In both cases, adding a stabilizer such as Sta-bil Fuel System Stabilizer ( Amazon link) is a smart idea. ![]() If the old gas is more than half of a tank, it would be best to siphon it out and fill the tank with fresh gasoline. If your mower tank is less than half full of old gas, you might try adding new gas to dilute the impurities. Sometimes, your mower won’t start at all. ![]() The end result is restricted gas flow, which means your mower can start and die shortly thereafter. This residue leaves particles that clog your mower’s internal parts. If the gas in your mower has been sitting inactive for a while, evaporation has most likely created a damaging residue. You know your mower can’t run without gasoline, but the quality of the gas is equally important. When you start the mower, it’ll be pulled into the engine and clean deposits in your carb. Remove the filter, give the hole a spray, then replace the filter. This is typically just behind the air filter. What I Doįor carb maintenance, give a light spray near the air intake hole for your mower’s engine just before you start it up. This could strip the threads enough to distort the seal. When reattaching the bowl, don’t over-tighten the screw. This is where the directional spraying straw is particularly handy. Be sure to clean the screw and hole with the carburetor cleaner as well. ![]() Unscrew the carburetor bowl and give it a once over with the cleaner. You can purchase either product locally, or online. If you need a more precise application, Gumout makes a cleaner ( Amazon link) that will do the trick with its jet spray applicator. The only drawback to this particular cleaner is it does not have a straw for targeted spraying. I give my mower a shot of that every time a mow, right before pulling the cord, and recommend that you do the same. This cleaner uses a solvent formula to breakdown carbon contaminants, leaving your carburetor clean and gum-free. I use the WD-40 Specialist Fast Acting Carb/Throttle Body Parts Cleaner ( Amazon link). This will cost you less than $10 and will last for a season or two. Your dirty carburetor needs a good blowout with an aerosol can of carburetor cleaner. If your carburetor is dirty or the carburetor bowl is clogged, the process above is compromised, and your engine may start up, but it will not run properly and may die shortly after you pull the cord. This combustion supplies a continuous rotation of the crankshaft that is necessary to run the mower’s engine. The carburetor is responsible for mixing gas with just the right amount of oxygen to create combustion. Your engine needs a steady flow of gasoline to run correctly. What’s so important about the carburetor? In both cases, your carburetor is going to need a little TLC. If you live in a northern region, your mower sits all winter … waiting months without any action.Īnd, if you live in a more temperate zone, your mower works hard year-around. When your lawn mower starts then dies, your carburetor is most likely involved somehow. Dirty Carburetor or Clogged Carburetor Bowl Dirty carburetor / clogged carburetor bowlīelow I’ll get into each potential problem, why it can result in a mower that starts then dies, and what you should do to fix it.If your lawn mower starts, runs briefly, then dies these are the four most common reasons that’s happening: Causes for Lawn Mower Starting then Dying Let’s take a look at the four most common reasons behind that false start and how to fix them. ![]() When your mower starts then dies it can feel like you’re alone, but this problem is more common than you might think, and the fix can be an easy one. I’ll share the 4 most common causes to this mower problem and what you need to do to address each. If your lawn mower starts then dies, you want a quick answer about what’s to blame, and what to do to fix it. However, it’s pretty frustrating to be all ready to tackle those tall green blades only to have your mower fire up and then sputter out.
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