![]() ![]() Spark plugs can go bad for a few reasons but are luckily pretty easy to inspect and replace. If the carburetor and fuel aren’t the issue, maybe the problem isn’t with the fuel supply but actually an issue with igniting the fuel. If you haven’t run your lawn mower for an especially long time, the fuel and carburetor should be the first things you check. Adding fuel stabilizer can also help prevent your gas from going bad, but it won’t make it last forever. For example, non-oxygenated gas will last the longest, and premium gas will last longer than regular gas. It’s hard to say exactly how long you can let gas go before it “goes bad” because it really depends on the type of gas you use. Well, you can imagine that if a little gas sits for a couple of years and jams up your carburetor, the same could happen in the gas tank. This problem is pretty easy to identify – take a look at your air filter and see what condition it’s in. Most commonly, they get clogged by oil that has leaked out when tilting a lawn mower incorrectly, or just over time after filtering out all the dust and debris in the air. Air filters can get clogged up for a bunch of reasons. Sort of like carburetor troubles, a clogged air filter won’t let your engine get as much air as it needs to run. Leftover fuel that sits in the carburetor bowl creates a varnish-like buildup that gums everything up. This is especially likely if your mower has sat for a couple of years without running. Usually, this happens because the carburetor is dirty. Starter fluid might be enough to get the engine going initially, but if the carburetor isn’t delivering the right mix of fuel and air, the engine won’t be able to stay alive. Nobody likes to hear that the carburetor might be the issue, but in this case, it is a very common one. Let’s talk about the possible causes a bit more before getting into the fixes. If you’ve managed to get the engine turned over with the help of some starter fluid, you might not need to go much further to have it running smoothly. Most of the reasons why a small engine starts with starting fluid then dies are related to the fuel supply. Possible Causes of a Mower That Dies After Using Starter Fluid ![]() It can get a little bit confusing when trying to figure out what problem you might be having, so I’ll talk about these issues in more detail below. The main reasons for why your lawn mower starts with starter fluid then dies are: issues with the carburetor, a clogged air filter, bad or old gas, spark plugs that aren’t firing correctly, and an improper oil level. 3.5 Adjust the Oil Level Why Does My Mower Start With Starter Fluid Then Die? (The Short Answer) ![]()
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