Why does my riding lawn mower only run with the choke on?
If your lawn mower only runs with the choke on, check the carburetor. The carburetor brings air and fuel together and mixes them in the perfect ratio for combustion before they enter the engine. There are several passages in the carburetor that allow fuel to enter the air stream depending how the throttle is set.
Why is my lawn mower choking out?
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.
How do you know if your carburetor is bad on a riding lawn mower?
Dirty Carburetor Symptoms
- The lawn mower engine has trouble starting.
- The engine starts but stalls while you’re cutting the lawn.
- The engine runs rough during mowing.
- Black smoke is seen coming out of the muffler.
- There is a noticeable increase in fuel consumption during normal lawn mower use.
How does a closed choke work on a lawn mower?
In this condition the closed choke provides enough extra fuel to enter the engine to overcome the lack of fuel flowing through the other passages. The engine runs until the choke is opened. The fuel supply is then starved by the blocked fuel passages, and the engine dies.
How to fix auto choke on Briggs and Stratton lawn mower?
Easy Step by Step instructions for fixing the Auto Choke on a Sears Craftsman Lawn Mower with a Briggs and Stratton engine. Air Vane Spring 790849 part. Thermostat 593208 motor won’t start repair honda snapper toro poulan lawn-boy husqvarna john deere cub cadet murray mtd troy built yard machines carb This is what I purchased. Thanks.
What to do when your lawn mower won’t run?
The engine runs until the choke is opened. The fuel supply is then starved by the blocked fuel passages, and the engine dies. You have a couple of choices to solve this problem: clean the carburetor or replace it. Most carburetors can be cleaned and made to run like new again.
What to do when your lawn mower spits and dies?
It starts fine and runs fine for about 4 -5 minutes then starts spitting and sputtering. If I hold the choke half way with my finger it will smooth out for another minute but starts spitting again and dies. I have already replaced the needle valve and fuel filter. Float looks fine and choke return spring is fine. Any other suggestions?
How does a choke work on a lawnmower?
The choke on an engine serves to regulate air intake into the motor to allow the engine to start under different conditions, and is controlled via a lever on the mower. The choke is not typically used when the engine is warm and recently in use, but the “Full Choke” option is often selected when starting the engine from a “cold start.”.
How can I troubleshoot Craftsman lawn mower problems?
- Check for any leaks under the Craftsman push mower. Any leaking from the lines indicates a line problem.
- Change the spark plug if the mower has no leaks. Change it with the recommended spark plug in the manual.
- Change the air filter for better air flow.
- Replace the line filter.
What is the choke for on a lawn mower?
If the mower is cold, set the choke. The choke helps provide a richer fuel-air mixture to the engine, which helps it stay running until it warms up. Once the mower has been running for a few minutes turn off the choke.
Where is the choke on a craftsman lawn mower?
Connect the end of the throttle cable that contains the spring to the opening on the left-hand side of the Craftsman mower’s blade control handle. The end of the cable has a curved hook that simply slots into the hole. When the blade control handle is pulled back, it pulls the cable tight and opens the choke on the engine.