How to Stop Lawn Mower Shooting Rocks


Lawnmower shooting rocks is when your lawnmower shoots or ejects small stones, dirt clumps, and other types of debris. This happens because small things are getting kicked up by the blades of grass coming in contact with the lawnmower blade. The problem is very annoying and dangerous as it can cause severe damage to you if a flying object hits you.

Not to mention that it’s just messy to have all these tiny objects being ejected from your lawnmower onto your freshly cut grass. However, there are several ways to go about solving this problem. In this article, I will discuss how to stop lawn mower shooting rocks. So let us get started.

How to Stop Lawn Mower Shooting Rocks

Why Does a Lawn Mower Shoot Rocks?

The primary cause of lawn mower rocks is excessive wear to the front and back wheels for most people. As the wheel wears down, it creates a void in which small pebbles can become lodged.

Then, with every revolution of the wheel, that rock jabs into your lawn and shoots out behind you – usually resulting in a puncture or tear somewhere on your body. Wear can happen with natural use, abuse, or a combination of the two. Generally speaking, the harder you push your mower,

the less often you service it will lead to accelerated wear on critical components. And so this is why many people experience rocks being shot from a lawnmower for a variety of reasons.

However, if you have experienced stones being discharged from your old lawnmower, take heart because there are steps that you can take to fix your lawnmower and prevent rocks from flying out at random points during mowing.

Stepwise Guide on How to Stop Lawn Mower Shooting Rocks:

Stepwise Guide on How to Stop Lawn Mower Shooting Rocks

1) To start with, turn off your lawnmower.  This step is crucial because the engine will prevent some rocks from being thrown out of the side. If you have a riding lawn mower, be sure to pull into the highest gear possible while stationary to prevent excess rock movement. Do not operate at full throttle while turning on or off.

2) Next, remove all loose material from under your deck. This can be done by removing any debris that collects in front of the blade(s), rear deflector shield (push mowers only), or underneath your deck is equipped with an underside collection bagger system for catching grass clippings before they hit the ground.

3) Inspecting under your deck is one of the most critical steps to take into account when learning how to stop lawnmowers from shooting rocks. Often, your deck will become caked with material such as dirt and small stones (more on this here). Sometimes, these materials can cause excess ricochets if not rim;

however, removing these items is also a good idea because they can damage your mower’s blades. You may even consider installing metal skid plates underneath your deck to reduce wear on the underside and reduce flying rocks and debris by preventing them from striking your blades.

4) Ensuring that all fasteners are tight before operating your machine is another crucial step in stopping rocks from being shot out of it. This includes any bolts that attach the blade(s) or gearbox to the engine.

Again, this is important for preventing any rocks from making their way into your mower’s engine through openings between components, putting unnecessary strain on internal parts, and causing damage or premature failure.

5) The final step in learning how to stop lawnmowers from shooting rocks is allowing the blade(s) sufficient time to completely stop if you should need to come to a halt quickly after using your machine.

This includes applying the brake if you have one but may also include slowing down if your deck does not slow automatically when engaged. You should follow these same procedures to properly shut off all machines that do not run under critical ignition systems while moving away from them.

Precautions While Repairing a Lawn Mower From Shooting Rocks:

Precautions While Repairing a Lawn Mower From Shooting Rocks

Lawnmower shooting rocks is a problem that usually results from worn-out drive belts for blades. If a lawnmower shoots rocks, first check the drive belt for worn-out parts.

If you plan to replace this part yourself, be sure to remember to unplug your electric power cord before beginning repairs on your machine. Be sure also to have your shop manual handy, so you can identify all of the components and arrange them in their proper location as they are removed from the machine. This will ensure more accurate reinstallation, thus giving you that smooth feeling lawn that has been free of rocks for some time now.

Be sure not to remove any screws more than once, or else chances are excellent that you’ll lose them. Remember, it’s always important to be sure you have a clean workspace so you can keep track of your parts.

How To Clean a Lawn Mower?

How To Clean a Lawn Mower

1. Unplug the mower from the wall socket before you begin to clean it. Never service a mower while it is plugged in or near standing water. Doing so can result in electrocution or death, as well as damage to your machine. Additionally, you risk damaging the electronics within your mower if there is electricity present when you are trying to clean it, which could prolong the life of your machine and save money over time.

2. Remove any clippings, rocks, or debris that may be stuck inside of an exposed belt pulley by flipping your lawnmower on its side and removing them with a flathead screwdriver or other sturdy utensil that fits into crevices easily (this should only be done on a mower that runs with belts). Be sure to remove as much debris as you can, as some rocks or clippings may not be visible.

3. Remove the spark plug wire from your lawnmower and use contact cleaner spray around the area where it attaches to the engine block (but make sure not to spray inside the wire casing! You don’t want any electrical mishaps!) and let dry completely. Using a broken-down pencil eraser about one inch in diameter, clean around each tread within your tire treads.

4. Fill up your gas tank until it is complete, run your lawnmower for about 3 minutes at half speed to distribute gasoline throughout all parts of your machine, then turn off your mower and let it sit for another 3-5 minutes. Be sure to observe the fuel-air mixture on your engine by doing this, as you want to make sure that no soot or any other deposits are spilling out of the exhaust.

5. Begin cleaning your lawnmower with a hose, making sure not to spray water directly at any exposed belts or pulleys within the machine (this can warp the metal parts inside of them). Instead, use a brush or sponge that fits easily into crevices to clean all dirt and debris out of every aspect of your lawn mower’s inner workings.

6. After brushing off excess grime from your lawn mower, use a leaf blower on the outside of the mower to get rid of any loose dirt, leaves, or grass clippings.

7. Spray a layer of WD-40 on all parts that move, such as pulleys and hinges, to prevent rust from occurring within your machine while it is stored indoors during the winter months. If you live in a coastal area that has high humidity levels, spray a second coat on these parts after a few days have passed.

8. Wipe down the entire exterior surface of your lawnmower with an old rag to remove dust and other small particles that may be lingering around it before you store it for the season (or whenever you intend to put it away).


I hope you have obtained all the necessary information for how to stop lawn mower shooting rocks from this article. Thank you and have a nice day!

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