Here is what I did so far. To test for a clog, simply blow through the lines, observing any blockages. Husqvarna bt 150 bogs down and stalls after about 10 MINS. Let’s deal with the obvious first and get it out of the way. plastic bag. I know, I know… it seems ridiculous. If your grass trimmer only runs in choke, there are a few solutions that may fix the problem and let … 3. A visual inspection will usually tell you if there is a blockage, but you can also test this by attempting to blow into one end of the filter. Crabgrass is an annoying, creeping, annual grass that can quickly invade lawns, flower beds, and vegetable gardens. Once off, you should remove the damaged or clogged filter, and simply replace it with a new one, then close the cover. of running. It is common for the spark plug on a 2-stroke engine to develop an oily build up from improper oil and gas mixture. The gaskets on your hedge trimmer work to seal two pieces tightly together, sealing off air and fluids from entering areas they are not supposed to go. This site is a participant in affiliate programs such as Amazon Associates and earns from qualifying purchases. It’s generally best to purchase a carburetor rebuild kit prior to starting. This element is located inside the tank on the intake hose. Check the manual provided by your owner for more specific repair information related to your model. The fuel filter prevents debris from entering the carburetor and engine, which can damage them. I’ve had great success with SeaFoam motor treatment (link to Amazon). We were unable to add your email to our mailing list. Blame it on the heat! Why does my weed eater die when giving it gas? Get shopping advice from experts, friends and the community! Also known as a weed wacker or eater, a strimmer or a string trimmer and edger, your machine runs on manual controls that may occasionally need a troubleshoot. Separate the engine from the cowling that holds drive shaft, and there the coil will be. The spark arrestor is a small screen that prevents the engine from emitting sparks. Trimmer: Engine Will Idle But Dies At Full Throttle. As a rule, I strongly recommend using ethanol-free gas in your weed eater. It’s ethanol-free, has a high octane rating, and has a much longer shelf life than a homemade fuel mix. When the fuel has passed through the fuel filter, it enters the carburetor where it’s mixed with air. These diaphragms are easy to replace yourself. The carburetor of your Husqvarna weed eater has the most important role to play. I just took covers off and looked around again, blew some dirt out of places that would not likely make any difference (it was all pretty clean around the carb and throttle linkages). I have a husqvarna 128LD weed eater that has about 50 hrs on it, it runs fine at idle but won't run at full power. If your trimmer engine idles, but stalls on throttle, check the following parts: the gasket, primer bulb, fuel filter, air filter, fuel vent, fuel line, and carburetor. Next, check for any adjustment screws that the carburetor may have. It takes the gasoline from the gas tank and supplies it to the combustion chambers. Unscrew them to assess the condition of the metering diaphragm. It may run a little rough at first, but it should start at these settings. A fuel filter can get clogged with impurities to a point that it allows a small amount of fuel through (enough for starting and even idling) but won’t let it through at a rate sufficient to rev up. If your air filter is clogged, it will literally suffocate the engine when you rev the throttle. Let the air filter dry fully. If your hedge trimmer engine idles, but stops at full throttle, you will need to check the following parts: the fuel lines, gasket, carb kit, carburetor, and spark plug. If your chainsaw stalls instead of producing the reassuringly high-pitched sound of a healthy engine when you press the throttle … Took the carb out and cleaned it, same with the air filter and exhaust port. Note: this is a general repair guide. To fix the problem, just loosen the valve. If the flaps of the diaphragm are bent or worn out, you can replace these easily. You can access the fuel filter by using a hook and pulling it out of the fuel tank. Commercial pre-mixed fuel also has the correct levels of fuel stabilizers and assures a precise gas-to-oil ratio for optimal small engine performance. Bought last fall, used briefly, drained gas and put away for the winter. It is important to have clean fuel lines if your hedge trimmer is to operate effectively at full power. When you have the engine running at its best, the problem will be solved (note: this does require some experience and may take a few times to get it right). Let’s get started with the troubleshooting process so that you can get back to your yard work. Same problem. Cracked or clogged fuel lines will deprive the carburetor and the engine of fuel, causing it to die when the trimmer reaches full power. Page 20 … Paul has a two-acre yard on red clay soil in Southeast Texas. In addition to wiping the trimmer, a good rule of thumb is to check each of these parts at the end of the season: Checking these parts at the end of the season ensures you can jump right into lawncare come springtime! On the opposite side of the carburetor, there is another set of screws. Husqvarna's