Lawn Boy 17734 21 Self Propelled Gas Powered Lawn Mower Review

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In Brief: Lawn Boy 17734 21 Lawn Mower Review

Lawn-Boy 17734 is a mower you can count on. It is affordable and easy to operate, coming with a few features that make it a great lawnmower. Above all this, it offers a 2 years Full Warranty, and 3 years of Tru-Start Commitment, which makes it a great option for a high-quality mower with plenty of value for money.

If you are a homeowner looking for a lawnmower that you can count on and has basic functions, then Lawn-Boy is your go-to company. Their lawnmowers get the job done.

Coming with a somewhat higher power, their quality gas-powered mowers do not require you to adjust the height your grass needs to be cut, and go over your lawn twice.

A 6.5ft.-lbs Kohler XTX OHV engine gives the Lawn-Boy 17734 RWD Mower the power it needs to cut through high and tough grass.

This particular mower comes with a rear-wheel-drive that provides the mower with better traction, and it gives you better control of the mower in different cutting conditions and different types of terrain.

It also doesn’t need you to pull a cord in order to start it since it comes with an Electric Start.

Key Specifications Of Lawn Boy 17734 21 Lawn Mower

Lawn-Boy 17734 21-Inch 6.5 Gross Torque Kohler Electric Start XTX OHV, 3-in-1 Discharge Self Propelled Lawn Mower

Lawn-Boy 17734 measures 40.5 x 22.3 x 37.7 inches, which makes it a very compact mower that is gas-powered, and compact is not a word readily associated with lawnmowers.

You can easily find room for it in a corner. It weighs just 72 lbs, even though it has a steel deck.

Most lawn mowers have a standard color, red. This one, however, comes in a nice green, making it more pleasant to the eye, along with the 7 inches front wheels and 8 inches rear wheels.

Another very useful feature I’ve come across with this particular lawnmower is that it has an adjustable handle. Taller people usually have to hunch over the mower, but this feature covers that.

Once delivered, the lawnmower can be mounted rather quickly because you just need to pour the oil and tighten the handle’s bolts after you attach it. Using it might take some more time.

Having an electric start, you need to charge the battery, which can be a rather slow process.

It is a good mower for ½ acres yards or lawns, but it won’t cut bushes.

Here is a video where you can see how it’s used, and learn how to make the best out of it.

Quick table with all Key specs of Lawn Boy 17734 –

6.5 ft.-lbs. Gross Torque Kohler® XTX OHV
Engine Displacement
Cutting System
Cutting Width
Height of Cut
6 Positions from 1.25" - 3.75"
75 lbs
Self-propel System
Variable Speed RWD
Deck Material
Wheel Height
7" Front, 8" Rear

Unique Features

When it comes to what makes this particular lawnmower stand out, there’s one main feature that comes to mind: the tri-cut system.

Tri-cut System

The Lawn-Boy 17734 has a Tri-Cut system, giving it stunning mulching capabilities, which will result in a great cut quality of your lawn.

Having a bigger bag of 2 bushels and the bigger rear wheels adds to this quality, making it an excellent mix. This helps you have a perfectly manicured lawn in no time, with minimum efforts.


Power, Design, And Durability


When it comes to power, there are 2 essential features to mention. The first one is the 149ccKohler® XTX OHV engine, which has proven to be reliable, robust, and quick to start.

Even if it doesn’t require having its oil changed, you still have to check its oil level before each use.

The second feature is the Smart-Choke technology it comes with. This automatically adapts the amount of fuel needed to start the engine.

In other words, this lawnmower can adjust the fuel usage, so it minimizes the quantity required each time you start it and use it.


The Lawn-Boy 17734 is very easy to maneuver over a lot of types of terrains, making it a very good walk-behind mower. It moves very efficiently over flat surfaces, uneven terrains, sloped terrains, and hilly regions.

The wheels do have to be adjusted according to the terrain you’re using it on, but that’s easy to do.

It is equipped with 2 levers that adjust the wheels’ height, one placed in the front, and one in the back. It has very good traction due to the rear-wheel-drive, so it is adaptable to different conditions of cutting.

Even if it sounds like it can do any job, we don’t advise you to use it over very inclined slopes. You need to remember that it is designed for residential use.


The Kohler engine we mentioned before is what makes the land mower reliable and durable. It’s been created to last for a long time with little maintenance and enough power to be able to give even clean cuts.

Furthermore, the deck is made of steel, which further improves its life.

Cut Quality And Available Options

The tri-cut cutting system is what gives it the cutting efficiency. The height you want your grass cut is adjustable, from 1.25 inches, up to 3.75 inches.

As with other mowers, this model won’t do good if you intend to cut wet grass because things will get clumpy under the deck and might cause your engine to die.

So, use it on flat terrain, hilly terrain, and uneven terrain with dry grass, and you shouldn’t come across any problems.

Performance And Ease Of Use

Equipped with a mulching function powered by the Kohler engine, this mower performs with ease in all types of lawns or yards, with a few minor exceptions like wet grass of very rough terrain.

It gives a very reliable feeling from the first use.

As a bonus, it makes very little sound. This is worth taking into consideration if you are worried about disturbing your neighbors.

I think the Lawn-Boy 17734 has a very good value for money because it moves very well for a mower powered by gas.

It is very comfortable to use even for a six-foot person, who won’t need to hunch over the mower when using it, and it’s a fast mower, having a 21-inch cutting deck.

Its stability is given by the smaller front wheels and bigger rear wheels combination.


Ease Of Maintenance, Repairs, And Warranty

When it comes to maintenance, it doesn’t need any special attention, just regular maintenance things. You need to check its oil levels before every use.

The grass clippings and debris below need to be cleaned after every use. The air cleaner should be checked after every 25 hours of use.

However, the company suggests the air cleaner be replaced after 100 hours of use.

Another thing that you might want to take into consideration is buying a cover for your lawnmower.

This offers more significant overall protection of the entire mower because it covers the rear bag as well, and it’s easier for you to store outside.


Lawn-Boy Inc offers a 2 years full warranty for any Lawn-Boy product and will repair defects of materials or workmanship for no cost.

For more information about the warranty, go here>

Price Of Lawn Boy 17734 21 Lawn Mower

This particular lawn mower isn’t quite cheap, and an electric mower would save you more money. But if you want to go for a gas-powered mower, this one really is very cost-effective.

Other mowers with the same functions will have a higher price. The mulching option that fertilizes the grass and the way it cuts grass (you won’t need a Weed Wacker) makes it very reasonably priced.


Who Should Buy It?

People with uneven terrains that would opt for a gas running lawn mower would definitely find good use out of this product. It is well-engineered, powerful, durable, and comes with a decent price for those who have a smaller yard or lawn.

Why We Like It

The Lawn-Boy 17734 is a durable and reliable lawn mower due to the 21-inch steel deck, strong engine, and the Tri-Cut system that can cut through any grass and gives the amazing quality of cut.


Last update on 2024-05-30 / Affiliate links / Images from Amazon Product Advertising API

About Michael Adams

Michael has been providing handyman services for the last 14 years. He also contributes as a writer sharing his experience and experience for design projects.

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