Why mower bogs down when blades engaged? 6 Effective Tips for you

When you see that mower bogs down when blades are engaged, some problems arise. This may annoy you. Especially, you do it for commercial purposes.

Mower bogs down may be a serious problem. Some reasons can lead to a bog-down mower. Therefore, it will take you more than a couple of minutes to deal with it. 

Not only does this article give you useful information to identify the problem. But also do show you some effective ways to prevent the problem.

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Reasons Why mowers bogs down when blades engaged

Reasons Why mowers bogs down when blades engaged

There are some common reasons for the mower bogs down even blades engaged:

  • Dirty moving parts or clogged filters may reduce cooling capabilities. The mower bogs down, although it is under load.
  • It’s out of capacity. The main cause comes from an uphill lawn and the wrong operation. Besides, the mower also bogs down if it is thick or high grass.
  • The low oil level can contribute to the problem. The carburetor will be overheating because of a lack of lubrication.
  • The spark doesn’t perform constantly. As a consequence, the lawnmower doesn’t have steady power. Let’s check the spark plug and improve the problem (or you should change the spark plug if it’s bad).
  • The blades are dirty or full of debris.
  • The muddler is clogged. It will make the motor seized.
  • The dirty carburetor can damage the seals or gaskets. 
  • You use bad-quality fuel.


How to keep mowers from bogging down

How to keep mowers from bogging down

To keep your mowers from bogging down, you should follow the simple steps below:

Step 1: Keep the grass short

If you don’t mow regularly, the height of the grass will not correspond with the height of the lawnmower deck. In this case, you should adjust the deck to a higher level. However, it still gives stress to the lawnmower. 

Fortunately, we have a solution with the high grass. The tip is never cutting too much grass at one time. Let’s shorten the length of the grass little by little. 

Related Post: How to measure lawn mower cutting height?

Step 2: Sharpen the blades

The dull blades can’t face the thick grass. Not only don’t you have a flat lawn, but also the lawn will attract more insert. It’s bad news that the lawn will be vulnerable to diseases.

The sharp blades cut the lawn perfectly. It’s enjoyable to see the clean edge that has no tears. After a few cutting days, the lawn will look like a big green blanket that you can’t find any brown edges.

The lawnmower mechanism recommends that you should sharpen a lawnmower’s blades after every 25 hours of use. It means that if you use it once a week, two hours for once, the blades should be sharpened after 12 weeks. This means that you needn’t sharpen them with tight timescales.

Step 3: Check the spindle

When the spindle rotates, it stimulates the performance of the pulleys and the belt. If they are in good condition, every part can move freely.

Sometimes, these parts can be clogged because of dirt and debris from the grass. In this case, the lawnmower can’t work as frequently. Moreover, if you don’t clean them, the parts can wear out. Lack of maintenance leads to a big expense for replacing parts.

There are some remedies for you. The first one is replacing the spindle. Besides, you can lubricate it. Let’s buy some lubricant liquid. Extract the spindle. Apply the lubricant liquid on all the surfaces of the spindle. Then install it in the proper place.

Further reading:

Step 4: Adjust or replace the belt

In many cases, adjusting the belt lightly can enhance the lawnmower’s performance. If the belt wears or has some crackings, you should change the drive belt

Every lawnmower has a belt tensioner. The self-tensioner helps maintain the constant pressure. Thanks to this, the belt won’t slip. However, the self-tensioner will be useless when the belt is too old. 

You run a lawnmower that has a slipping belt day by day. Your belt tensioner can crack as a consequence. In this case, you need to replace both the belt and the tensioner.

Step 5: Check the governor

In a frequent case, the governor works automatically. Thanks to this, the throttle stabilizes. If the workload increases dramatically, it will open the throttle. 

You can find the throttle between the throttle assembly and the computer control. Let’s open the housing to check the problem. If it has dirt, debris, or accumulated oil, you need to clean it. Then check all the springs. Check the throttle part by part. Confirm the damage to the throttle and the springs.

Checking the electronic governor’s senses is a professional task. In fact, you need special testing equipment to do this. If the failure comes from a broken sensor, you need the help of a repair service to deal with the problem.

Step 6: Confirm the airflow and the fuel flow

Airflow and fuel flow are two factors that directly affect the performance of a carburetor. Mower bogs down when blades engaged to come from some issues:

  • Clogged air filter: If the air filter is dirty or clogged, you still can start the engine. However, the amount of oxygen is less than the necessary one. This makes the lawnmower work hard, although you don’t have too much grass to cut. Recommendation: 2 Methods to clean paper air filter
  • Clogged fuel filter: Extract the filter to check the status. A clogged filter can’t provide the carburetor enough fuel to perform well.
  • The out-of-date gas: If the gasoline exists in the tank for about 30 days, it’s stale. You should replace it with the new gasoline (or drain gasoline from mower before storage). Moreover, cleaning the carburetor is needed.

For more details, you should watch this video:

Final thoughts

There are some reasons that the mower bogs down when blades are engaged. The problems will take time to check and repair. Therefore, having suitable maintenance is recommended. 

Our tips are the best ways to keep mowers from bogging down. Be confident, then go on with the steps. Everything will be alright.

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