What Are The Differences Between Kawasaki FR and FS Engines?


How do you judge a mower engine quality? After all, you can’t cut or mow grass smoothly and fast with a mower that can’t show reliable performance. Kawasaki FR and FS engines are the two top-quality mowers in the market.

So, what are the differences between Kawasaki FR and FS engines?

Quality and price are the parameters of differences between Kawasaki FR and FS engines. The Kawasaki FR series has many top-end mowers that are mainly suitable for household purposes. On the other hand, the Kawasaki FR series has expensive mowers, perfect for commercial purposes. Therefore, you can do your tough turf work with the FS series and personal work with the FR series.

What Are The Differences Between Kawasaki FR And FS Engines?

What Are The Differences Between Kawasaki FR and FS Engines?

Knowing the differences between Kawasaki FR and FS engines will help you choose the best lawn mower for your garden. This is why we are going for a comparison session to learn about these two series in-depth level. Let’s move on!

1. Both Are 4-Cycle Engine

Both Kawasaki FR and FS engines have four-stroke engines. Hence, for every rotation, the piston makes a pressurized stroke followed by an exhaust stroke. As a result, you will notice one spark plug fire per rotation or once every four strokes.

2. Cast Iron Cylinder Liners Vs. Cast Iron Liners

cast iron cylinder liners

The Kawasaki FR series has cast-iron liners, while the Kawasaki FS series cast iron cylinder liners.

A multi-cylinder block includes cylinder liners, which is a vital part of it. The working space of a piston and its sliding surface is determined and shared by these two components.

Special alloy cast iron is used to make the cylinder liners, and you will find this material is more resistant to abrasion than gray cast iron with flake graphite.

Though both series have cast-iron liners, the Kawasaki FS series is more efficient than cylinder liners.

 3. Washout Port

Quick Connect Lawn Mower Deck Wash Two Hose Attachment Clean Blades Replacement Connector

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The Kawasaki FS series engines have an integrated cleanout port absent in the Kawasaki FR series engines.

So, what value will you get for having this integrated cleanout port? Most garden experts recommend cleaning lawnmowers after each use to ensure the possible life expectancy and effective cleaning performance.

Cleaning a mower deck is easier and quicker with an integrated cleanout port. Hence, you are getting an extra benefit for using the Kawasaki FS series under this point.

4. 90 V-twin Overhead V-valve Vs. OHV V-valve Technology

The Kawasaki FR Series engines are mainly 90 V-twin engines. This type of engine covers less space, allowing other components to accommodate this extra space.

90 V-twin Overhead V-valve Vs. OHV V-valve Technology

On the other hand, the Kawasaki FS series include OHV V-valve technology, which has excellent benefit to supply air quickly and efficiently.

5. Pressurized Lubrication System

Both Kawasaki FR and FS engines have a pressurized lubrication system, meaning the oil is positively introduced into the bearings.

pressurized lubrication system

A pressure pump accurately distributes oil to significant areas of the pump by the pressure lubrication system.

Most garden experts said Splash lubrication does not perform as well as pressure lubrication. Therefore, you are getting the same benefit for using both series engines under this point.

6. High Pressure Die Cast Aluminum Block And Heads

The engines of the FS series are made with high pressure die casting production system to boost their production speed. In addition, the outer surface of this machine is heat resistant, making them stronger and sturdier.

High Pressure Die Cast Aluminum Block And Heads

Die casting ensures good dimensional stability while also maintaining tight tolerances. In addition, its aluminum block and heads make the engine lightweight. Hence, it gives you more flexibility and portability to cut grasses.

On the contrary, there is no such high-pressure die-cast aluminum block and heads used for engines of the FR series. Hence, the machines of the FS series stand in a higher position under this point.

7. High Energy Spark Ignition

The engines of the FR series feature a high-energy ignition system. This system is mainly intended for the forthright spark ignition of gas or oil igniters.

High Energy Spark Ignition

The main advantage of having high-energy spark ignition has minimal misfires. It is because this spark plug is designed to provide a constant, high voltage spark throughout the lifespan of the engine.

On the contrary, you will not get such a type of ignition system in the FS series. Therefore, the engines of the FR series are winners regarding this point.

8. Dual Element Air Filtering System

Dual Element Air Filtering System

The engines of the FS series come with dual element air filtering system. It means the engines have two kinds of filtering media. Air will pass through these two filters to ensure dust or dirt-free air for machines.

Though the engines of the FR series have a decent air filtering system, they are not as effective as the FS series. As a result, you may want to consider the FS series if you prefer a more effective air filtering system.

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9. Made For Different Purposes

The Kawasaki FR and FS engines are not made for the same purposes. If you desire to convert your lawn to look like a professional, the FS Series engines are a better option.

