Lawn Boy Mower Won’t Start. Maintaining a mower can be hard work especially if it’s old and there is no one to help you.
It is always good to be prepared and never know what might go wrong with your mower and what small part or replacement part could rescue your precious time and money.
One great example of such an occasion would be having the right tools on hand particularly spanners, pliers, and wrenches for taking care of those pesky nuts and bolts.
Without them, you might find yourself stuck with an immobile lawnmower which will not only lower your self-esteem but also hamper your ability to do the most basic of jobs like cutting the grass.
Why Lawn Boy Mower Won’t Start
Your Lawn-Boy Mower Won’t Start because of a dirty spark plug inside your lawnmower.
Check to make sure that it is tightly plugged into the engine and hasn’t come loose. If you find dirt or foreign material in the area, dip it into a solution of water and clean alcohol to clean it off. Then reconnect and tighten it properly.
Here is a list of the most common reasons why your lawnmower won’t start and how to fix it.
Some lawn mowers have a choke, which is a mechanism that affects the amount of air and fuel going into the engine.
The choke is meant to be left off at all times during warm weather, so it should be turned off when starting a lawnmower if you live in an area where there hasn’t been any cool weather recently.
Leaving the choke on for too long will cause the engine to stall because there’s not enough air for it to run properly.
You shouldn’t try starting back up for at least two hours when all of the excess fuel has had time to drain out of the motor.
If this happens frequently and you don’t know why it keeps stalling, make sure your switch hasn’t failed and needs to be replaced or cleaned using carburetor spray.
Spark Plugs With Dirt
A clogged or faulty spark plug can be the reason your lawn mower won’t turn on.
A spark is what keeps your lawn mower engine in good shape, and if there isn’t enough of a spark due to a bad plug, you might need to replace it with a new one.
It won’t stay running at all with a bad or dirty plug. Oftentimes, these plugs can be located on the front of your lawnmower and be connected by a black wire.
You can simply remove this wire by loosening it with a socket wrench and cleaning it with some brake cleaner and wire brush.
If you come across some carbon residue while scrubbing that plug clean, then that usually indicates that it needs to be replaced immediately.
Do yourself and any others who use that lawnmower out there a favor and schedule regular tune-ups to help prevent things like this from happening in the future.
Rewind Spring Problem
The rewind spring of your mower may be malfunctioning. As a result, your engine won’t start. Sometimes this results from the rewind spring being damaged or faulty.
If yours is broken, make sure you replace it as soon as possible to avoid further mechanical
problems with your lawnmower such as preventable damage such as rips or tears in your starter rope or even more serious consequences like major engine damage.
Fortunately, rewind springs are individually replaceable and easier to put back into place than you might think.
It’ll likely take a small wrench and a little strength to twist it back into place, but that’s all that’s required.
Defective Ignition Coil
While the engine is running, the ignition coil sends voltage to the spark plug. Defective ignition coils may prevent the engine from starting.
Before you replace the ignition coil, make sure the spark plug is plugged in as the issue could be as simple as that missing piece.
It’s not necessary to replace anything else if the spark plug functions properly and you’ve successfully started your engine again.
Recoil Starter Issue
The recoil starter assembly is what sets the crankshaft into motion. If this part is dysfunctional, the engine won’t be able to start. Remove the assembly and inspect it to determine whether it’s working properly.
When you pull on the starter rope, there are tabs extending from the pulley that is supposed to attach to a hub on the engine, causing it to turn.
These tabs need to retract when you let go of the rope so that it can rewind back onto the pulley after its work has been done.
The starter must also engage with no problems if your car ever stalls out for instance. If any of these conditions cannot be met, then you’ll know that you need a new starter assembly for your car or truck.
Faulty Flywheel Key
One of the most common ways that our lawnmower engine can fail is when the flywheel key breaks. This can happen when we run into something like a rock or tree stump on the lawn.
It’s important because, without it, our crankshaft could get damaged, which means we’ll wind up stranded somewhere with an unrepairable lawnmower engine.
If you do encounter this problem, avoid taking it to someone who fixes small engines because they likely won’t have the tools to actually work on your lawnmower engine in the first place.
Instead, what you need to do is replace your broken flywheel key with one that will fit properly.
It is possible that the carburetor is clogged. Clogged carburetors are usually the result of a lawnmower that has been left with fuel for a long period.
As some of the ingredients evaporate out of the fuel, a thicker substance is left behind that sticks to everything in the carburetor.
Eventually, the sticky substance will form one big glob in your carburetor, preventing your lawnmower from starting. In case this happens to you, clean up/rebuild or replace the carburetor.