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Troubleshooting a Riding Lawnmower

A riding lawnmower in need of repair.
Determining why your riding mower won't start, constantly stalls, or how to repair other mechanical issues can sometimes be a matter of trial and error. There are many suggestions to help you track down the problem and make the necessary repairs on this page.
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38 Questions

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July 21, 2021

My Husqvarna rider was running fine for about 45 minutes, then stalled. When I try to start it, it clicks like it is trying but seems like it isn't turning over. Any ideas? Thank you.


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Gold Feedback Medal for All Time! 949 Feedbacks
July 21, 20210 found this helpful
Best Answer

usually the first thing that comes to mind is a weak battery but it could also be that you have a bad solenoid.
Check out some of these articles and videos to see if this could be your problem.

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www.searspartsdirect.com/.../riding-lawn-mower-engine-clicks-but...
support.cubcadet.com/.../86-1
www.youtube.com/watch?v=AmXEbJDXRPY

You can also check out answers from similar questions:
www.thriftyfun.com/tf666549.tip.html

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July 21, 20210 found this helpful
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With the clicking sounds like you need a new cylinoid.. The 2nd thing I would check is to make sure your battery is new. Also check the battery clamps and check the terminals for any residue and clean with a wire brush. Next, check to make sure you have fresh gas in the gas tank. You may need to drain it and add fresh gas with an additive to keep it from gelling up.

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Silver Answer Medal for All Time! 440 Answers
July 30, 20210 found this helpful
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The problem is likely fuel related. Husqvarna says this may be due to a clogged fuel filter, restriction in the pick up or an improperly vented fuel cap. A clogged fuel filter restricts the flow of fuel to the carburetor. Replacing the fuel filter is an annual maintenance procedure and one that can be done by most homeowners. Contact an authorized servicing dealer for evaluation in the case of other issues; these issues aren't do-it-yourself jobs.

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As fuel is consumed by the engine, the level in the fuel tank lowers. To make up for this, the fuel cap uses a small vent to allow air to enter the tank. If the fuel cap vent is clogged, air won't be able to enter the tank and a vacuum or "vapor lock" will occur. This stops the flow of fuel to the carburetor causing the engine to stall.

The carburetor might be clogged. 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.

Inspect the spark plug for signs of wear or damage. If the porcelain insulator is cracked, an electrode is burned away or damaged, or there is heavy carbon buildup at the electrode, replace the spark plug.

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September 9, 2021

My Cub Cadet rzt s54, the blades will not engage. I have replaced: the PTO switch, the PTO clutch, the fuse, and the safety switch under the seat, but the blades still won't engage.


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Silver Answer Medal for All Time! 425 Answers
September 9, 20210 found this helpful
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I've had the same problem twice with my rider. Is there a drive belt for the blades? My Craftsman riding mower has a long belt that has to engage the blades when you move the "blade engage" handle. One time the belt broke and I needed a new one. The other time, there was so much debris on the mower deck, the belt wasn't making full contact with the belt drive spindles, as there was a bunch of dry leaves and grass wrapped around the drive spindles, making the spindles slippery so the belt was slipping.

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Once I really cleaned the mower deck well, everything was working fine.

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June 15, 2021

I have a sit on lawnmower and am having problems with the petrol getting into the oil sump.


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Silver Answer Medal for All Time! 440 Answers
June 23, 20210 found this helpful
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This can seriously damage the mower engine and turn out to be quite expensive.
Completely drain the oil tank using the drain plug and allow the oil tank to air out and dry overnight. Do this outdoors.

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If you have a Briggs one cylinder engine, then the problem is probably in the carburetor. It has a solenoid in the bowl which shuts off the flow of gas when the ignition is switched off. The design is faulty - the solenoid does not completely shut off the gas and so it allows a siphon action to empty the bowl into the intake manifold. The raw gas then leaks down the cylinder wall and into the crankcase. Contact a repair shop. They will install installed a manual cut-off valve in the fuel line. You have to remember to open the valve before you start the engine and close it when you shut the engine off.
Or replace the entire carburetor, it will be cheaper and easier than cleaning and replacing the carb parts.

On a 4-stroke it could happen, gasoline is running down the cylinder walls if mixture is way to rich.

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If it is a 2-stroke, gas and oil will be mixed before entering the cylinder. Check if there's a broken valve or something, so that gas can run down the oil line, if the engine is off.

Fill the oil tank with new oil. If needed, drain the oil tank again to ensure all of the gas is out of the oil tank before adding new oil again.

Seasonal storage is usually the culprit. You should run the engine dry and then add a non-ethanol fuel, then just run it dry one more time.

Lawn mowers with key left on overnight well sometimes leak gasoline into the engine cylinder and it'll slowly fill the engine oil case as the gasoline slips past the rings of the engine.

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August 9, 2019

I have a Cub Cadet that is 12 years old. It was tuned up and normally runs beautifully. Today, as I turned a corner, it stopped moving forward.

It starts up and idles, but will no go forward or backwards. The three belts are all there - none broken off.

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Bronze Feedback Medal for All Time! 196 Feedbacks
August 10, 20190 found this helpful

I ask this because it happened to a friend. Do you have a mouse or bee/hornet nest (or part of one) in the works?

My friend was mowing and the mower stopped. When she went to inspect she found part of a mouse nest. Once it was cleaned out, she was back to mowing.

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May 1, 2013

It is very frustrating to roll out your mower to cut the lawn only to find that it won't start. This is a page about Craftsman riding mower won't start.

Craftsman Riding Mower

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August 18, 2011

Mowing the grass is one of the rites of summer, but now your mower won't start. There are many things that can cause a riding mower to refuse to fire up. This is a page about troubleshooting a riding lawn mower that won't start.

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January 24, 2017

Trying to figure out why your lawn mower keeps stalling can be difficult. This is a page about Husqvarna riding mower keeps stalling.

Husqvarna Riding Mower on grass.

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January 4, 2017

This is a page about fixing a John Deere riding mower that keeps stalling. There could be a number of reasons for your riding mower to stall, especially if it is the first time you are using it for the season.

John Deere Riding
Mower

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April 27, 2017

You can almost hear the grass growing as you sit there trying to start up your uncooperative riding mower. This is a page about John Deere riding mower won't start.

Riding mower on trailer.

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January 4, 2017

This is a page about Craftsman riding mower keeps stalling. It is very frustrating when your mower keeps stalling. Sometimes you can make the repairs yourself.

Riding Mower

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June 26, 2017

Troubleshooting a non-starting riding mower can be a process. This is a page about Murray riding lawnmower won't start.

Riding Lawnmower

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April 29, 2017

This is a page about Husqvarna riding mower won't start. Determining whether it is a problem with fuel, spark or air when your mower won't start, can be a challenge.

A riding lawnmower, from the view of the seat.

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January 5, 2017

There are a number of reasons a mower won't start. Diagnosing the cause is the first step to making the necessary repair. This is a page about Craftsman LT 2000 riding mower won't start.

Craftsman Riding Mower Won't Start

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