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This causes the kill switch to fail to engage. After sitting awhile air will seep in and equalize the pressure. Email. We carry more than 4 million parts from over 175 major brands, so chances are, we've got the part you need. Check the vent hole in your gas cap. A backfire is often caused during rapid deceleration, as the engine tries to bring its timing in line with the lowered throttle. If there is no spark, this indicates that the spark plug is defective and should be replaced. It might look like it … To replace the belt, lower the lift lever to the lowest position. The plate is also connected to a small rod and spring. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. Reply Was this helpful? You should see a strong spark between the tester’s terminals when the engine is cranking. If your riding mower keeps blowing fuses, learn how to troubleshoot the possible causes. Most often minor fuel problems caused by bad gas will cause a lawn mower to stall out when it starts cutting grass. Get shopping advice from experts, friends and the community! Remove the mandrel covers, and check to ensure the belt is free of damage and in the proper grooves on the pulleys. the PTO stops working. Afterfire occurs after the engine has been shut off. I just sent it in to the dealer to have it looked at. One way to test the lawn mower for this condition is to check for a current draw while the engine is turned off. This can often lead to an excess of air in the mix, creating a lean blend. The oil is fine as the mower is only 4 month old. Lawn mower battery keeps dying. Often referred to as vapor lock, the engine can't operate with these heated gases trapped inside the tank. The pressure causes the gas flow to reverse and move out of the carburetor, effectively shutting the engine down. A clogged fuel filter can also cause a mower engine to die. If your Husqvarna mower starts and then shuts off after 5 to 10 minutes or so, the problem is likely fuel related. Thanks again for your help - keep all the suggestions coming. Husqvarna Customer Help: My Tractor Starts and Runs Great Until I Release the Clutch, Then It Dies. Stop the mower engine, raise the height and resume mowing. Start doing it yourself with the confidence that comes with 100+ years of experience. Why? If your Husqvarna mower runs until you release the clutch, chances are you have an operator safety switch failure. The mower will not shut off. To determine if the spark plug is defective, use a spark plug tester. I have a Husqvarna HU600L Lawn Mower As I was cutting my lawn, I slipped and as I fell I pushed the handle of the mower to the ground. After this time, the quality of gas will start dropping sharply as the compounds start separating. Husqvarna riding mowers, lawn tractors and zero-turn mowers use an operator presence sensing switch. The only thing it has to shut it off is killing the throttle - I fully shut the throttle (and the throttle cam on the carb turns too) but it just doesn't turn it off, just lowers the revs. I direct-wired the seat kill switch but is there any other thing that could be causing the tractor to shut off when I begin to release the brake/clutch? How do I keep my Automower® in the best possible condition? This sticky fuel can clog up the carburetor and cause the engine to stall. I mow a lot of grass & my lawn is certainly not a golf course, but was on smooth & level ground when this happened. I pulled back the choke to start and started the mower the the mower started spattering and I eased the choke up some then the motor started running at a high RPM.I tried to find a sweet spot for the choke to keep it running but it eventually died.This happens every time I start it. On the Husqvarna models, “Husqvarna” is printed on the side of the mowers. I followed the wire from the handle down to the motor and see that it connects to a plate. If the mower keeps shutting off when you cut thick areas of grass, make sure the mower height is not set too low. Lawn mower engine surging is a right pain in the Jacksie, it's an engine that runs erratically, revs up and down by itself uncontrollably. A homeowner can usually identify the reason for a smoking lawn mower by gauging the color of the cloud coming around the engine, then fix it accordingly before lasting damage occurs. Replace with fresh, regular unleaded fuel. They were sold in orange/black and yellow/black colors. