Yardman lawn mower won’t start. As you prepare to mow the lawn, you try to start the yardman lawnmower, but nothing happens.
Some lawn mowers fail to start for a variety of reasons, including skipping a step during the starting process.
You could also have a different root cause for the same issue depending on whether you own riding or walking lawnmower.
Yardman lawn mower won’t start
Here are some troubleshooting tips when your lawnmower won’t start what you’re likely to need a replacement for,
and whether or not it would be advisable to get professional assistance.
A spark plug is defective
Check your spark plugs regularly to see if any are showing signs of wear or damage.
Cracked, damaged or build-up of carbon around the porcelain insulator should be rectified by being replaced.
To test whether or not a spark plug is working correctly you could use a spark plug tester to check for a strong spark between its terminals when the engine is cranking. No spark? Then the spark plug needs replacing.
It is possible that the carburetor is clogged. It is usually the result of muck and dirt building up in the carburetor, which can then create problems all the way up the chain.
If you are tired of your lawnmower and it keeps failing to start then there’s a good chance that what you need to do is clean out the carburetor.
Our advice says that this is generally best done with a cleaning agent specifically designed for this
specific purpose because they often carry powerful cleaning agents while at the same time not damaging rubber or metal pieces any more than necessary.
Otherwise, if cleaning the carburetor with an effective cleaner doesn’t solve your problem you may want to try replacing or rebuilding the carburetor instead.
Gasoline that is spoiled or bad
Old, bad fuel or fuel that has been contaminated can clog up your carburetor and make it impossible for your engine to run smoothly.
You might want to try cleaning the carburetor first with a spray cleaner or gas line cleaner at least sometimes it helps deliver smoother performance!.
However, after trying to clean out the carburetor it becomes clear that you need to replace or rebuild it entirely.
The flywheel key is broken
There is a small metal piece that is attached to the crankshaft and engages the flywheel to lock the flywheel into place.
If the lawnmower engine stops suddenly due to hitting a hard object, the locking ring prevents damage to the engine.
If the locking ring is broken, it won’t start. Examine the flywheel locking ring after removing it from the engine to determine if it is broken. In that case, replace it immediately.
The fuel pump is not working correctly
The fuel pump is what makes sure you have gas in your car. Without it, you wouldn’t go anywhere. There are three main components of the fuel pump: 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 which allows for air pressure from inside the crankcase to push against a diaphragm, causing it to contract or expand and effectively move gasoline.
This happens because of how air pressure alternately pressurizes and depressurizes inside this tube when your lawnmower is running.
A tiny valve is known as a check valve prevents gasoline from getting to this tube if it somehow manages to find its way back into your tank.
Replace the fuel filter
There are a lot of things that can cause your lawnmower to stop running, including a clogged fuel filter.
A fuel filter is designed to catch any small particles that may be floating through the engine as it runs and distribute clean fuel throughout the system.
Unfortunately, if this part gets too dirty, it may not be able to do its job properly and then you run into problems.
Thankfully, it’s usually not too hard to find and replace this part which often costs a lot less than purchasing a whole new lawnmower.
The ignition coil is faulty
Spark plugs receive voltage from the ignition coil while the engine is running. This is why a malfunctioning ignition coil may prevent the engine from starting.
First, verify that the functionality of the spark plug is working properly before attempting to replace or repair it.
If you confirm that everything relating to your ignition coil and the spark plug is operating normally.
Inspect an ignition coil tester for any signs of defects in order to determine whether or not your coil needs to be replaced in its entirety.
A coil starter pulley is broken
The recoil starter pulley winds up and stores the starter rope when it’s not being used.
If the recoil pulley is broken or stuck, the starter rope won’t be able to wind back up, which means the engine won’t start if you try to start it again.
The recoil starter pulley on your boat should be replaced immediately if it is damaged.