Riding Lawn Garden Tractor 25hp Kohler 50″

Starts and then after driving only a few feet it stall out
Experienced gardeners share their insights in answering this question :
If it starts fine and idles fine but then stalls or doesn’t have power when you juice it, it sounds like a fuel problem. It is unlikely a carb issue if it gets regular use and as long as its not sitting for long periods of time.

I would first check the fuel filter. If that’s fine, then I would check the vent hole on the gas cap (if you have one). If it is a gravity-fed fuel system and the vent hole on the gas cap is clogged with dirt, dust, and debris, then the gas will not flow to the carb fast enough and you’ll get a very lean mixture. Sure, it will idle fine because the engine isn’t demanding much fuel at idle, but when you open up the throttle it will stall because the air:fuel ratio will be too high (symptomatic of a lean mixture)

Last thought: Dirty air filter

Let me know if this helps

How to Identify and Fix Common Gardening Problems ?

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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.
Loose, Dirty or Disconnected Spark Plug in Your Lawn Mower: Check it out, clean off debris, re-connect and tighten. Dirty Air Filter: Clean or replace. Fuel Not Reaching the Engine: Tap the side of the carburetor to help the flow of gas. If this doesn`t work, you might need a new fuel filter.
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.

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.

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.
There are three major causes for a stalled engine: A lack of fuel, a lack of air flow and improper ignition. Running out of fuel is one of the most common causes of engine stalling, but dirty fuel injectors or a plugged fuel filter can also be the culprit.
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.
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.

Discover Relevant Questions and Answers for Your Specific Issue

the most relevant questions and answers related to your specific issue

My Ryobi C430 stalls when I try to give it gas. It idles fine though.
ANSWER : Remove the muffler and try it if ok with out it open the muffler and clean off the internal screen

Belt for self popelled mower keeps breaking? Cannot keep a new belt on pulley
ANSWER : Check that the pulley isn’t seizing up and causing the belt to snap, also be sure you loosen up the self propelled mechanismn by spraying down with WD 40, too much belt tension can cause this, but it rather seems like the belt pulley seizes and the engines drive pulley keeps turning causing the belt to overheat and break or stretch and come flying off.

My poulan saw keeps stalling and has no power
ANSWER : Check the fuel filter, air filter, and muffler for clogging. Check the fuel lines for condition. The carburetor may need cleaning and re-kit. Make sure the chain is being properly oiled and sharpened. Good luck!

Stalls under load nearly new chainsaw ran great last fall this spring stalls under load starts and runs fine otherwise
ANSWER : Try opening up the high speed jet, see if it does any better. Turn it just a quarter turn at a time, if opening it up doesn’t do anything, try closing it. If that doesn’t do it, try closing it down all the way, then open it up 1 1/2 turns, this will put you into run mode, you can adjust it from there. You have 2 screws on the side of the carb, low, high, they are marked, don’t be afraid to turn, that is what they are for. Check it out.

Stalls. even when warmed up it will stall despite playing with the gas trigger
ANSWER : Hi and low fuel adjustments need set and try cleaning the carb

Cub cadet keeps stalling – Mtd 19 In. 173 CC OHV 3-In-1
ANSWER : Do you have last years gas in there?try fresh gas then clean out the carb

It keeps stalling after only a few minures
ANSWER : Suspect Ignition Coil is failing under heat.
To test this, take the unit outdoors and have a fire extinguisher handy. Start and allow unit to run until it shuts down. Then remove spark plug and test for spark by grounding the outer shell of the plug on the engine’s metal surface.

Keep your face away from the spark plug hole as you pull the rope to test for spark. Expelled fuel or vapors can ignite via the removed spark plug or any subsequent arc.

If no spark when hot, and good spark when cold, replace ignition coil.
Find your EXACT model number on your unit, then go HERE to lookup the part number of the coil. Call your local reputable repair shop and ask if they have it in stock or can order for you.
Hope this helps.

My mower is 4 months old, I used it 5 times in the spring and tried to use it today and it would only start after I primed it. It stalls after 2 seconds every time.
ANSWER : The float and needle are stuck (if carb separate from tank), the main jet is plugged with trash, or the diaphram needs replaced (carb mounted on tank)(not so likely with as little age as this has on it)