily store it in your outdoor closet or garage. Another benefit of its design is that any member of your family can use it without any expertise. I am not in favor of kids using a lawn mower, so keep them away. Additional positive feature of this mower’s design is its adjustable handle which allows the users to adjust it according to their height. So, with this mower, your height is never an obstacle. It comes almost pre-installed which means when you take it out of the box, it takes a few minutes to make it ready to mow your lawn.

Cost Effectiveness

Yard Machines 159cc 21-inch mower ranks higher on cost-effectiveness index. Starting from its price of $299.99, it helps you save money. Also, it’s mulching feature prevents you from buying fertilizer for your lawn. Once purchased, you can use it regularly for a very long time which means you don’t need to invest in another mower for many years. This is really a big saving in the long run. Its steel deck, as well as the cutting blade, are powder-coated which means they remain protected from rust, they last long. This quality again represents its cost-effectiveness. I found one reason which might hurt your pocket – one of its easy-to-use feature, self-propelled technique, keeps it 4” – 5” away from the target. If you have flower beds in your lawn and they are surrounded by weeds, you will feel the need to invest in another mower.

Grass Collection and Discharge

It’s a big disappointment to see such a good performing mower without bagging feature. I really want to see the facility to attach a bushel-bag at its back. One thing most people don’t like is to collect and pick the clipped grass from their lawn after every mowing session.Yard Machines has a self-propelled model featuring rear bag but it has a 140cc engine, not so powerful. However,it comes with a 2-in-1 cutting system that allows mulching and side-discharge.So, you don’t need to worry anymore to enhance the fertility of your lawn because this mower will take care of it. The side discharge feature of this mower will leave the grass clippings in a row. Yes, you have to pick them up afterward.


The ergonomic and compact design of Yard Machines 159cc 21-inch mower ensures it easily reaches every part of your lawn. The front and rear wheels are bigger, of the same size (8-inches) which means you can move it perfectly on flat terrains but will face difficulties on uneven grounds.The good thing is that it features treaded tires. It implies you can expect optimum traction even while cutting bigger grass or during wet conditions. With front-wheel self-propelled drive, you can mow your lawn effortlessly and retain all your energy for other tasks. Some mowers fail to make quick turns but this is not the case with Yard Machines 159cc 21-inch mower and you can again give the credit to its front-wheel-drive system.


When it comes to maintenance of Yard Machines 159cc 21-inch mower, you need to do certain things. Do not forget it belongs to the category of gas mowers which require proper attention all the time. After every use, clean under the deck with a blower and make sure you check the engine oil also. It will be best to change the engine oil after every 50 hours of use. The air cleaner and carbon canister filter need to be serviced after every 100 hours of use. You should also replace the fuel filter after using it every 100 hours. I have made a habit to clean it and check its oil after every use. This is necessary if you want it to serve you for a long time. As a support, this lawn mower comes with a limited warranty of 2 years.

What is in the box?

When you purchase this mower, you will find the following things in its box:

  • Lawn Mower – 1
  • Operator’s Manual – 1
  • Oil – 1
  • Warranty Document – 1

Pros: Things We Love!​

  • Equipped with a powerful 159cc OHV engine.
  • 21-inches steel deck.
  • Available at an attractive price.
  • Lightweight and compact design.
  • Starts quickly, on first pull only.
  • Easy to use.
  • Front wheel self-propelled drive saves the operator’s energy.
  • Adjustable handle.

Cons: Points of Improvement

  • Cannot be used for bagging the grass.
  • Not for large yards.
  • Can be used only on flat terrains.

Frequently Asked Questions

Q: Does it start with one Pull?

A: Yes, it easily starts in one pull every time. Also, you don’t need to prime it before starting.

Q: Is it two strokes or four strokes?

A: It has a 4-stroke engine.

Q: Can we attach a bag to this mower?

A: No, this mower doesn’t offer bagging grass. The grass needs to be collected manually from the lawn after mowing.

Q: What oil grade is to be used with this mower?

A: This mower requires a 4-stroke motor oil. Make sure you find the designation SAE 10W-30 on motor oil’s pack.

Q: Does it have mulcher?

A: Yes, it has a mulcher. Don’t forget to check its position on bumps.

Q: Does it come with oil?

A: Yes, it comes with oil to put in the mower.