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HomeRepair HelpYard Machines RepairYard Machines Lawn mower won't start Repair
Yard Machines Lawn mower won't start
If your Yard Machines lawn mower won't start, begin with the most common failure points: the spark plug and the carburetor. A worn, fouled, or damaged spark plug can keep the engine from firing, so inspect it closely and confirm spark with a spark plug tester while cranking. If the plug checks out, a clogged carburetor is the next likely cause, especially if old fuel sat in the mower and left sticky deposits behind. In many cases, cleaning the carburetor with carburetor cleaner will get a lawn mower not starting again, but you may need a carburetor repair kit or a complete carburetor replacement if the blockage is severe. Bad gasoline in the carburetor float bowl can cause the same no-start condition. After that, check the start switch for continuity with a multimeter, then inspect the fuel pump, including the pulse port line, diaphragm, and check valves, since a weak pump can starve the engine of fuel. Whether your push mower won't start or your Yard Machines lawn mower has spark but won't start, enter your model number on RepairClinic.com to find the exact replacement part that fits your mower.
01 - Yard Machines Spark Plug
Inspect the spark plug for signs of wear or damage. If the porcelain insulator is cracked, an electrode is burned away or damaged, or there is heavy carbon buildup at the electrode, replace the spark plug. To determine if the spark plug is defective, use a spark plug tester. You should see a strong spark between the tester’s terminals when the engine is cranking. If there is no spark, this indicates that the spark plug is defective and should be replaced.
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02 - Yard Machines Carburetor
The carburetor might be clogged. 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 prevent the engine from starting. If the carburetor is clogged, try cleaning it with carburetor cleaner. If cleaning the carburetor isn’t effective, rebuild or replace the entire carburetor.
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03 - Yard Machines Carburetor Repair Kit
The carburetor might be clogged. 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 prevent the engine from starting. If the carburetor is clogged, try cleaning it with carburetor cleaner. If cleaning the carburetor isn’t effective, rebuild or replace the entire carburetor.
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04 - Old or Bad Gasoline
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 prevent the engine from starting. If the carburetor is clogged, try cleaning it with carburetor cleaner. If cleaning the carburetor isn’t effective, rebuild or replace the entire carburetor.
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05 - Yard Machines Start Switch
To determine if the start switch is defective, use a multimeter to test it for continuity.
Highly Likely
06 - Yard Machines Fuel Pump
The fuel pump has three ports: the gas in port, the gas out port, and the pulse port. The pulse port is connected to the engine crankcase by a small rubber tube. As the engine runs, air inside the crankcase alternately pressurizes and depressurizes the air in the tube. This pressurized air moves a diaphragm inside the pump and pumps the gas. If the engine oil is overfilled, oil can enter the pulse port line, preventing it from working properly. The fuel pump also has two small check valves on the input and output ports. The check valves prevent fuel from reentering the gas tank. These check valves can fail. To determine if...
Highly Likely
Frequently Asked Questions
Why won't my Yard Machines lawn mower start even though it has fuel?
My Yard Machines mower has spark but won't start. What should I check next?
How do I know if the start switch is bad on my Yard Machines lawn mower?
Can old gas keep a Yard Machines push mower from starting?
How do I find the right spark plug, carburetor, start switch, or fuel pump for my Yard Machines mower?
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