How To Make A Lawn Mower Go 30 Mph (Or Even 40-50 Mph)

Last Updated on February 21, 2023 by Mattias

A riding mower has mostly a maximum speed of 4mph and isn’t made for high speeds. Changing the speed of your lawn mower isn’t recommended. The componentry isn’t made for increasing the speed of your mower to 30mph.

If you read this ultimate guide about “how to make a lawn mower go 30 mph” and decide to follow all steps, you must understand that the most important thing is to look over the frame, the front axle, brakes, front ends, and bearings.

Many homeowners are turning their normally riding mowers into racing mowers, so it’s fully possible. Still, since your lawn tractor was made for a much lower speed, you must complete the necessary changes to handle a speed of 30 mph.

It’s also important to remember that the warranty won’t occur when doing significant modifications. Some of these tips are simple additions and can be done without hurting the warranty.

With that said, let’s see how much speed we can add to your mower!

How To Make A Lawn Mower Go 30 Mph – Simple Additions

By following this handy guide, you can easily change your lawn mower’s speed and, hopefully, get a full speed of 30 Mph. We will start going through the simple additions you can make.

Change The Oil

Sometimes an oil change is enough for an increased speed. Using a higher-quality oil can make a huge difference, especially if you have a cheap oil that is most likely low-quality. All owner’s manuals should have notes of which kind of oil you need. Suppose you can’t find it. Contact the manufacturer or the place you bought your lawn mower.

Note: It’s also important to change the oil regularly.

Install Larger Wheels

Small wheels tend to make your mower go slower. By using larger tires on your lawnmower, you can indirectly change the speed of your mower. The tire change can also make it easier for you cut larger grass. However, getting huge wheels is not a good idea since they can cause mower tongue.

Look Over The Spark Plug

The spark plug is responsible for ignition. If that isn’t working as it should and are defective, it can cause your engine to perform badly. If you have noticed lately that your mower’s working speed isn’t so good, this is what you want to take a look at. Look over the spark plugs and change them if they are damaged.

Check The Lawnmowers Battery

A low battery can make the best riding lawn mowers slow, especially for those with an electric mower. In that case, you must charge it.

Tip: Always look over your battery when doing routine maintenance.

Look Over The Lawn Mower’s Air Filter

A dirty air filter can make your lower go slower. If there’s dust, debris, and too much dirt stuck in the filter, it can clog, hence making your lawn mower go slower. You can either do an air filter cleaning yourself or change the filter. If it’s in too bad condition, you may need to replace your machine’s air filter with a brand-new one.

How To Make A Lawn Mower Go 30 Mph – Major Modifications

Now it’s time for the major modifications that can turn your family lawn mower into a race mower.

Install a Bigger Pulley and Belts

Installing a bigger engine pulley and belts is one of the most effective ways to make a lawn mower go 30 Mph. These parts of your mower work together, so changing the pulleys and looking over the belt systems simultaneously can be a good idea.

Note: Some mowers have two pulleys. In that case, both must be changed if any changes in size are made.

Change The Motor

If you can afford it, changing the motor would be the first thing to do. It’s no surprise that a larger engine can help your mower reach higher speeds, but it’s also the most expensive change. At least if you must buy a new motor for it.

Tip: Look after a working motor in a scrapyard.

Change The Size Of The Governor Spring

The governor‘s job is to regulate the flow of oil that goes into the mower’s engine. This affects the power hence your mower’s speed. But it also prevents the engine from using too much fuel, which is done by a small spring connected to the governor. By removing the spring, you can increase the speed significantly.

How To Make A Lawn Mower Go 30 Mph Summary

There you have it, the ultimate guide to making your lawn mower go 30 Mph or even more. As we stated in the beginning, it’s very important to make the frame and all other parts “stronger” since the lawn mower isn’t made for high speeds. It’s also recommended to use some safety gear in case you flip over.

Also, remember that making the lawnmower go 30 mph or more is not recommended, as it may pose safety risks and can damage the machine

Good luck, and stay safe!