Why Does My Mower Start Then Die?

Where do you spray carb cleaner on a lawn mower?

Spray the cleaner on the choke shaft at the base of the carburetor’s throat to remove any additional grime after shutting off the engine.

Replace the carburetor cover and linkage, push the air filter back in place and screw the air filter cover back in place..

Can you clean a carburetor with wd40?

Aerosolized and applicable to nearly any carburetor, WD-40’s fast-acting carb cleaner uses a solvent formula to break away stubborn carbon contaminants, leaving you with a clean carburetor. WD-40’s blend of cleaners can be used on any unpainted metal parts.

Can you clean a lawn mower carburetor with wd40?

Aerosolized and applicable to nearly any carburetor, WD-40’s fast-acting carb cleaner uses a solvent formula to break away stubborn carbon contaminants, leaving you with a clean carburetor. WD-40’s blend of cleaners can be used on any unpainted metal parts. … The fast-acting formula cuts cleaning time in half.

Why does my mower keep shutting off?

The carburetor might be clogged. A clogged carburetor is most commonly caused by leaving fuel in the lawn mower for a long period of time. … This sticky fuel can clog up the carburetor and cause the engine to stall. If the carburetor is clogged, try cleaning it with carburetor cleaner.

Why does my lawn mower only run for a few seconds then dies?

It could be from a dirty carburetor, a malfunctioning spark plug, insufficient flow of gas to the engine or a clogged air filter. But if your lawn mower starts then dies, the causes could also be the same. The most common cause of why a lawn mower starts then dies can be due to a carburetor problem.

Why does my lawn mower shut off when I engage the blades?

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.

What causes vapor lock in lawn mowers?

Vapor lock generally occurs when the fuel (usually gasoline) within the fuel delivery system overheats and vaporizes too rapidly. The resulting excess gas bubbles accumulate to the point of actually blocking normal fuel delivery.

Why is my lawn mower turning over but not starting?

The most common reason for a riding mower cranking over but not starting, is bad gas, but other possible reasons include: Gas Valve Off. No Gas. Choke Fault.

How do you fix lawn mower that starts then dies?

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. To determine if the fuel cap vent is clogged, try slightly loosening the cap and then starting the engine.

Why does my lawn mower sputter then die?

A Mower Has to Breathe Your mower pulls in air from outside and mixes it with gasoline for the proper explosion inside the engine. … If the hole is restricted, the cap bent or the seal under the cap damaged, the engine may be getting too much or too little fuel. Replace the cap to solve sputtering and dying.

How do you fix a clogged carburetor?

Clean your Carburetor in 10 Simple StepsStep 1: Remove the spark plug cap so the engine doesn’t fire. … Step 2: Next, drain the fuel. … Step 3: If the carburetor bowl has a sticky residue in it, spray the inside with carburetor cleaner and wipe it clean. … Step 4: The main jet’s passage is where fuel flows through the carburetor into the combustion chambers.More items…

How do I know if my lawnmower spark plug is bad?

The most common way to tell if your lawnmower spark plug is bad, is the engine being more difficult than normal to start. Since the engine only starts due to two principles: Gas & Spark, and assuming you have filled the gas tank – its most likely the spark, or a lack thereof.

Can you clean a carburetor without removing it?

Use carburetor cleaner to remove deposits, clogs & debris Deposits inside the carburetor can clog fuel and air passages and reduce performance or stop the engine altogether. Luckily, you can take care of many of these problems quickly and easily; often without even removing the carburetor from the engine.

How do you clean a carburetor on a lawn mower without removing it?

However, you can not spray the carburetor when the engine is off since it cannot do the cleaning without being propelled. All you need to do is to start the engine and spray directly at the center of the carburetor while it is running. Any deposits clogging in the carburetor will easily be removed.

How do I clean a small engine carburetor without removing it?

Spray with the aerosol cleaner As I’ve told you earlier, you’ve got to have a good and quality carburetor cleaner aerosol spray to clean it thoroughly; this is where it’s going to be used while cleaning your carburetor without removing it.

Why does my Briggs and Stratton engine only run on choke?

If your lawnmower will start and run with the choke on but dies when the choke is turned off, it may have a problem with the carburetor. … The carburetor brings air and fuel together and mixes them in the perfect ratio for combustion before they enter the engine.