lawn mower backfires then dies

Causes related to low fuel pressure include failing fuel pumps and old fuel filters. The most common reason a lawn mower starts and then dies, is because the carburetor is dirty. If you have tested all of the methods I’ve shared for fixing your lawn mower that starts and then dies, hopefully your problem is solved. Take care to avoid close proximity to a backfire and the motor until you've determined the cause and fixed the problem. It's unusable until the flywheel is repaired. Sorry, your blog cannot share posts by email. Look for gaps and holes in the metal of the engine and carburetor. Be careful not to over-tighten on installation. Tips for Starting a Lawn Mower with Old Gas. Backfire in engines is caused by simple chemical malfunctions that can be easily rectified. If necessary, use a spark plug gauge to adjust the gap by gently bending the curved electrode. The following are other issues that could be keeping your mower from running properly. Not enough oil is another (and more serious) problem, and you would not want to inadvertently trade one issue for another. This can be fixed by adjusting the carburetor for a richer mixture – consult your owners’ manual or have a professional adjust it. He is a certified Master Naturalist, regularly monitors stream water quality and is the editor of, a site exploring the Ozarks outdoors. I'd change the spark plug first. This is actually an easy fix. Let’s take a look at the four most common reasons behind that false start and how to fix them. Why Does My Mower Stop Running After 20 Minutes? Other possible causes include: Stale/Dirty Gas. Joined Jul 18, 2013 Threads 1 Messages 10. In both cases, your carburetor is going to need a little TLC. Backfiring might occur right after your lawnmower engine shuts down. John Deere: Product Maulas: Troubleshooting, Jack’s Small Engines: Backfires on Full Throttle, My Kawasaki Mower Engine Backfires When Starting, What to Do If a Yard-Man Self-Propelled Lawnmower Won't Start. It will start right back up and do the same thing again. Engine is a Kohler Courage 19, SV590S. Thread starter Limfe; Start date Jul 18, 2013; 1; 2; 3; Next. I think YouTube is a great resource. Poor spark also results in a mower that runs unreliably. Clean your air filter regularly (replace it annually). Many mowers have safeguards in place to allow inexpensive items, such as flywheels, to break when the blade hits a large obstruction; these parts basically sacrifice themselves to save more expensive ones, such as the crankshaft. A wire brush and appropriate cleaner will do the trick if the plug is just dirty. Engine backfires but won't start. I have tips for winterizing your mower, and a spring maintenance checklist that you can check out if you’d like to learn more. When you notice backfiring occurring as you try to start the mower, take it in for professional repair before trying to start it again. colt45. Sometimes, your mower won’t start at all. This will tell you if your valves are leaking and which one is the culprit. You also have the option to opt-out of these cookies. Lawnmowers shouldn't backfire when you're trying to start them. What Causes a Riding Mower to Sputter & Die? The simple fix for this is just to lower the engine speed a bit more gradually. If your mower isn’t covered by warranty, find a local small-engine repair shop that has good reviews. How to Tell When it Is Time to Change the Spark Plug in a Lawnmower, My Mower Engine Doesn't Shut Off Immediately. It’s more expensive than regular gas mixed with Sta-bil, but a couple of larger cans will get my Honda self-propelled mower (this one from Home Depot if you’re curious) through the mowing season up here in New England, and I like the peace of mind that comes with knowing my mower and snow blower always start on the first pull, and I don’t have to worry about bad gas giving me problems when I’m ready to mow or need to clear the driveway. Low pressure is the imbalance of the air-to-fuel ratio where there is too much air in the combustion chamber. Check the timing of the motor. We use cookies to give you the best possible experience on our website. Zero Turn vs Lawn Tractor for Hills: Which is Better & Why? If your spark plugs are not too heavily coated with build-up, you can try cleaning them.

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