nd then it does the same thing. is there a safety cut out
Craftsman

Bought mower used.
had to let it set four or five times, in order to finish lawn (5/8 acres).
got it in garage, let it run with no load. after a few minutes, motor rpm fluctuated and then died.
Experienced gardeners share their insights in answering this question :
There could be some type of contaminate in your fuel/lines. Check for that!Then check your fuel filter. and hoses.Your carb needs to be rebuilt!

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 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.

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.
If your lawn mower starts, runs briefly, then dies these are the four most common reasons that`s happening: Dirty carburetor / clogged carburetor bowl. Old gasoline that has gone bad. Dirty or defective spark plugs.
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.
The most common reason your car starts then dies immediately is because of a lack of fuel in the engine. This often happens because there is a small amount of fuel in the fuel rail, which helps to start the engine. However, there is no fuel pressure to keep the engine running.
The carburetor might be clogged. A clogged carburetor is most commonly caused by leaving fuel in the engine 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.
As the fuel level drops, a vacuum begins to form in the fuel tank because air can get in to fill the space the consumed fuel occupied. After about 10 or 15 minutes, the vacuum will become strong enough that fuel will stop flowing to the carburetor and the lawnmower will die.
Replace the Spark Plug. If your lawn mower starts then dies right away, another possible culprit for the issue is the spark plug. A spark plug problem will result in the mower being more difficult to get going, and in some cases, the faulty spark plug may prevent it from starting at all.
Being Overworked. One of the most common reasons that a lawn mower might stall while it is cutting grass is that it is being overworked. This is a mechanism that is intentionally incorporated into the mower to prevent the motor from being blown.
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.
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.
A dirty carburetor is the most common cause of a lawn mower that starts and then dies. Other possible causes include: Stale/Dirty Gas. Faulty Choke.
Being Overworked. One of the most common reasons that a lawn mower might stall while it is cutting grass is that it is being overworked. This is a mechanism that is intentionally incorporated into the mower to prevent the motor from being blown.

Discover Relevant Questions and Answers for Your Specific Issue

the most relevant questions and answers related to your specific issue

18 hp kohler engine starts but doesn’t keep running!!!!
ANSWER : You put in a question about your ride on. What is it you need?

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I have a Vtwin Kohler Command Pro 25 hp CV730S. My son was cutting the neighbors lawn. Grass was tall, with an 1/8 of an acre left to cut it started to rain. The engine started making a banging noise. Something like a rod knock. When the rpm’s are high the noise lessens. When the rpm is low the noise is loud. We have not started it since. Do you have any ideas where to start looking or what it can be?
Thanks
John
ANSWER : Is the nois from engine or from cuting system?

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Engine cuts out when engaging clutch or engaging blades..
ANSWER : Lift the seat and make sure the connector is firmly plugged into the seat switch

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Kohler engine will not start
ANSWER : Check for power at the fuel solenoid

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LT-1000 18 hp. engine starts and runs fine at idle but when you attempt too engage blades or move the mower in reverse it dies
ANSWER : Sounds like a micro switch issue, check the switch under the seat this is the most likley suspect.

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Question on craftman riding mower
ANSWER : With the ground wire off the coil and it turns over, you have a bad coil these engines are notorious for this. GOOD LUCK…..

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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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LTX 1000 craftmans rider 18 hp ohv kohler rpm fluctuates, then dies. I let it sit for ten minutes and then start it and mow for a few minutes and then it does the same thing. is there a safety cut out
ANSWER : There could be some type of contaminate in your fuel/lines. Check for that!Then check your fuel filter. and hoses.Your carb needs to be rebuilt!

Read Full Q/A … : Craftsman