However, most gardeners will not need this as you will not mow your lawn or grass every day. This is a better choice for people or companies who provide Lawn Mowing Services.

The FS series has many extra features, which you will not find in the FR series. You will be able to do professional tasks more effectively and quickly with these series.

On the other hand, the Kawasaki FR series is best suitable for a household garden. They have solid components to make your grass cutting easy and hassle-free. Most household gardeners are satisfied with the model.

10. Price

Professional machines have obviously higher prices than residential machines. After all, professional engines can take care of heavy works for a long time. That’s why the Kawasaki FS series engines have a higher price than the FR series.

Let get an overview to learn the difference between Kawasaki FR and FS engines:

Kawasaki FR Engines Kawasaki FS Engines
4-Cycle Engine 4-cycle engine
Cast Iron Cylinder Liners Cast iron liners
No clean-out port Integrated clean out port
90 V-twin overhead V-valve OHV V-valve technology
Pressurised lubrication system Pressurised lubrication system
No High pressure die casting production system High pressure die casting production system
High-energy ignition system No high-energy ignition system
No dual-element air filtering system A dual-element air filtering system
Residential purposes Commercial purposes
Less  expensive More expensive

Which One Should You Choose Between Kawasaki FR And FS Engines?

Though both series have solid built-in quality, most gardeners preferred FS Engine Series as they are designed with professional quality.

The very first impressive thing of the FS Engine series is their effectiveness in doing most landscaping jobs. You will be happy to see their performance for any massive mowing jobs.

With its engine efficiency and impressive performance, you can mow your lawn all day long. You don’t have any reason to include fuel in the middle of the mowing task.

FS Engines are purposely crafted for landscaping mowing tasks, which you may not find even in many high-end competitive models.

Unlike old models of Kawasaki engines, Kawasaki has significantly reduced the overall weight of their machine weight. It is applicable for both Kawasaki FR and FS engines. As a result, for long-duration tasks, this ensures more efficient use of fuel and oil.

Both Kawasaki FR and FS engines come in a compact size, making them less weighty and implement a high amount of power. However, FS engines have better capability to handle massive landscaping jobs like many bulky mowers. They are so effective that performing the most challenging tasks seems easy for FS engines.

Both Kawasaki FR and FS engines are made from environmentally friendly materials to guarantee no harm to the environment and encourage a healthy and green environment.

Where Are Kawasaki Engines Made?

Kawasaki Engines factory outlook

Kawasaki Engines was first introduced in 1878 in Tokyo though their company is now fully controlled by an American company.

Where are Kawasaki engines made?

Kawasaki engines are mainly built and assembled in America. Their main factory is located in Maryville, MO, USA. However, many parts of their engines are made in China to reduce the production cost of machines.

Their production system is so sophisticated. They have robotics tools and teammates to build engines precisely and efficiently. Though most tasks are done by automation, human experts are still there to control the quality. They inspect and approve at every step to confirm the finest quality. These are not just regular engines, but Kawasaki Engines!

Are Briggs And Stratton Engines Reliable?

Briggs And Stratton’s Engines are primarily made in many factories in the USA. However, around 15% of engines are also built in other countries to reduce the overall cost. In addition, like many different brands, they also use globally made components to assemble their machines.

Are Briggs And Stratton engines reliable?

Briggs And Stratton’s engines have the decent quality to last many years as long as your take care of them appropriately. Their machines have sturdy built-in quality with user-friendly designs. Plus, they can last even 25-30 years with proper maintenance. You will find their spare components even for the outdated models.

The best thing about Briggs And Stratton Engines is their extended service life and hassle-free repair. Hence, if you are looking for consistent and reliable performance from a lawnmower, you can consider a high-end model from this brand. You will surely be satisfied with their simplicity, reliability, and excellent work-on service.

So, hopefully, you got the answer to this question: are Briggs And Stratton engines reliable?

Read More – Which Are The Best Lawn Mowers For Small Yards?

Which Engine Should I Choose for my Zero Turn Mower?

Not all mowers are built equally. So many options are available in the market; which engine should I choose for my zero-turn mower? Right?

Kawasaki FX, Briggs & Stratton Vanguard, TORO ZX, and KOHLER Command Pro are some high-end models that will never disappoint you.

However, our requirements and personal preference vary. That’s why you want to pick a model that seems most convenient for you finally. Let’s know some crucial points to find the best zero turn mower:

Zero Turn Mower Engine

When you want to have a reliable and consistent performance from a mower with fast speed, choose a mower that has a large engine size and more horsepower.

But before that, you want to decide whether you will use this mower for commercial or residential purposes. You don’t need excessive horsepower if you utilize it only for your individual goals.

