Already ordered? The 2nd DAY I used the mower with ONLY 5 HOURS on it, a blade & bolt dropped from the mower. Afterfire occurs after the engine has been shut off. You may also have built-up grass clippings or other debris in your cutting deck or under your mower; a thorough inspection and cleaning will remove the debris. These tractors are equipped with Operator Presence Systems for safety. Although a warm mower usually means that you'll complete the job, there are several environmental and mechanical conditions that might make your lawn mower shut down. Most often minor fuel problems caused by bad gas will cause a lawn mower to stall out when it starts cutting grass. After cutting grass for this short amount of time. To remove and replace the belt, relieve tension on the belt by shifting the idler arm counterclockwise. These are not do-it-yourself jobs for all homeowners, and a failed attempt at fixing the issue could become dangerous or do damage to your mower. Start doing it yourself with the confidence that comes with 100+ years of experience. The mower will not shut off. Lawn mower battery keeps dying. I changed the gas and replaced the spark plug. In the case of confirmed or suspected electrical failure, contact an authorized servicing dealer for evaluation and repair. My lawn tractor engine starts with me seated and with the brake/clutch depressed but when I begin to release the pedal, the engine shuts off. Contact an authorized servicing dealer for evaluation in the case of other issues; these issues aren't do-it-yourself jobs. The pressure causes the gas flow to reverse and move out of the carburetor, effectively shutting the engine down. My Husqvarna yt48xls is also making a loud squeak from the front end when I am using it without the mower engaged . 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. It can be puzzling when a lawn mower starts easily and runs fine for a few hours, only to stop with no warning. I mow a lot of grass & my lawn is certainly not a golf course, but was on smooth & level ground when this happened. If your Husqvarna mower runs until you release the clutch, chances are you have an operator safety switch failure. To determine if the spark plug is defective, use a spark plug tester. Never mind if you have a fuel pump. Disconnect the positive battery cable from the battery. Join Repair Clinic's VIP email list for 10% off, plus other discounts and tips! After this time, the quality of gas will start dropping sharply as the compounds start separating. With a professional background in gardening, landscapes, pests and natural ecosystems, Jasey Kelly has been sharing her knowledge through writing since 2009 and has served as an expert writer in these fields. 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 your tractor has sat for more than 30 days with fuel in the tank, drain the fuel tank and dispose of the old gas. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. The carburetor might be clogged. the PTO stops working. It starts just fine, but when it's time to shut it down, it won't turn off after I release the handle. If your Husqvarna mower starts and then shuts off after 5 to 10 minutes or so, the problem is likely fuel related. The oil is fine as the mower is only 4 month old. Loss of power in your Husqvarna mower may be the result of several issues. Husqvarna Customer Help: When I Start My Tractor as Soon as I Release the Brake My Engine Dies, What's Wrong? To determine if the fuel cap vent is clogged, try slightly loosening the cap and then starting the engine. Get shopping advice from experts, friends and the community! I have a Toro 6.5HP 22" self propelled lawn mower. Find out the most common causes and possible fixes for engine backfire and afterfire. There’s nothing to worry about that. I replaced the clutch assembly but still have the same problem. Very often, a damaged or worn blade is the root cause of a clogging chute. The plate is also connected to a small rod and spring. 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. Debris caught in the bottom of the gas tank can plug the fuel line where it exits the tank. The Kohler Engine on My Riding Lawn Mower Will Fire but Not Start. A clogged carburetor is most commonly caused by leaving fuel in the lawn mower for a long period of time. This stops the flow of fuel to the carburetor causing the engine to stall. Riding mowers and tractors all have safety equipment to safeguard operators, including a switch under the driver's seat that trips the motor if the operator leaves the machine. Shipping all 7 days! Backfire is a condition described as a loud bang, poof, explosion, etc., while the engine is running or while shutting down. If your lawnmower won't start after it's been running for a while, the problem may be easier to fix than you think. This sticky fuel can clog up the carburetor and cause the engine to stall. A clogged fuel filter restricts the flow of fuel to the tractor's carburetor. Remove the mandrel covers, and check to ensure the belt is free of damage and in the proper grooves on the pulleys. Often referred to as vapor lock, the engine can't operate with these heated gases trapped inside the tank. All lawn mower fuel will start destabilizing after about 30 days. I just sent it in to the dealer to have it looked at. As fuel is consumed by the engine, the level in the fuel tank lowers. We've got millions of parts, hundreds of brands, and thousands of step-by-step videos— everything you need to find it, fix it and finish the job right. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. This sticky fuel can clog up the carburetor and cause the engine to stall. This sticky fuel can clog up the carburetor and cause the engine to stall. This causes the kill switch to fail to engage. The correct spark plug replacement is a Champion 795135. On lawn mowers, most vapor lock occurs through a dirty fuel tank cap. YES CHECK PLUG TYPE. A backfire is often caused during rapid deceleration, as the engine tries to bring its timing in line with the lowered throttle. 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.. This raised the mower front end up and the mower shut off. Husqvarna Customer Help: My Tractor Starts and Runs Great Until I Release the Clutch, Then It Dies. Note: Backfire and afterfire through the carburetor will not harm the engine at all! Depending on the size of your lawn, you may want to clean grass from the wheels and chassis, too. If the carburetor is clogged, try cleaning it with carburetor cleaner. Automower® is a low-maintenance mower, but replacing blades on a regular basis is important to ensure a good result. Zero-Turn mowers use an operator safety switch failure the level in the lawn mower turn! As a rock or stick a mower engine, the fuel may evaporate, leaving behind a thicker, substance! 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