How to Make a Lawn Mower Go 50 MPH?

Making a lawn mower go 50 MPH is not a task for the faint of heart. To securely adapt a lawn mower for such high speeds requires a lot of expertise and ability.

In order to get a lawnmower up to 50 MPH speeds, it needs to be modified in a number of ways, including choosing the correct mower, upgrading your engine and transmission, and adding high-performance equipment, and taking necessary safety procedures, as doing so is not entirely risk-free.

This article shows how to make a lawn mower go 50 mph. This is an overview, not a full list of adjustments. Consult a professional before making major lawn mower modifications. Start!

How to Make a Lawn Mower Go 50 MPH

A Guide on How to Make a Lawn Mower Go 50 MPH

The guide will provide the necessary ways to modify a lawn mower to reach the desired speed of 50 MPH.

Choose the right Lawn Mower

The first step to making a lawn mower go faster is to choose the right model. Most standard lawn mowers are not designed to reach speeds of 50 MPH and do not have the necessary components to do so.

If you are looking to modify your lawn mower to reach higher speeds, you should choose a model with a larger engine and more powerful components.

An excellent example is Husqvarna 42 in. 18.5 HP Briggs & Stratton Hydrostatic Riding Mower has a powerful 18.5 hp Briggs and Stratton Intek engine. With a 16-inch turning radius, you can mow in smaller spaces and around obstacles.

Install Aftermarket Components

Once you have chosen the right lawn mower, the next step is to install aftermarket components. This is a complex process and should not be attempted without a professional mechanic.

  • The engine should be installed according to the manufacturer’s instructions.
  • The larger tires should be properly balanced and the fuel system adjusted to supply the necessary amount of fuel to the engine.
  • The exhaust system should be connected to the engine in accordance with the manufacturer’s instructions.
  • The clutch and gearbox should be installed and adjusted to the desired settings.

Tune the Engine

Tuning the engine can help increase the power of the mower and allow it to reach higher speeds.

However, it is important to note that this should only be done by a professional who is trained and experienced in engine tuning. If done incorrectly, it can lead to engine damage or even failure.

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Upgrade the Transmission


The transmission of a lawn mower is responsible for transferring power from the engine to the wheels. Upgrading the transmission can increase the speed of your mower.

There are a variety of aftermarket transmissions that are designed specifically for lawnmowers and can provide more power and speed.

Increase the Air Intake

Increasing the air intake will help the engine draw in more air and thus, generate more power. This can be done by installing a larger air filter or a cold air intake system.

Increase the Size of the Tires

By increasing the size of the tires, you can increase the traction of the lawn mower, which will help it accelerate faster.

Install a Performance Exhaust System

This will help the engine expel the hot air and exhaust gases more efficiently, allowing it to produce more power.

Install a High-Performance Spark Plug

 Spark Plug
Spark Plug

By installing high-performance spark plug the engine ignite the fuel more efficiently, allowing it to produce more power.

Install a Performance Chip

Performance chips are electronic devices that can be installed in the engine of the lawn mower. These chips can increase the power and speed of the mower by altering the engine’s fuel and timing settings.

Add a Turbo or Supercharger

Adding a turbo or supercharger to a lawn mower can greatly increase the power and speed of your mower. However, they are not cheap and can be difficult to install.

Choose a Safe Environment to Test the Speed

It is not recommended to test the speed of a modified lawn mower on public roads. A flat, open area such as a race track or abandoned airstrip is the best option. Make sure the area is free of obstacles and other vehicles.

Reach the desired speed. Once the safe environment is chosen, slowly accelerate the engine until it reaches the desired speed.

Make sure to pay attention to the engine’s performance and the surrounding environment. If the engine is running too hot or the area is not safe, slow down and stop the engine.

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Is It Safe to Make a Lawn Mower Go 50 MPH?

No, it is not safe to make a lawn mower go 50 MPH.

Lawn mowers are not designed or built to reach such speeds and the risk of serious injury or death is extremely high if the lawn mower were to be operated at such a speed.

The components of the lawn mower would not be able to withstand the forces of the speed, meaning there is a likely chance of it breaking apart.

Furthermore, the brakes, steering and other safety features are simply not designed for such speeds and will not be able to effectively stop the lawn mower if an accident were to occur.

In addition, the driver of the lawn mower will not be protected from the elements at such a high speed and could be seriously injured due to the lack of protection. Therefore, it is not safe to make a lawn mower go 50 MPH.

Frequently Asked Questions (FAQs)

How can I make my lawn mower go faster?

The most effective way to make your lawn mower go faster is to upgrade the engine with a higher-powered option. You should also check the air filter and spark plug to ensure that they are clean and working properly.

What are the potential risks of driving a lawn mower at high speeds?

The potential risks of driving a lawn mower at high speeds include loss of control, accidents, tipping over, and loss of visibility due to dust and debris. Additionally, there may be a risk of injury due to flying objects, and the mower could cause property damage.

Are there any safety precautions I should take when operating a lawn mower?

Yes, there are several safety precautions that should be taken when operating a lawn mower. These include wearing protective equipment, keeping children and pets away from the mower, and avoiding excessive speeds.


It’s challenging to make a lawn mower travel 50 MPH; it calls for major adjustments and safety measures. Before trying any modifications, make sure you research the parts and upgrades that are available for your mower.

With the right parts and a professional mechanic, it is possible to reach the desired speed. However, it is important to remember that it is illegal to drive a modified lawn mower on public roads.

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