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HomeRepair HelpYard-Man RepairYard-Man Lawn mower won't start Repair
Yard-Man Lawn mower won't start
If your Yard-Man lawn mower won't start, start with the most common cause first: the spark plug. A cracked insulator, damaged electrode, heavy carbon buildup, or no spark when checked with a spark plug tester can all keep the engine from firing. Next, look at the carburetor, since stale fuel often leaves behind a sticky residue that clogs passages and causes a lawn mower not starting problem. In many cases, cleaning the carburetor with carburetor cleaner helps, but if not, you may need a carburetor repair kit or a complete carburetor replacement. Old or bad gasoline in the carburetor float bowl can cause the same issue, so draining stale fuel is also worth checking. If the fuel system looks good, test the start switch with a multimeter for continuity. On some models, a failed fuel pump can also stop fuel flow, especially if the pulse line, diaphragm, or check valves are faulty. Whether your Yard-Man push mower won't start or your mower has spark but won't start, enter your model number on RepairClinic.com to find the exact replacement part that fits your machine.
01 - Yard-Man 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-Man 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-Man 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-Man Start Switch
To determine if the start switch is defective, use a multimeter to test it for continuity.
Highly Likely
06 - Yard-Man 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-Man lawn mower start even though it has fuel?
My Yard-Man push mower won't start. Should I clean or replace the carburetor?
How do I know if the spark plug is bad on my Yard-Man lawn mower?
Could a bad start switch keep my Yard-Man lawn mower from starting?
How do I find the right Yard-Man lawn mower part for my model?
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