Why My Mower Loses Power When PTO Engaged: What to Do? 

The PTO (power take-off) is a mechanism that transfers power from the engine to the cutting deck. 

If your mower loses power when PTO engaged, it’s a sign that there’s a problem with the engine or transmission. Sometimes a dirty air filter and a clogged fuel filter can also cause this problem.

Read this article to know what are the reasons that are causing the problem and how you can fix them. 

Mower Loses Power When PTO Engaged

5 Reasons Why Mower Loses Power when PTO Engaged and Their Fixes

When you engage the PTO, the engine needs to work harder to drive the cutting blades. If the engine isn’t able to produce enough power, it will start to lose power. Let’s learn what causes the situation and what are the solutions.

1. Mechanical Obstructions:  

One common reason for a mower losing power when the PTO is engaged is the presence of mechanical obstructions. It can be accumulated debris, dirt, or grass clippings that disturb the connection between the engine and the PTO.

The PTO and the engine are connected with a belt. This is known as the PTO belt. Over time the belt gets loosened and worn which can create this problem too. 

The PTO is attached and assembled underneath the mower deck. There it is directly connected to the blades. If the dick is not clean and it has debris and grass clippings, that can also make a faulty connection.

To fix these issues, you have to thoroughly check the PTO assembly. Look for any visible damage and physical obstructions. 

Make sure the belt is fine and it is clean. If you see any damage, consider changing the belt. 

And always make sure the mower deck is clean. Right after you are done with mowing clean underneath the deck with a scoop. 

2. Electrical Problems: 

Another potential cause of power loss when the PTO is engaged is electrical problems. Faulty wiring or connections can disrupt the power flow, affecting the performance of the PTO.

Check if the PTO switch is properly working. If you use the mower for a long time, the switch can get rusty and it can easily get damaged. If you find any issue with the switch you better replace it.

A weak or faulty battery can lead to a mower loses power when PTO engaged. Check the battery’s voltage using a multimeter and ensure that it is within the manufacturer’s recommended range. 

If the voltage is low, recharge or replace the battery. Additionally, inspect the charging system, including the alternator and voltage regulator, to ensure they are functioning correctly.

Check the wiring harness too. Look for frayed and exposed wire. If you see one replace the wire or tape it.

3. Engine and the Drive system: 

This is the thing you should check at the last. If there is any problem with the engine, it is possible your mower loses power when PTO engaged. 

It can be a clogged or dirty fuel or air filter that restrict airflow and fuel flow to the engine. It reduces power output and makes the engine lose power.

Inspect the filters and clean or replace them if necessary. Regularly replacing these filters can prevent power loss and ensure optimal engine performance.

A dulled spark plug can make it harder for the engine to ignite the fuel, which can lead to a loss of power. So, make sure your spark plug is perfectly fine and working properly.

If none of the above steps resolve the power loss issue, it’s essential to evaluate the engine’s performance. Check for any signs of engine problems, such as unusual noises, excessive smoke, or poor throttle response. 

If you notice any such issues, consult a qualified technician to diagnose and repair the engine.

Frequently Asked Questions (FAQs):

Why does my mower die when I engage the PTO?

There can be many reasons for this problem. But a weak battery and worn-out PTO belt are the most common reasons. Make sure your engine and all other components are working properly. 

Will a bad PTO clutch cause power loss?

Yes a bad PTO can make your mower lose power. There are some symptoms you can notice if your mower PTO clutch has gone bad. The common symptoms are unusual noises, delayed engagement, loss of power, high engine revs, etc.

Why is my lawn mower suddenly losing power?

There are many reasons why your mower can lose power. A dirty air filter on your mower and a bad spark plug are the most common reasons. 

Should you engage PTO at full throttle?

The best speed to engage the PTO clutch is always to keep the lowest possible speed you can do. But it depends on the manufacturer some say you should engage PTO at full throttle. So read the user manual to be sure how you should do it.

Similar Posts

Leave a Reply

Your email address will not be published. Required fields are marked *