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Why Does My Cub Cadet Keep Dying? Main Reasons and Effective Solutions

Cub Cadet has been leading the way in mowers for over 60 years. With a variety of models, Cub Cadet’s popular line of ride-on lawnmowers features that make for a more enjoyable and productive experience. 

However, sometimes users has been experiencing problems with its engine that causes it to die. There are many causes behind this issue.

In this article we’ll discuss about the identification of the causes a Cub Cadet to die and the possible fixes to this issue.

Cub Cadet Riding Lawn Mower
Cub Cadet Riding Lawn Mower

The main reasons behind a Cub Cadet to die

Though many things could cause a Cub Cadet to die, there are three main causes that can be easily fixed. One of these causes is a clogged carburetor. This is the main cause because it prevents the fuel from being able to get into the cylinders.

There are also other, lesser-known causes that can cause your Cub Cadet engine to die. The first is if the fuel cap gets clogged with dirt or debris, which can prevent gas from getting into the carbs and igniting properly. 

The second cause is if a spark plug has worn out and isn’t firing properly, resulting in less power in one or more cylinders. The Cub Cadet may also die having the gas contaminated inside it.

Clogged carburetor

A clogged carburetor can cause the Cub Cadet to keep dying. This occurs when fuel left in the lawn mower for a long time evaporates and leaves behind residue that can clog up the carburetor. 

Carburetor clog can occur when there is a buildup of contaminants in the fuel. The fuel may have ingredients that evaporate and produce moisture, which leads to condensation and blockage.

Dirty carburetor of a lawn mower
Dirty carburetor of a lawn mower

A plugged carburetor can cause an engine not to start because the air/fuel mixture is too lean. This can also lead to rough running, poor power, and decreased fuel economy.

Carburetors are typically made of metal or plastic that corrodes or deteriorates over time making them harder to clean. 

To prevent clogging from occurring, it is important that lawn mowers are used regularly and not left idle for long periods of time with leftover fuel in them. You can also use carburetor cleaner to clean the component.

Clogged Fuel Cap

A clogged fuel cap causes the Cub Cadet to die by not allowing air to enter the fuel tank. This will cause a vacuum or “vapor lock” at the carburetor, which stops fuel flow to the engine.

A fuel cap uses too small vent to supply oil. When it gets clogged, it can be the cause of continuous problems with the Cub Cadet engine. This is due to vapor lock or vacuum in which air won’t be able to enter the tank

It stops fuel flow to carburetor because vapor gets into fuel line causing it not be able to move out.

It’s important that you make sure that your fuel cap is always properly in place and cleared of debris. 

You can try to clean the component and start the engine. If it starts, then you are lucky and ready to go with your Cub Cadet. Or else, you might have to replace the fuel cap entirely.

Contaminated gas

The Cub Cadet engine is a small, reliable lawn mower. But if the gas tank gets contaminated, it will turn into a big mess. When fuel is left for a long time, it creates a thicker layer of condensation on the tank. 

The problem of contamination isn’t just limited to fuel left in the tank for too long; it also contains water that condenses in the tank and makes it harder for the engine to perform. 

This condensation can cause the gas to sputter or die. Tanks that are subjected to this problem may also have a greater risk of corrosion. If a fuel line becomes blocked, deposits inside the line will be created. 

It can clog up the fuel system and prevent the mower from starting at all. This is why making sure to check for deposits on your lawn mower should be a regular practice.

Worn out Spark Plug

Spark plugs are a common component in most gasoline- or diesel-powered engines. The spark plug is an electrical component that provides the spark needed to initiate combustion. 

Faulty spark plug of a lawn mower
Faulty spark plug of a lawn mower

It receives electricity from the ignition coil and transfers it to the engine’s cylinder, which creates a spark which ignites the mixture of fuel and air in combustion chamber.

Technology has revolutionized how we use our engines today by providing us with better fuel efficiency, less emissions, lower noise levels and easier starting. 

However, one of its downsides is a worn out spark plug can cause your engine to die without warning. Spark plugs are not maintenance-free components like tires or brakes. It can also causes your mower to turn over and prevent from starting.

Spark plugs should be inspected at every oil change for signs of wear or damage caused by carbon build up. One type of damage the technician will look for is the spark plug’s insulator has cracked, which can short-circuit current. 

An electrode on the spark plug may also be burned off during normal use, cutting down on its ability to generate enough sparks to fire up the engine. The carbon buildup on an old spark plug can also cause this problem. 

The accumulation of fuel in an engine’s combustion chamber can make generating sparks difficult.

Only one way to fix the issue is to replace the worn out spark plug with a new one.

Frequently Asked Questions

How long does a Cub Cadet battery last?

These batteries of Cub Cadet come with a three year manufacturer’s warranty. The tests have shown that they will generally last 5 to 6 years. They might need a replacement only once over that time span.

Do Cub Cadet Mowers have alternators?

When you hear the engine running on a lawn mower, you might not know that the alternator is also powering the machine that provides voltage to recharge battery and start the engine. 

You can use it to get the battery recharged in a short while and get go with your mower.


In this article we’ve discussed the main reasons and the quick solution to the issue that a Cub Cadet is keep dying. We hope, we’ve provided enough information regarding this that you might find the problem by yourself. 

Follow our guidelines to fix your issue. If you are unable to fix, you might get to professionals or contact with your dealer.

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