20 hp 42″ Lawn Tractor

Experienced gardeners share their insights in answering this question :
Check the safety switch on the pedal

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 :

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.
A full gas tank and oil reservoir are the essential first steps when checking why the lawn mower won`t stay running, but the problem could also be a dirty filter, clogged carburetor, improper fuel mixture, or a dirty spark plug.
This is most likely a safety switch issue. Usually the seat safety switch will cause this problem. The mower dies because it thinks nobody is sitting in the seat, and shuts off for safety reasons.
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.
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. Contrary to what the movies might make you think, gasoline itself is not very flammable.

If your lawn mower starts, runs for a while, then dies, check the ignition coil, gas cap, and spark plug. One or more of these parts could be causing your problem. Follow our repair and symptom guide to help you fix this.
Dull, damaged or loose blades. If your blades are not sharp, are damaged or are not properly attached, this may also cause the engine to stop, especially when cutting thicker grass. Making sure the blades are in good condition and are properly attached should also be a part of your annual mower tune-up in the spring.
Condensation inside the gas tank is one culprit, but moisture can also enter the system through a loose or ill fitting gas cap. The best solution is to drain the mower`s gas tank and refill it with fresh gasoline. A clogged fuel filter can also cause a mower engine to die.
This could be caused by not enough air getting into the system, not enough fuel getting into the system, or the fuel/air mix not burning well enough once it gets into the cylinder. It`s probably a clogged air filter. Could also be a clogged fuel filter or a bad spark plug.
Other things that could cause this issue are bad fuel, weak/colapsed/kinked fuel line, faulty spark plug, faulty ignition/coil, oil over full, clogged air filter, plugged/dirty carburetor, worn engine parts internal rings/valves/etc.
Most riding mowers last between 500-700 hours, although some can run for as much as 1,000 hours if cared for and maintained properly.
If a mower is hard to start, it may be the result of a dirty carburetor and/or a clogged air filter. Use a screwdriver to remove the carburetor and clean any dirt out of it with a rag. Clean the air filter or replace it if it`s disposable.
Potential causes. Dieseling can occur for several reasons: Built-up carbon in the ignition chamber can glow red after the engine is off, providing a mechanism for igniting unburnt fuel. Such a thing can happen when the engine runs very rich, depositing unspent fuel and particles on the pistons and valves.
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.
Condensation inside the gas tank is one culprit, but moisture can also enter the system through a loose or ill fitting gas cap. The best solution is to drain the mower`s gas tank and refill it with fresh gasoline. A clogged fuel filter can also cause a mower engine to die.

Discover Relevant Questions and Answers for Your Specific Issue

the most relevant questions and answers related to your specific issue

How do i install a mulching plug on my craftsman lawn tractor?
ANSWER : It covers the hole on the deck

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I have problem with pulles an my craftsman 17 hp 42in
ANSWER : YOU MUST USE SEARS BELTS ! THERE A ODD SIZE

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Can’t get front wheel back on lawn tractor
ANSWER : Grease your shaft and make sure you have no dirt on it, even dust can hinder getting it on right.

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Why does my lawn tractor shuts off – Craftsman 20 hp 42 in. Deck Lawn Tractor – CA Model
ANSWER : How your fuel cap vent?

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Depress clutch, start mower, let out on clutch mower dies. Will run if parking brake is set. Turn blade on dies, put in gear dies. Could it be the switch on the seat?
ANSWER : Almost certainly it is the park break switch,i would start there.

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The oil will not drain out of my craftsman 18 HP Briggs & Straton riding lawn mower. I unplug the drain cap. I took the dipstick out, but the oil will not drain out. The dipstick indicates the oil is full. It’s acting as if the oil is clogged. It’s been sitting since last summer. How can I get the oil out?
ANSWER : Did you push in and turn the little pipe you took the cap off of to open it???

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Mower runs for about 5 min, than dies won’t restart . When cool start up ( craftsman 42 in deck 19.5 hp lawn tractor )
ANSWER : Check for spark when it dies you could have a bad coil

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Is the battery 12 volt? – Craftsman 20 Hp 42" Deck Lawn Tractor
ANSWER : Yes. When you go get a new one try and spend alittle more and get the highest ctanking amp battery you can. Most auto part, walmart, lowes, homedepot or small engine repair stores will carry what you need.

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