Experienced gardeners share their insights in answering this question :
Maybe safety switch in seatalso check to be sure blades move freelyno stuck belts or pulleys

How to Identify and Fix Common Gardening Problems ?

We provide a variety of viewpoints on how to identify and fix common gardening problems. Our sources include academic articles, blog posts, and personal essays from experienced gardeners :

What`s happening? This is a normal function of the seat safety switch. With the blades engaged, weight from the operator allows the seat safety switch to keep the engine running.
The pulleys in your lawn tractor are driven by the drive belt, and turn the spindles. If a pulley doesn`t spin freely, it can cause the engine to die when the blades are engaged. To check the pulleys for sticking and damage, first remove the drive belt from the engine pulley and lift the lever to engage the blades.
A clogged carburetor is most commonly caused by leaving fuel in the lawn mower for a long period of time. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. This sticky fuel can clog up the carburetor and cause the engine to stall.
Check that all the safety switches are working correctly, it is possible the seat switch is bad or loose plug/ bad wire. Also if battery weak or charging system weak/faulty the clutch will stall out engine, charge battery up with charger and try.
If you find that your lawnmower keeps dying, or keeps stalling while cutting grass, then inspect the spark plugs. Look for signs of damage or wear. Something as simple as a cracked porcelain insulator can mean an electrode has been damaged or burned away.
A Dirty Carburetor Can Cause a Lawnmower To Start Then Die

By far, the most common issue that causes a stalled motor is a dirty carburetor. The carburetor on your engine is the thing that draws in air and mixes it with the fuel.

Belt-the number one cause for your blades not to engage is that your belt is either stretched or loose causing it to slip or fall off completely. Belt could have snapped also. When you are trying to process too much grass/leaves they could pack up under your deck and push off your belt.
With proper maintenance, you can expect your Husqvarna riding mower to last up to 10 years or more. How long it will last depends on the model and how well you take care of it. Generally speaking, a Husqvarna riding lawn mower should last for at least 5-7 years with basic maintenance.
Clogged or Dirty Air Filters

It is one of the most common problems that cause lawnmowers to sputter. The mowers take the air from the surrounding through air filters and mix it with fuel inside the engine. So, if the air filter is clogged or dirty, it will affect the flow of air into the carburetor.

(1) The blades should always be turned on at full throttle if the mower has a electric P.T.O. switch.
When a spark plug becomes fouled, the tips become coated with fuel, carbon, oil or dirt. This interference limits the ignition power needed for mowing on level or uphill surfaces. Maintain your spark plugs by changing them every season or regularly removing and cleaning the tips.
If your lawnmower`s battery is not charged, it may stall during mowing. A bad battery will take longer to charge or will not charge completely. If they charge, the cells may go down quickly, rendering service unavailable.
The most common cause of a mower that runs for thirty minutes and then dies is a faulty armature. A faulty gas cap is the second most likely cause.
Your lawn mower runs for 30 minutes then dies if you are having issues such as a bad spark plug, air problems, a malfunctioning carburetor, or a faulty gas cap. You may even encounter the issue that your lawn mower runs for 5 minutes then dies.
If the PTO clutch is not getting power, if the clutch solenoid is defective, or if the clutch is worn out, the lawn mower blades will not engage. The PTO clutch is not repairable—if the clutch is defective, you must replace it.

Discover Relevant Questions and Answers for Your Specific Issue

the most relevant questions and answers related to your specific issue

Whenever I engage my PTO may engine bogs down, what may be causing the problem?
ANSWER : Do you mean when you engage the cutters? if so then chances are on of the blade spindles may be seized or stuck, disconnect the belt from engine pulley and try turn the blade spindle pulleys by hand one at a time to see if they are spinning freely

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When engaging electric clutch for the blades it seems to turn and of course pulls the wires into
ANSWER : The clutch is mounted to a plate. The mounting bolts must be out.

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Blades will not engage on Husqvarna riding mower.
ANSWER : I have a Husqvarna GTH2548 and the blades will not engage. It is free from all debrie

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Mowing deck makes ticking noise when blades are engaged.

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Engine dies if i engage blades or take my foot off the brake
ANSWER : You likely need to replace the brake switch,the seat switch can also cause the same problem.Most likely problem is the seat switch,i would try that first.The pto or the reverse switch can cause a shut down but not until you try to mow,seat switch is the most suspect.

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I started the mower but the blades will not turn. I shut it off and was able to manually turn the blades by hand. I also was able to turn the belt wheel under the engine and have it turn the blades. With it running and me on the seat, they don’t turn. With it running; brake engaged; and I pull the mower switch to engage them, the mower wants to die. Two questions: Is there a swtich on the seat to insure the blades can not turn while no one is on the seat? Is there a key between the belt wheel and the PTO shaft that needs to be replaced? Thank you.
ANSWER : Most all riders have a safety seat switch now and they do malfuction alot. They are under the seat and are ez to replace most of the time. First look for a wire that is grounding due to rubbing a sharp object. That can be fixed with black tape

Good luck!!!

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I have a husqvarna riding mower that when i engage the blades the engine stops running
ANSWER : Could be something jamming a blade or belt. With the engine OFF and the key OUT make sure the blades and belts all move freely by hand. Clear out all grass and c**p from the blade and belt areas. You may have to remove the blade deck to do this – instructions are in your manual or download a manual from the Husqvarna website. Good Luck!

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When i engaged the blades it blows the fuse – Husqvarna Zero Turn Mower Z5426
ANSWER : There is a fault in the blade engagement circuit. Using a multimeter or test lamp, check the switch, solenoid and wiring. Work logically and patiently and you will find the faulty component (tip – start with the solenoid) Good luck

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