5 Reason Why Husqvarna Mower Dies When Blades Engaged [Fixed]

husqvarna mower dies when blades engaged

The most common issue with Husqvarna mowers is that they wear out over time and most of the time Husqvarna mower dies when blades engaged. They may suffer from cold-wear issues or engine problems which cause them to die but other models do the same thing often!

The blade stop problem has been an issue for many homeowners who use Husqvarna mowers. When they engage the blades, their engine dies and it gets disconnected from the power source or even stops working altogether!

Husqvarna is aware that some users may face an issue with their engine during blade engagement. The lawnmower has been reported to have unusual reasons behind this condition, but they are working on finding out more information about it so everyone can enjoy using these great tools without worry! So are we!

In this article, we are going to extract 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.

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.

Reason Why Husqvarna Mower Dies When Blades EngagedFixes
Restricted CarburetorClean the Carburetor, Use a Fuel Stabilizer, Buy a New Carburetor
Clogged Fuel CapReplace the Fuel Cap
Defective Spark PlugInspect Properly and Replace the Spark Plug
Poorly-Routed or Broken Drive BeltRe-route or Replace the Drive Belt
Idler or Faulty PulleysReplace the Faulty Pulleys
Engine’s Running on Bad Gas (Minor Issue)Drain Stale Gas, Put in Fresh Gas
Open Grass Box (Minor Issue)Remove Anything that Could be Jamming the Box
Misalignment of the Grass Box (Minor Issue)Straighten the Support Arms

Major Reasons Why Husqvarna Mower Dies

The major reasons can be:

1. Restricted Carburetor

Carburetors are devices that mix air and fuel in the proper ratio for combustion within an engine. The residue of old gas left behind can create a restriction, which will affect how your mower runs- it could make things slow down or stop altogether!

It will have an adverse effect on:

  • Engine Startup.
  • Fuel economy.
  • Exhaust emission.
  • RPM

How to Maintain Restricted Carburetor:

Carburetor maintenance is important for ensuring that your engine operates at its peak efficiency and provides you with better fuel economy. But the old residue can clog up the carburetor plus engine.

That is why you are 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.
Engine Gasket
• Genuine Husqvarna Engine Gasket Kit
• Compatible with Husqvarna, Poulan, and Craftsman
Nylon Bristel Brush Set
Made of brass, stainless steel, and nylon
Strong and Durable
Rust Resistant
Suitable for cleaning and removing Dust, Rust, and loose paint
Carburator Cleaning Solvent
Helps overcome hard starting, stalling, and exhaust emissions
Quickly removes deposits inside and out
Improve engine performance and fuel economy
Effectively cleans unpainted metal parts
Fuel Filter
• 1/4″ gas inline fuel filter
• High-Quality Magnetic Fuel Filter
• Compatible with John Deere, Kawasaki, Kohler, Briggs and Stratton engines
Carburator Cleaning Kit
4 types of cleaning needles, nylon brushes, and cleaning wires
Perfect for clearing out blockages or obstructions
Spiral bristles with rust-proof, non-deforming, and good elasticity material
Perfectly removes Carbon Dirt Deposit from carburetor and Engine

2. Clogged Fuel Cap

To make up for a lowering in fuel levels, lawnmowers have vents that allow air into their tanks. The problem can be when these holes aren’t working properly and cause an issue with the venting process of your vehicle’s tank – leading to lessening performance or even stopping altogether!

If there is a blockage in the vent holes that causes debris, dirt, or fuel residue to accumulate then air will not enter your tank. This can cause a vacuum on top of an already empty engine causing it to stop running!

Moreover, Fuel can also gum up the works if it gets too thick, which will stop fuel from flowing towards your engine. This means that you’ll have to clean out any clogged parts regularly or risk having a hard time starting them in cold weather when they’re most needed!

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 in a simple, easy, and cheap way by:

  • Replace the fuel tank cap.

3. Defective Spark Plug

The spark plug is one of the most important components in an engine because it controls electric current and determines when sparks will be produced. If there isn’t enough power, then this device won’t work properly which can lead to poor gas mileage or even no compression at all!

The Spark Plug is a key component in your engine that ensures spark, or voltage from one electrode to another. Over time this can build up carbon deposits on it which will eventually cause damage and lead stop the bike dead! If you’re having issues with starting then check our guide for some common fixes. 

The defective spark plug directly affects:

  • The fuel economy.
  • The head start of the engine.
  • The engine performance.
  • The engine surging rate.

Replacing a Defective Spark Plug:

You should inspect the spark plug for damage and wear. You can also use an ignition tester to check 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.
Lawn mower spark plug
Original Equipment Manufacturer (OEM) part
Compatible Brands: Craftsman, Tecumseh, Mtd, Sears, Troybilt
Air Filter
• Kawasaki OEM Air Filter
• Compatible with Cub Cadet, Toro, John Deere, Gravely, BobCat, Husqvarna, Exmark, Stens, Ariens riding / push lawn mower
• protect the filter from the dusty environment 
• extend working life.
Spark Plug Tester
Gives a Visual Check of the Ignition System
Quickly diagnose problems in the entire ignition system
Double-ended tool to offer a straight boot and a 90boot
Flashes a mirror image of the ignition spark

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

One of the most important parts of your lawnmower is a pulley system to ensure that it can smoothly spin and properly route any belt. The main function of these pieces is found on either side, where they help guide belts around driven spindles.

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. The 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 replaces them if needed.
  • Re-install all the parts in the same way they opened.
  • Check these re-installed new components by starting the engine.
Deck Idler Pulley
• Compatible with Craftsman, Husqvarna, Poulan mowers
• Durable
• Easy to install
Deck Belt
• Compatible with Craftsman, Husqvarna, Poulan mowers
• Easily Installable and adjustable
• Strong cushion rubber, strong tension, and no elongation polyester rope
• anti-flexibility and can maintain the cross-section shape of the tape and protect the center of the tape

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 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 with your hands without wasting your savings on lawnmower maintenance.

Happy Mowing!

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