Though lawnmower keeps running till you shut it off on your own. But with time, it is common for any electrical machine, including lawnmowers to behave abnormally; it may suffer from cold wear issues, engine issues. So as Husqvarna mower dies when blades engaged, most of the other lawnmowers do the same.
Most of the people using Husqvarna mowers experience this unusual situation that when they engage the blades, their engine dies, it stops working, and it gets disconnected.
Engine dying issue during blades engagement is not a natural kind of problem and is not with every Husqvarna user. The lawnmower has some unusual reasons behind this condition.
In this article, we are going to extract out all the reasons for stalling and dying of the engine. We will help you with the possible solutions and methods to maintain your lawnmower by avoiding this issue.
Table of Contents
5 Reasons Why Husqvarna Mower Dies When Blades Engaged
There can be many reasons behind the engine dying during blade engagement. Let’s have a detailed look at these causes and have a comprehensive look at their best possible solutions entirely to overcome and avoid them in the future.
The reasons can be:
1. Restricted carburetor
A carburetor is a device that mixes air and fuel in the proper air-fuel ratio for internal combustion in the engine.
The residue of old fuel left in the tank can create a restriction in the carburetor. And this restriction can affect the engine in several ways. It will have an adverse effect on:
- Engine Startup.
- Fuel economy.
- Exhaust emission.
How to maintain restricted carburetor
The old residue can clog the carburetor and will make it difficult for the engine to work efficiently. To make the engine efficient with better fuel economy, the carburetor needs to be appropriately maintained.
That is why you always advised to:
- Use fresh fuel while filling the tank.
- Make sure to use a fuel stabilizer to help in maintaining the quality of the fuel.
- Clean the carburetor with carburetor cleaner to eliminate the clog.
- If cleaning is not effective, then use a carburetor repair kit to replace the defective components of the engine and carburetor.
- If not, then install a new carburetor to fix it.
2. Clogged fuel cap
As fuel is consumed, the level of the fuel in fuel tank lowers. to make up for fuel caps have small vent holes to allow air in the fuel tank. It can be the cause of stop that your fuel tank is not venting properly.
If the vent holes have a blockage due to the debris, dirt, or fuel residue, then the air would not be entered in the tank. And it will cause a vacuum in the fuel tank, which makes the engine stop.
Moreover, clogging of the cap will stop the proper flow of fuel coming towards the engine or will make the flow that much slower, which will not be enough to start the engine.
How to fix clogged or vented fuel cap
So, when you noticed that you have a lousy vent in the fuel cap and your tank is not vented properly, and it will let you think that your lawnmower is running out of fuel.
You can fix it with a simple, easy, and cheap way by:
- Replace the fuel tank cap.
3. Defective spark plug
A spark plug is a current delivering device that controls the flow of electric current from an ignition system to the combustion chamber engine to ignite the compressed fuel and air mixture by an electric spark by keeping the combustion pressure within the engine.
Due to carbon build-up and a weakened electrode, the spark plug would degrade over time, and cause the engine to stop. If the insulator is damaged, then it causes the electrode to burn, and it stops the engine.
The defective spark plug directly affects:
- The fuel economy.
- The head start of the engine.
- The engine performance.
- The engine surging rate.
How to replace a defective spark plug
You should inspect the spark plug for damage and wear. You can also use an ignition tester to check that if the spark plug is defective.
The only and easy way to fix the spark plug related issue is:
- Replace the defective spark plug with a new one.
Steps to replace a defective spark plug
You can follow the following simple steps to replace the broken piece;
- Search the plug by removing other parts of the lawnmower.
- Mark the location and remove the damaged ignition coil of the plug.
- Blow out spark plug channels from debris by using compressed air.
- Remove the old, damaged, or defective spark plug by using a spark plug socket.
- Clean the spark plug threads because they play a significant role in preventing future seizing.
- Lubricate the new spark plug, set the gaps, and install the new spark plug.
- Check the engine and lawnmower by starting it.
4. Poorly Routed Drive Belt
A drive belt is a part to drive most of the engine parts including major parts of the mower such as a power steering pump, water pump, air conditioning compressor, air pump, etc. The belt itself is driven and guided by a pulley and a belt tensioner installed on the engine crankshaft.
A poorly routed belt along with the stuck pulley that doesn’t spin freely can cause the engine to die during blade engagement.
Steps to fix or replace a broken or poorly routed belt
By following these steps, you can make your lawnmower capable of avoiding all engine issues related to the drive belt:
- Make sure to turn the mower off and cool down the engine.
- Unbolt the drive belt according to the instructions given in the user manual by using belt repairing tools.
- Remove the old belt carefully from the pulleys.
- Make sure that pulleys are capable of spinning freely.
- Measure the length and use the drive belt according to the reliable and suitable size.
- Re-install the new belt the way you uninstall the old one by referring to the user manual.
- Tight the belt as required by compressing the tensioner.
- Make sure to check the belt tension by pulling the belt, so that it can not be able to stretch more than one inch.
- Check the belt tension by starting your lawnmower and by ensuring that the drive belt is routed correctly straight onto the pulleys.
5. Idler or Faulty Pulleys
The main function of pulleys is to ensure the smooth spinning or properly routed drive belt. The drive belt and the spindles drive the pulleys in the lawnmower.
If a pulley doesn’t spin freely, it can affect and cause the engine to die throughout blade engagement. Moreover, a faulty pulley can cause severe damage to the belt and also change the working functions of the components.
Steps to replace the idler or faulty pulley
- Remove the drive belt from the engine and lift the deck lever for blade engagement.
- Lifting the deck lever will release the blade brakes, and it allows the spindles to spin free or by hand.
- Now spin the idler pulleys on the mower deck and check for a growling noise. Noisy pulley needs replacement.
- Use a proper-sized wrench to unbolt the pulleys after removing the deck blades.
- Remove the nut, cup washer, pulley, and belt guard. Cleans them properly and replace them if needed.
- Re-install all the parts in the same way they opened.
- Check these re-installed new components by starting the engine.
We hope that with the explained reasons along with their helpful solutions and fixing tricks, it is now easy for you to maintain your engine thoroughly.
Moreover, it helps you in providing you with a durable, long-running lawnmower.
Thus, by tracking the reasons for stalling and dying of the engine during blade engagement, you will now tackle your issue and will solve it by your hands without wasting your savings on the lawnmower maintenance.