Bolens Lawn Mower Won’t Start. It can be easy to freak out when your Bolens lawn mower won’t start. You probably don’t want to end up with a mess of overgrown grass, so immediately jumping to the conclusion that you need a new Bolens lawnmower is probably not the best idea.
There are several steps in our fixing-a-Bolens lawnmower troubleshooting guide that can help you find problems and get it going again for far less than it would cost to buy new equipment.
We recommend going through this troubleshooting list before automatically deciding on a replacement because of how useful it has been for many people already.
Bolens Lawn Mower Won’t Start
Bolens lawn mower won’t start. If you thought the fuel had gone bad, perhaps the float bowl is a culprit. In storage, gasoline can get stagnant and sticky. When the fuel has to flow through a carburetor, this liquid may now become too thick and dense for the choke valve to regulate its flow. That’s why it’s up to you to clean out these deposits before they leave too much gunk hanging around to block fuel from flowing properly.
It is possible that the float bowl of the carburetor contains bad or old fuel. Some of the ingredients in the fuel may evaporate over time, leaving behind a thicker, stickier substance.
Carburetor clogs with sticky fuel, which prevents the engine from starting. The carburetor can be cleaned with a carburetor cleaner if this happens. Clean the carburetor first, and if that doesn’t work, rebuild or replace the entire carburetor.
The carburetor might be clogged. A clogged carburetor is a common problem with lawnmowers that are often caused by people leaving fuel in their mowers for too long.
Over time, some of the ingredients in this fuel may evaporate, leaving behind a thicker, stickier substance. This sticky residue can clog up the carburetor and prevent the engine from starting.
If you think your carburetor is clogged, try cleaning it with carburetor cleaner and see if the issue goes away before assuming that the entire carburetor needs to be rebuilt or replaced altogether.
Failure Of A Spark Plug
Spark plugs should be checked for signs of wear or damage. In the event of a cracked porcelain insulator, the electrode may be damaged or burned away, or heavy carbon buildup may occur.
Misfires can also be caused by defective catalytic converters, so inspect this component as well. Ensure that all wires and leads are installed correctly.
Visually inspect the tops of cylinders for visible damage that could hinder proper spark plug connections.
Defective Flywheel Key
The flywheel key might be broken. Essentially, the flywheel key is the small metal piece that fits into the crankshaft and engages with the flywheel of your lawnmower.
If there’s a sudden stop, like if you hit something hard with your lawnmower, or if your engine were to stall for any other reason – it can sometimes cut or fracture.
This keeps it from potentially causing damage to your engine in case this happens. Other than that, the only real purpose of a flywheel key is to do what its name implies keep that big flywheel in place.
Cause Of Fuel Filter
It’s strange, but the fuel filter might be clogged. Leaving old gas in your gas can will actually disadvantage you more than anyone as it will turn into a thicker substance that can clog up the fuel filter.
Which could get in the way of the engine starting up. Naturally, this should be replaced and cleaned thoroughly with fresh fuel.
Spring Rewind Fault
The recoil spring might be broken. If the starter rope is pulled, then released when starting a mower engine, the recoil spring should cause the rope to recoil onto a pulley so that the engine won’t start.
A broken recoil spring will not allow this to happen and will prevent an engine from starting. You can troubleshoot with a multi-meter to see.
If the recoil starter assembly is getting power properly by research online on how to use one and test the parts that give power in this case or it may be easier just to replace the entire assembly of parts.
Malfunction Of The Recoil Starter
Turning the engine over is accomplished by engaging the crankshaft with the recoil starter assembly. If the recoil start is defective; your vehicle won’t start.
Remove the starter pulley and inspect to determine if it’s working properly. Gently pull the cord so tabs emanating from its hub should grab onto a rotor causing the engine to turn.
Release and free-spool the cord back onto its putty pulley as you would on any reel mower.
If it does not work properly, then simply remove or replace your recoil starter assembly using basic tools that most mechanics have access to in their toolboxes.
Bolens Lawn Mower Won’t Start