the spark plug. What do I need to do?
Personal Pace CARB Walk Power Mower

Experienced gardeners share their insights in answering this question :
Most likely you’ll have to remove the bowl
nut, under the carb’s bowl. You’ll most likely find varnish in the
jet, or maybe water. These are some typical jets, Tecumseh. Briggs,
similar (baymee Lehigh Valley PA, 2009).

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 :

Q. Why is my lawn mower turning over but not starting? The most likely reason is bad gas. Gas that sits for many months during the off-season will eventually break down, gumming up the fuel line and carburetor in the engine and preventing it from starting.
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 filter chokes off air to the engine making it hard to start so check to see if yours needs to be replaced. If you need a new filter be sure to use the original manufacturers part or the correct Toro replacement. These can often be purchased at your local Toro dealer or a home improvement store.
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.

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.
Air must replace gas as it leaves the tank. A vented cap allows your mower gas tank to breathe, and that`s important. What is this? A blocked gas cap is a common cause of engine stall, (more on this below).
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.
An airlock is one of the common causes why your mower won`t start after running out of fuel. An Airlock occurs when air replaces fuel in the fuel lines. As you refill your fuel tank, you could push the air towards your mower`s carburetor, which keeps the new fuel from reaching the engine.
Disconnected, dirty or fouled spark plugs are common causes for engines that won`t start. For small engines, spark plugs typically need to be replaced every season or after 25 hours of use. You should also check to make sure the spark plug gap is set correctly.

Discover Relevant Questions and Answers for Your Specific Issue

the most relevant questions and answers related to your specific issue

Toro Model 20041 sputters and stalls out; If I cover the primer bulb the engine will rev up and run. Also the mower won’t start unless I clean the spark plug. What do I need to do?
ANSWER : Most likely you’ll have to remove the bowl
nut, under the carb’s bowl. You’ll most likely find varnish in the
jet, or maybe water. These are some typical jets, Tecumseh. Briggs,
similar (baymee Lehigh Valley PA, 2009).

Will not start turns over has spark the engine was running and killed and will not restart
ANSWER : If you have good fuel to the plug and a good spark and it still does not start it could be a timing issue, check the flywheel key has not sheared.

My toro 6.5 hp push mower (2010), has no fire to the plug. I have not abused it. i have a small yard and it just gets normal use. Now it won’t fire. I first changed the fuel and cleaned the carb thinking it was that crappy ethanol again. but i grounded out the spark plug and cranked it…no spark. I think it has to do with the lever you pull back to start it . they have some stupid complicated safety contraption that rides along the fly wheel when you pull back on the handle for starting and shutting off the engine. …it looks worn out already…like a mini brake pad. any ideas?…do i really have to replace this garbage every year or am i on the wrong path here?
ANSWER : Unhook your wire from the coil that goes to shut off mechanism, and see if you have spark then. the wire may be grounded out, or your coil might have took a ****

Spark plug it’s dry in not getting fuel to that
ANSWER : Clean your carb real good you will be amazed!!!!!!!!

I have trouble starting a toro walk behind mower
ANSWER : All, I thought my carb was shot, so I replaced it. Still, start but no run (and had to use starting fluid). THEN!!! I noticed the spring to the “rev limiter” (just below and towards rear of carb) was not “tight”. The stupid bracket that holds the end of that spring had been bent down ~1/16″ and that caused all this heartache. CHECK YOUR REV LIMITER!!!

Toro 149cc Lawn Mower Won't Start – Toro Lawn Mower With Toro Power Tools
ANSWER : Bad carburetor your old fuel jammed up the jet so it won’t get fuel and if it does it will start and shut off So replace the carb or try to clean the jet and run non oxy fuel only

Toro model number 200065 won’t start. New gas, new spark plug, cleaned air filter. Doesn’t feel like fuel is in the primer bulb when I prime it.
ANSWER : Some toro primer bulbs don’t fill up with fuel but blow air into a chamber in the carb that has fuel in it so when you press the bulb, the air sprays fuel into the carb ( just a little) So since it won’t start, the bulb probably has a very small crack in it. replace it and then try it.

Mower won’t start. Toro mower..engine won’t turn over. Cleaned sparkplug…checked air filter..weather cool. Followed instructions for cold engine…prime witrh three pushes of the bulb..wnon’t even hint at a start..
ANSWER : Something everyone over looks is oil. Did you check the oil? You seemed to mention everything else but. If you have a low oil switch with low oil it will not start