Kawasaki FS vs FX – Comparing Power, Performance, and Reliability and More

Whether you’re a professional landscaper, a golf course superintendent, or a homeowner, choosing between the Kawasaki FS and FX engines can be a tough decision. Especially considering:

  • Engine performance,
  • Durability
  • Longevity,
  • Application versatility,
  • Power
  • Torque etc.

In this comparison article, we will explore the strengths and weaknesses of both the Kawasaki FS vs FX. So, buckle up and let’s dive into the world of Kawasaki engines, FS against the FX!

Kawasaki FS vs FX

At a Glance: the Strengths and Weaknesses of Kawasaki FS vs FX Engines

The following table contains comparisons on the strengths and weaknesses of the Kawasaki FS and FX engines:

CategoryKawasaki FS EngineKawasaki FX Engine
Engine PerformanceMaximum power output: 13.2 – 22.2 HP.Maximum power output: 13.2 – 31.4 HP.
Durability and LongevityRobust design with cast-iron cylinder liners and dual-stage canister air filter for enhanced durability.Durable construction with heavy-duty components cast iron cylinders and an advanced debris management system.
Application VersatilityCommercial mowers, utility vehicles, and generators.Commercial mowers, zero-turn mowers, and construction equipment.
Technology and InnovationV-valve, hemispherical combustion chamber, and digital fuel injection.Dual-stage canister air filter, integrated clean-out ports, and cast-iron cylinder liners.
Power and TorqueMaximum torque output is 31.0-40.0 lb-ft.Maximum torque output is 32.1-55.4 lb-ft.
Commercial vs. Heavy-DutyMore suitable for residential and light commercial use.Designed for commercial and heavy-duty use.
Advanced FeaturesElectronic spark ignition, internal timing belt, and electronic governor.Pressurized lubrication system, electronic fuel injection, and integrated clean out ports and most importantly.
Maintenance and ServiceabilityEasy maintenance.Easy maintenance.
Price and ValueGenerally lower priced compared to FX engines.Generally higher priced due to increased power and features.

A Detailed Comparison Between Kawasaki FS vs FX

It is popularly known that the only difference between the two engines is the air filtration system. However, here’s a detailed comparison between Kawasaki FS and FX engines:

1. Does Kawasaki FS Have a More Powerful Engine Performance?

Yes! It certainly has more range of engines with higher HP.

The Kawasaki FS has a range of power options ranging from 13.2 – 31.4 horsepower. It has excellent torque characteristics. It offers high performance with increased power density.

The Kawasaki FX engine provides a power option 13.2 – 22.2 horsepower for heavy-duty applications. It also delivers high performance with improved combustion efficiency and an advanced cooling system.

Both the FS and FX engines are known for their reliable performance and smooth operation. However, the FX engine’s advanced cooling system and wider power range may offer better performance where higher horsepower is required.

2. Which Kawasaki Engine Lasts Longer Between FS and FX Engines?

Both the FS and FX engines are built with a robust design. Both the engines feature cast-iron cylinder liners.

However, the FX engine is designed with durability in mind. It has heavy-duty components and an advanced debris management system. This gives added protection against wear and tear, making it potentially more durable in demanding applications.

Moreover, the FS engine gives up at around 1500 hours. Whereas a FX engine runs for about 3500 hours.

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3. Is the Kawasaki FX more versatile than the Kawasaki FS?

The FS engine is versatile and can be used in a wide range of applications. This includes commercial mowers, utility vehicles, and generators. It is said that the FS replaced the FH engines by Kawasaki (used for commercial-grade applications)

The FX engine is specifically designed for demanding applications that require maximum performance and durability. Therefore, more reliable brands use these engines in their machines. These are:

  • Kawasaki
  • Toro
  • Scag
  • Kubota etc.

The FX wins the round on being more versatile.

4. Power and Torque Comparisons of Kawasaki FS vs FX.

In general, Kawasaki FX engines have more power and torque than Kawasaki FS engines.