If you have a large garden or managing a small lawn care business, Spartan RT HD or Kohler 7000 Professional Series. If you want a more powerful mower for your huge business, you can choose the Vanguard EFI/37 HP engine option.

How Much Fuel The Engine Can Hold?

For residential purposes, small-sized fuel capacity is okay. Most times, with 5-gallon fuels, they can cover their full gardens. Your machine will run smoothly while keeping the gasoline tired-free.

However, medium or large-sized fuel capacity is essential if you have huge yards or run a lawn care business. After all, you don’t want to fill up fuel repeatedly in the middle of the cutting grass. They will at least need 9-10 gallon fuels to cut grass without a break.

Zero Turn Mower Deck Size

Husqvarna MZ61 61 in. 27 HP Briggs & Stratton Hydrostatic Zero Turn Riding Mower

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When looking for the best engine for zero-turn mowers, deck size is a crucial factor you don’t want to miss out on.

On average, most mowers come with 48-72 inches deck sizes. However, you may discover several options among them.

But the query is, what is the ideal deck size for lawnmowers?

When you want more portability and flexibility, small-sized decks will be a better option. You can run on the machine smoothly even in a limited space or a small fence gate. On the other hand, a large deck size is convenient for extended coverage, especially commercial purposes.

Quick Adjustable Cutting Height

You may sometimes need to change the mower cutting height to deal with the craggy ground, unstable areas, or massive tree roots. The quicker you can adjust your mower cutting height, the more convenient it is to use.

Comfortability While Cutting Grass

The user experience for cutting grass with zero-turn mowers should be pleasurable and comfortable. In that case, how you feel while sitting on the seat, how much back support it provides, and how problem-free it is to control the mower.

You should check out their ergonomic design, quick response braking system, safe riding, and many additional features. In some cases, you may not be able to find a model with all the features you desire.

Are you still wondering about this query: which engine should I choose for my zero-turn mower? You just need to consider these essential factors to find the best machine for a zero-turn mower.

Read More – Which Are The Best Lawn Mowers For Small Yards?

Is the engine the most important part of selecting a good Zero Turn?

Many new gardeners often asked this question: is the engine the most important part of selecting a good zero turn?

A lawnmower cannot be operated without an engine. Nevertheless, it isn’t the only factor that matters. You want to check other essential components and functions to discover the best zero-turn mower.

For a good zero-turn mower, you should look at several other things.

Serial No. Important Factors
1 High-quality components
2 Well-made mowing deck
3 Strong mower frame
4 Manoeuvrability and stability
5 Effective cutting system
6 Balanced weight distribution

First of all, you want to ensure that all lawnmower parts are made from high-quality components for long-lasting durability. In addition, the deck should be strong enough to endure high impacts and rust and can take heavy loads for years.

Quality should be assured for the mower frame too so that it doesn’t distort or break easily. However, everything is not possible to measure by numbers.

For instance, how effectively the overall weight of the machine is distributed throughout the engine to ensure maximum traction, flexibility, and uneven areas stability?

Apart from that, how efficiently can your lawnmower cut most grass? Does it face difficulty to cut hard-type grass?

Premium-priced lawnmowers are made from high-quality components. However, many popular brands only focus on few parts of the machine instead of each part.

Though you are paying a high price and expecting the best quality for each part, you often may not get your desired results. Nevertheless, you indeed need to spend a great deal of money to purchase a decent lawnmower. But make sure all components are high-quality to get the best user experience.

Is the Kawasaki FS Series Engine Inferior to the FX?

Is the Kawasaki FS Series Engine Inferior to the FX?

Kawasaki is not a new brand in the mower market. They have been dominating the market for several decades. However, according to old users of mowers from this brand, their old models were far better than the recent models. They could easily use them for around 15-20 years without showing any sign of quality deterioration and engine problems.

Is the Kawasaki FS series engine inferior to the FX?

Both the Kawasaki FS series and FX series have high-end models. However, the Kawasaki FX series have an industrial air filtration setup, which gives a bonus point for buying a particular model from this series. For the Kawasaki FS series, you will have to clean out the filter regularly to prevent crawling up. This is the main benefit of these two series.

On the other hand, the Kawasaki FS series allows you to easily cut any small-size pine trees and other unelevated branches.

Didn’t I just see in another thread that you use turf tracers?? Don’t you like the Kawasaki engine on those mowers?

Though the company claims their machines can be run up to 5000 hours, their performance is not as exact as after running 1000 hours.

People are questioning their built-in quality though they are reputed brands. There is a common saying that low-quality components have been used to boost profit margins. That’s why some of them are nowadays buying other brand lawnmowers for running a ton of hours.

What Is The Best Engine For A Zero Turn Mower?

We have already mentioned above some essential points, which you should consider to find the best engine for a zero-turn mower.

What is the best engine for a zero-turn mower?