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. Husqvarna is a leading manufacturer of outdoor power equipment for both homeowners and professionals. This sticky fuel can clog up the carburetor and cause the engine to stall. On lawn mowers, most vapor lock occurs through a dirty fuel tank cap. 1 If you need video help, definitely check out my mower repair video library, it walks you through the process step by step, from examining the blade, to removing and replacing the blade including using a torque wrench to tighten the blade bolt.. The Kohler Engine on My Riding Lawn Mower Will Fire but Not Start. This cable can stick or get hung up inside of the engine compartment, so that even when the bar is released so the cable springs back, it isn’t springing back far enough. After cutting grass for this short amount of time. Husqvarna says this may be due to a clogged fuel filter, restriction in the pick up or an improperly vented fuel cap. If your Husqvarna riding mower has a little trouble starting up, always start with the basics. Inspect the spark plug for signs of wear or damage. But the library includes a ton of other common mower repairs too. Husqvarna YTH2448 model 96015000100. Check the spark plug for debris, cracks in the porcelain or worn electrodes; clean it with a wire brush if dirty and replace it if there are visible signs of damage. Kelly's background also includes childcare, and animal rescue and care. ... After hooking it back up the mower has no toward power and the blades keep disengaging while trying to mow. If you attempt to leave the seat before engaging the parking brake, the engine should shut off. Backfire is a condition described as a loud bang, poof, explosion, etc., while the engine is running or while shutting down. Find out the most common causes and possible fixes for engine backfire and afterfire. Already ordered? If cleaning the carburetor isn’t effective, rebuild or replace the entire carburetor. Hold times are long. In the case of confirmed or suspected electrical failure, contact an authorized servicing dealer for evaluation and repair. All lawn mower fuel will start destabilizing after about 30 days. A parasitic drain may also occur when certain devices that are supposed to shut off–like an electrical relay, for example–remain on after the engine has been turned off. If the fuel cap vent is clogged, air won’t be able to enter the tank and a vacuum or “vapor lock” will occur. Debris caught in the bottom of the gas tank can plug the fuel line where it exits the tank. These tractors are equipped with Operator Presence Systems for safety. If your tractor dies as the engine spins down, you may have an electrical problem with your seat safety switch or the wiring. A clogged carburetor is most commonly caused by leaving fuel in the lawn mower for a long period of time. A clogged fuel filter restricts the flow of fuel to the tractor's carburetor. This sticky fuel can clog up the carburetor and cause the engine to stall. This sudden shutdown can be caused by an overheating engine. Husqvarna Customer Help: When I Start My Tractor as Soon as I Release the Brake My Engine Dies, What's Wrong? This stops the flow of fuel to the carburetor causing the engine to stall. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. Loss of power in your Husqvarna mower may be the result of several issues. Very often, a damaged or worn blade is the root cause of a clogging chute. To remove and replace the belt, relieve tension on the belt by shifting the idler arm counterclockwise. Note: Backfire and afterfire through the carburetor will not harm the engine at all! I have a Toro 6.5HP 22" self propelled lawn mower. Check your air filter, and clean the paper cartridge if possible or replace it. My lawn tractor shut down after minutes running fine.Would start up again an do same thing. The loop wire can remain in the lawn without any problems. In some cases it may only happen under certain conditions, for example only after the mower gets hot, or only when the fuel level gets low. I changed the gas and replaced the spark plug. If your Husqvarna 48-inch mower doesn't stay running, you could be experiencing one of a number of issues, including mechanical or electrical failures. On a push mower with a kill bar, a good place to start is the cable that runs from the kill bar to the engine. To make up for this, the fuel cap uses a small vent to allow air to enter the tank. 4 possible causes and potential solutions . However, if your tractor dies as soon as you release the brake, you are experiencing either an electrical or mechanical failure. Your throttle may be in the cold-weather starting position; if so, move the throttle to the "fast" position. Enter model number to search for the required part specific to your product, Browse our parts categories to select from a variety of parts for your product. If the porcelain insulator is cracked, an electrode is burned away or damaged, or there is heavy carbon buildup at the electrode, replace the spark plug. If your Husqvarna mower starts and then shuts off after 5 to 10 minutes or so, the problem is likely fuel related. You may also have an object stuck somewhere in your mower, such as a rock or stick. ... Shop by Husqvarna Lawn Mower Parts. Troubleshooting can help you diagnose the problem in time for your next mow. A clogged carburetor is most commonly caused by leaving fuel in the lawn mower for a long period of time. Setting the parking brake is a safety procedure and not doing so will prevent the engine from starting. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. How to Get a Homelite Model 330 Chain Saw Running. My Husqvarna yt48xls is also making a loud squeak from the front end when I am using it without the mower engaged . The carburetor might be clogged. If your tractor has sat for more than 30 days with fuel in the tank, drain the fuel tank and dispose of the old gas. 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