This means that the FX engines are suitable for demanding applications requiring increased performance and productivity. The highest torque offered is 55.4 lb-ft. on the FX1000V-DFI.

The FS engines are appropriate for lighter-duty applications that do not require as much power. The highest torque offered is 40.0 lb-ft. on the FS730V.

5. Price Comparisons of Kawasaki FS and FX

Compared to the FX engine, the FS engine is generally more affordable. The exact price varies depending on the model, horsepower, and additional features. But in general, the FS engine is less expensive.

As of the September 2021 knowledge cutoff date, the price range for Kawasaki FS engines can generally fall within the following approximate ranges:

  • Models with lower HP range: $400 to $800 (approx.)
  • Mid-range (mid-HP) models: $800 to $1,500 (approx.)
  • High-end models (with higher HP): $1,500 to $3,000 (approx.) or more.

Due to its higher horsepower range and sophisticated features, the FX engine is priced higher than the FS engine. It is positioned as a premium engine with top-tier durability and performance.

The price range for Kawasaki FX engines typically starts from around $1,200 to $3,500 or more. It depends on the horsepower and other specifications.

6. Resale Value Comparisons of Kawasaki FS and FX

If the engine is in good condition, it will sell well. If it is not, it won’t.

But it is common sense that the Kawasaki FX engine will have a better resale value due to its higher demand, and higher buying price as well.

Moreover, the FX does not give up as easily as the FS. So, it will have a better chance of being in a good condition.

Kawasaki FS vs FX Engines – Which One Should You Choose, Finally?

After this entire decision, it is logical that you choose the Kawasaki FX over the FS engine. To sum up, here are the reasons why:

  • It has higher power outputs than the FS series engines
  • It is most useful for applications that require more horsepower.
  • The engines are typically designed to comply with stricter emissions regulations.
  • These engines may be used in construction equipment or other heavy-duty applications as well as home mowing.

Although the FS engines may be more fuel efficient, but the FX engines are overall better.

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Best Combination of Kawasaki FS and FX Engines with Respective Mowers

We have seen a frequent combination of FS or FX engines with a specific mower. Either it comes from the factory or users deliberately pick these combinations.

Some of these combinations are discussed below. This can help you pick the tried and tested combination of a mower and Kawasaki FS/FX engine for your lawn.

  • Scag Turf Tiger II Zero-Turn Mower with Kawasaki FX1000V engine: The Scag Turf Tiger II is a commercial-grade zero-turn mower. It is known for its durability and performance. Pairing it with the Kawasaki FX1000V engine (35 HP V-twin engine) makes it superior.
  • Ferris ISX 800 Zero-Turn Mower with Kawasaki FS730V engine: The Ferris ISX 800 is a zero-turn mower designed for professional use. The Kawasaki FS730V engine is a 24 HP V-twin engine from the FS series. Together, they give an outstanding mowing experience.
  • Exmark Lazer Z X-Series Zero-Turn Mower with Kawasaki FX850V engine: Being a commercial-grade zero-turn mower known for its productivity and cut quality, of course the mower is paired with a Kawasaki FX850V engine. This is a 27 HP V-twin engine from the FX series, known for its performance and durability.
  • Hustler Super Z HyperDrive Zero-Turn Mower with Kawasaki FX730V engine:

It is a premium zero-turn mower with advanced features and performance. It is commonly equipped with the Kawasaki FX730V engine, a 23.5 HP V-twin engine from the FX series.

Kawasaki FS vs FX – FAQs

Can I upgrade from Kawasaki FS to FX engine?

Yes, depending on the specific equipment and compatibility, it is possible to upgrade from a Kawasaki FS engine to an FX engine.

What is the warranty coverage for Kawasaki FS and FX engines?

Kawasaki offers a limited warranty for their FS and FX engines

Where are Kawasaki FS engines made?

They are made in the Maryville, Missouri plant in the United States.

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