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How to Replace the Lawn Mower Drive Belt

If your lawn is too small to use a riding mower but too big to use a manual push mower, then your best choice is to use a self-propelled mower drive belt, which can help you in the yard walk around without having to push a heavy lawn mower.


When self-propelled lawn mower is working normally, lawn mower drive belt will bear the full weight of the lawn mower and a bag full of grass cuttings or leaves. All you need to do is follow it at a moderate pace.


The drive of these lawn mowers is really not very good. You can expect annual maintenance. Although there are no adjustable parts, the wheels are usually plastic, and the gears that drive them are steel, which means they won't last long.


A pair of drive wheels and transmissions cost you a lot of money to maintain and replace. Finally, you have the lawn mower drive belt to replace. They are basically standard automotive fan belts or accessory belts. They have a v shape and fit into pulleys that are mounted on the shaft that exits the engine just above the cutting blade and then run to the transmission just above the axle for the front wheels.


Replacing Your lawn mower drive belt


The first thing you need to do is remove the spark plug wire and tape the plug so that no sparks enter the combustion chamber, preventing accidents from happening.


The tools are pretty basic for this job you will need

Socket Wrench Set

Screwdriver and or Pry bar

Small brush


To change the mower drive belt of your lawn mower, you will most likely not need to remove the cutting blade or pulley.


The deck cover protecting the drive belt is removed starting with the lawn mower on four wheels. It should be secured with one or two bolts.


Now set the lawn mower aside so you can access the blade area and clean the cover and mounting bolts on the bottom belt cover.


Remove the bottom cover and remove all grass and debris from the bottom cover.


Check the conveyor belt and pay attention to how the conveyor belt matches the deck opening.


To remove the belt, you need to put the lawn mower back on the four wheels, and then press the drive wheel against the engine to give the belt enough slack so that the belt will fall off.


Compressing the drive springs enough to produce slack is difficult because as the springs get older, they harden. You will see that your replacement spring is easier to compress. Take your time and compress the spring. If you can't loosen it, you can cut the spring bolt and take off the belt.


The belt will slide out from under the lawn mower. Set the lawn mower aside and take off the belt. Pay attention to how you slide it onto the casing and blades to remove it because installing a new belt is the exact opposite. Once you take it off the drive wheel, you should not fight it to get it off.


Install a new conveyor belt and pass one end of the conveyor belt through the deck opening.


You now need to cut the gearbox mounting bolts if plastic and remove the old spring. If your mounting bolt is not plastic, you need to follow the manufacturer's instructions on how to remove it.


Before replacing the spring and mounting bolts, you are trying to install a new belt. If you install the seat belt first, you will never be able to adjust the spring bolt, it should be a locking bolt, which means you only have one chance.


Make sure the lawn mower drive belt is connected to the drive shaft pulley, and then turn one side of the belt around the outside of the drive wheel on the top of the mower.


Just like when you take off the belt, you need a compression spring to make the belt around the pulley. This takes some brute force, so be careful, maybe someone can help.


Once the new belt is on both pulleys, you can cover the underside of the lawn mower.


Keep the top cover closed and test your work, enabled by running the engine with power assistance.


Make sure the belt does not slip when the lever on your lawnmower handle is fully engaged.


You can now replace the top cover.


This is not a difficult job, but it does require some muscle belt pulleys.


It's also a slightly more dangerous job, tilting one side of it on your lawn mower. When working, the ends of the spark plug wires must be removed and protected from contact with the spark plug. Take this precaution seriously or bring your lawn mower to service. This is not a joke, nor is it a game. Take it seriously.


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