Craftsman
Experienced gardeners share their insights in answering this question :
Spark plug should be replaced and gap checked.
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 :
There may be old or bad fuel in the carburetor float bowl. 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 make the engine hard to start. If the carburetor is clogged, try cleaning it with carburetor cleaner.
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.
Try replacing the fuel filter; a clogged one will make the mower run sluggishly. Alternatively, check the spark plug. A spark plug that`s outlived its usefulness can cause a sluggish start. Pull the spark plug out, clean it off and reinstall it in the mower.
Starting a mower is a straightforward procedure. But before you start your mower, it`s always a good idea to check the fuel and oil levels. Do a quick check over, looking for any loose or damaged parts. Turn the mower over, carburetor side up, and check for grass build-up and blade condition.
Check the Spark Plug
Spark plugs that are old or don`t function well make it harder for the engine to start. This usually results in the person using the lawnmower needing extra muscle to get the machine running. Make sure that you invest in good spark plugs that will hold up well over time.
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.
A dirty carburetor is one of the most common causes for a lawn mower not being able to start after sitting unused for months or years at a time.
If the engine starter motor turns over, the starter solenoid needs to be replaced. If the engine starter motor does not turn over once a jumper wire is connected to the two large lugs on the starter solenoid, replace the engine starter motor.
Problems arise in cold weather, because cold air is oxygen-rich, as you can imagine throws the ratio way off. Without the choke, the engine gets too much air for the amount of gas the engine receives. We call this a lean condition. A mower just won`t start or starts and stalls right away when the AFR is too lean.
Some of the B&S auto choke carburetors tend to supply too much fuel to the cylinder when hot starting; this floods the spark plug, causing a no start. They have since modified the carburetor. So if you have an auto choke, Briggs, with the hot start problem, go ahead and swap out the carburetor.
Some of the B&S auto choke carburetors tend to supply too much fuel to the cylinder when hot starting; this floods the spark plug, causing a no start. They have since modified the carburetor. So if you have an auto choke, Briggs, with the hot start problem, go ahead and swap out the carburetor.
Discover Relevant Questions and Answers for Your Specific Issue
the most relevant questions and answers related to your specific issue
I have had a poulan pro 550 series push mower for almost 1 year at the end of the season last year the mower would start briefly and then stop. i have cleaned out the air filter and that did not help.the mower started, i made one revolution around the yard 3/4th of the way the mower quit. I then primed the mower it started then quit and now it will not start at all. Does anyone have any suggestions of what to do. Thanks
ANSWER : There is a little spring that works the carburetor arm. If that popped off then the mower will not run.
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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!!!
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<!– from fixya rte –>Rj19lm plug gap for a 195cc 4cyl lawnboy – Lawn-Boy lawnboy" Mower Blade 21"
ANSWER : As a starting point in my shop i always use 0.30 in. For all my mowers
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Lawn mower cranck but wont start…
ANSWER : Since you already checked for spark and air I would drain all the fuel out of it and check that fuel for water. Over time some lawn mowers end up with contaminated fuel. You can see the water sitting on the bottom of the fuel if you let it stand for a bit in a small plastic bowl.
Be sure to empty and dry out you fuel can as well. Especially if the mower stopped running right after a refuel. Which is a good sign your gas can is contaminated too.
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Wont start no ignition put new plug in and fuel filter
ANSWER : Flush gas tank, fill with fresh gas and Stabil. Replace air filter. Remove bowl from carb clean bowl and holes in bowl screw.
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Lawn mower will start and run for 5 seconds and shut down
ANSWER : Will it stay running with your choke on? if so then clean your carb. if not then look for a blockage from tank to carb. ie fuel shut off, deteriorated fuel line. plugged filter etc
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Why wont my mower start and gas comes out of muffler
ANSWER : Carb is flooding out ether bad plug or your carberator needs rebuilt
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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
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