Husqvarna Mower Drive Belt Problems and Its Solution

Since 1947, the Swedish company Husqvarna has offered great mowers. And the drive belt part is a crucial component of Husqvarna Mower. If it doesn’t function accordingly, you will face different problems with your mower. 

The belt can get worn, or the debris can interfere with the activity, or rust can reduce the lifespan of the belt. You may need to adjust the belt tension. 

So, in this article, I’ll discuss the common problems with a Husqvarna Mower drive belt and their solutions.

Husqvarna Mower Drive Belt Keeps Coming Off 

Whenever there is a problem with your belt, it generally keeps coming off. There are various reasons for that. Let’s discuss them one by one. 

Loose or Worn Husqvarna Belt

The belt will wear out with time by normal use. It can also become loose. If the belt is worn, cracked, or has a shiny glazed appearance, it’s time to replace it. 

Sometimes, you’ll have to adjust the belt properly. The adjustment procedure will be discussed in the latter part of this article.

Debris Interference 

Debris can build up in the deck around your pulleys and tensioner and interfere with the normal function of the belt. Actually, it hinders the pulley from moving properly, which eventually loosens the belt as it doesn’t get enough tension, and the belt vibrates. 

Debris build-up can even cause a fire hazard because of the heat of the belt. That’s why it’s important to keep your mower deck clean. 

Always remove the debris thoroughly and clean the belt with a clean cloth.

Oil And Rust Developed On Belt

If your Husqvarna mower faces oil leakage, oil can get onto the belt and cause it to stretch if the oil covers it for a long period. An oil-covered belt can slip on the pulleys and come off the deck.

Additionally, if the pulleys are old and rusty, it can cause your belt to dry out, making it prone to breaking. To get rid of this problem, you have to start from the root. 

First, you should repair the oil leak and then replace the rusty pulleys and the deck with a new clean belt.

Damaged Husqvarna Belt Keeper 

A belt keeper is basically a rod installed around your pulleys to secure the belt in place. These rods can get damaged if the slack in the belt hits them. 

It will result in the slipping of the belt off the deck. Bending the rods into place with vice grips and a hammer may help in this case. 

Other Damaged Parts

Some other damaged parts can also contribute to the belt’s coming off the deck. Drive pulleys and idler pulleys should be cleaned on a regular basis so that the movable arm can swing freely without obstruction. 

The same applies to the blade spindles. Keep in mind that the mower deck slants slightly forward, making it about 1/8 to ¼ inch lower in front than in back when adjusted properly. The belt can come off if the angle is too sharp.

How To Adjust Belt Tension On A Husqvarna Lawnmower

However, without any damage, the belt can stretch over time and slip off. That’s why it’s important to know how to adjust the tension of the belt. Let’s talk about it shortly.

1. Park the Lawn Mower 

Park the mower in an even and plane location and access to its underside. Use a lawnmower lift if possible. Don’t tilt the mower. Otherwise, the engine oil can come off.

2. Disconnect The Spark Plug

You may wonder why you should do this. It is for preventing the mower from the accidental start. The spark plug is placed on one side of the combustion chamber. Unplug them.

3. Turn The Log Lever 

Now you should look for the log lever. It should be at the control panel’s top area. On the end of it, there is a paddle handle. 

Rotate that log lever by holding the handle away from you to engage the blades. 

If it takes 2-3 seconds instead of 0.5 seconds to operate, the belt is loose. Pull the lever back to engage the blades.

4. Inspect The Blades

The blades should move if you did the 3rd step properly. Check if it worked. 

5, Loosen The Drive Belt

Now you have to do the opposite of the 3rd step. Push the lever away from the steering wheel. It will loosen the belt.

6. Check The Blades

Check the blades again. If you did the previous step properly, the blades should stop moving. 

Frequently Asked Questions (FAQs):

Why does my belt keep slipping off my lawnmower?

The Drive belt may slip from a riding mower pulley when it becomes loose. Also, the belt is made with rubber or other flexible materials. 
So, in continuous friction and heat, the rubber gets worn out, and the belt slips off from the lawnmower. Continuous stretch can also make your belt weak, and after some time, it slips off.

When should I replace my mower belt?

You may change your mower belt according to your need. You can change it after every two seasons or in each season. But sometimes, your mower can produce hectic performance in just a few days of changing the belt. 
In that case, you may change your belt immediately to avoid long-term problems with your mower’s components.

Does a lawnmower drive belt stretch?

Yes, a lawnmower belt stretches. Lawnmower blades spin at a high RPM, and that’s why the belt also spins so quickly. And mower belts are more sturdy than other vehicle’s belts. 
So, it cannot provide the same steadiness as car’s or other vehicle’s belts. It stretches easily after single burning, freezing, or spinning at a high rate. And that’s why you have to change your mower belt on a regular basis. 

Final Words 

The Husqvarna belt is an expensive part of the mower. So you should keep it usable as long as you can. Hence regular maintenance is important. Follow the advice given in the article to solve the Husqvarna mower drive belt problems. 

Always keep the mower clean and make sure oil or rust cannot form on your belt. Check the components of your mower regularly so that you can be aware of any problem in the early stage and solve it before it creates serious damage to the mower.

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