Kwasaki FS is the best engine for a zero-turn mower according to most of the experts. Choosing the best engine for a zero-turn mower requires some handwork and considerations. After all, you want to get the best value for the money.

How Much Price You Are Ready To Spend?

When you think of buying a zero-turn mower, you have most probably ready to spend approximately $5,000 or more. High-priced options mean you will get better quality and with extra features and functions.

However, as we have already noted, don’t blindly purchase a zero-turn mower just because it comes from a reputed brand. Instead, look for every nut and bolt to judge their quality and user-friendliness to make an informed purchasing decision.

How Much Motor Power Do You Need?

How much motor power you will need depends on which type of grass and mown you will cut.

Try to choose at least 20 horsepower motors for consistent and efficient cutting. Mowers with less than 20 horsepower will not help you cut grass and lawn evenly. Also, they will wear out or leave excessive spots on the blades.

Most people use zero-turn mowers for three purposes: residential, semi-professional, or commercial. Here we are mentioning through a table what should be the motor power for zero-turn mowers.

Purpose of use Motor Power
Residential Minimum 20 horsepower
Semi-professional Around 25 horsepower
Commercial 25-30 horsepower

Does The Zero Turn Mower Have A Hydrostatic Transmission?

During hydraulic tranny operation, fluid is used to allow gear shifts and power transmission. Even when you are cutting grasses in the most challenging conditions, Hydrostatic models can show reliable performance.

Plus, using them for extended periods doesn’t cause them to burn out. You will have the efficiency on the machine to make out the best performance from it.

How Weighty Is The Zero Turn Mower?

A zero-turn mower can be as heavy as 700-lbs. As the machine is pretty heavy, cleaning the cutting deck’s underside will require a jack.

However, you can clean the cutting deck of small-sized mowers from its side by turning them.

How Much Safe The Zero Turn Mower?

Every machine should have safety features, so does a zero-turn mower. Different model has different safety features such as kill switches, automatic chokes, and so forth.

Some models may have more than one safety feature. Don’t forget to check out this point, especially if you will buy a zero-turn mower for the first time.

How Good Are The Machine Tires?

Husqvarna MZ61 61 in. 27 HP Briggs & Stratton Hydrostatic Zero Turn Riding Mower

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Like go-kart models, most zero-turn mowers have air-filled tires. One of the critical jobs of tires is providing tractions.

Achieving precise cutting results is not possible, especially for wet grass, unless the tires have a lot of treads.

How Efficiently Can You Control The Mower?

No matter how good the mower is, you can’t achieve your desired result if you can’t control it properly.

Avoid choosing any zero-turn mower that is prone to operator fatigue. Instead, choose a model that allows you to control the machine comfortably with better grips and levers. Having levers with adjustable settings gives you extra benefits while saving your time too.

Now you have become knowledgeable enough about how to choose the best engine for a zero-turn mower. Allow us to recommend some top-notch quality zero-turn mowers from the market.

Model Special Features
Ariens 915223 IKON-X FR691 Series 52″ Zero-Turn Mower


 23 hp, 2.80 gal fuel capacity, Easy height adjustment.
Husqvarna MZ61 27 hp, 8.5 mph max speed, 5 gal fuel capacity.
Craftsman Z550 24 hp, 3.5 gal fuel capacity, 50 inches cutting width.
Ariens Zero-Turn Mower 24 hp, 5.10 gal fuel capacity, 8 mph max speed.
Husqvarna MZ61 Zero-Turn Mower 24 hp, 5 gal fuel capacity, 8 mph max speed.

Why Should You Choose Kawasaki Engines Over Kohler Engines?

Why Should You Choose Kawasaki Engines Over Kohler Engines?

No doubt, the Kohler brand already gained immense popularity in the market. But many garden experts still rank Kawasaki Engines one step ahead over Kohler engines due to consistent quality.

What’s more, Kohler engines are relatively heavy compared to Kawasaki Engines, making them less portable and flexible.

As Kohler engines don’t perform as consistently as Kawasaki Engines do, you will bear higher maintenance costs for using Kohler engines throughout its life span.

However, there is no way you can still overlook Kohler engines. If they are inferior, people won’t buy their engines. So, Kawasaki and Kohler are both excellent choices no matter the reason for replacing an engine.

Wrapping Up

So, we have come to our conclusion part. Are you still wondering about the differences between Kawasaki FR and FS engines? No, you are not!

We have already outlined all the essential details on both series. So which series seems preferable to you?

You just need to ask yourself why you need a mower, what mowing tasks you are going to do, and how big your garden is.

Depending on your preferences, select one of the appropriate series. Feel free to share with us which series you are going to buy and why.

Last update on 2021-09-29 / Affiliate links / Images from Amazon Product Advertising API