new battery-powered chainsaws, T540i XP® and 540i XP® deliver power on par with a professional 40cc petrol chainsaws, as well as unparalleled convenience, precision and durability. Note: this is a general repair guide. It will idle just fine, nice and smooth, but when you give it gas it dies out....you can play with the gas a little...example would be to give it slow gas and let it rev up slow, but it eventually dies out. It ensures air and fuel work together to start a combustion engine. This is a relatively common symptom and our repair guide can help you fix it. If you see anything unusual coming out, or hear a blockage, your best course of action would be to replace the line. One should be marked L (low) and one marked H (high). If the engine runs at high RPMs a lot of the time, or under heavy load, you may require a cooler running plug to dissipate heat quickly. One should be marked L (low) and one marked H (high). Maintaining the weed eater will ensure it lasts for years to come and won’t break down when you need it most—or in the middle of working. Cracked or clogged fuel lines will deprive the carburetor and the engine of fuel, causing it to die when the trimmer reaches full power. Page 24 Fuel system Lift off the lock preventing unintentional full throttle (A). It’s also possible that the type or mixture of fuel you are using has caused an issue. Sometimes the adjustment screws are improperly adjusted and therefore the engine is not getting enough air. it has about 10 hours of run time. Here is what is happening. Be careful doing so, as the plugs can be fragile. Use Husqvarna air filter oil. Click here for Paul’s author page. We tend to focus so much on the fuel and air coming in that we forget the possibility that the problem may be with the air getting out. Hedge Trimmer: Engine Will Idle But Dies At Full Throttle. Re: Husqvarna 460 dies if throttle is opened Today I took some time with the 460 Rancher. The important thing to remember is to make sure the carb isn’t clogged before proceeding into the next, more technical steps. The concern is with the gaskets. always drain gas at the end of fall. Sometimes the trimmer stalls when you give the gas because fuel valve clogged. Common solutions for: Husqvarna String trimmer starts then stalls. Wire brush, reinstall. En … To inspect the fuel lines for cracks or clogs, you will need to gently remove the lines from both the carburetor and the tank. Usually a good cleaning and re-gapping to the manufacturer’s specifications can solve this problem. Next, remove the spark plug and check its condition. If the weed eater starts up without issue and stays on when you rev the throttle, you have fixed the problem. To test for a clog, simply blow through the lines, observing any blockages. I ran across this YouTube video on clogged exhaust problems last fall when a friend and I were working on his weed eater and couldn’t find the issue. Once you are done, reassemble the carburetor and test your weed eater. Your best bet is to opt for a pre-mixed fuel like Husqvarna XP (link to Amazon). It is also one of the most frustrating parts of a small engine and a big reason that I’ve been seriously considering the benefits of moving to electric yard tools. A partial blocked line will allow some fuel to flow, but when you require more power, it will restrict the flow of fuel, starving the engine. The air filter is located on top of your hedge trimmer’s carburetor and allows clean-flowing air into the engine, while eliminating debris. Be sure you drain any fuel from the tank to prevent leaking in later steps! Most manufacturers allow for up to 10% ethanol but it’s not worth the risk. If you have been using a less-optimal fuel, it’s worth checking your fuel filter. Receive money-saving advice and special discounts! You should follow the path that the fuel travels to identify the issue. My Chainsaw Runs Then Stalls. only use it a few time a year. If I set the carburetor high speed jet rich it will run continuously, but if I lean it out to bring the engine up to full power it quits, just like it ran out of gas it will only run for about 5 - 10 sec. Sometimes a weed eater will start, and even idle just fine, but when you give it gas, it dies. Examples provided of tested products are actual products owned, tested, and used regularly by the author. Trimmer would die at full throttle. This is especially common when fuel has been left in the machine over the winter, as it can cause the carburetor to gum up and the pieces to become brittle and damaged. They are pretty cheap. Throttling always makes it bog down and stop. It’s worth checking this and cleaning the filter (or replacing it since they are so inexpensive). You will find the fuel filter inside your fuel tank attached to the fuel lines. The repair and symptom guide will help you better identify the part needed to be replaced and how. Unlike corporate website companies, the authors on this website regularly use many of the tips and recommendations provided in their own garden and lawncare. Now, the obvious issue that you need to check before we get technical is whether or not your carburetor is clogged. It is such a prolific nuisance that there are multiple sprays and chemical control... 5 Tips for Creating Beautiful, Low-Maintenance Flower Beds. Disconnect throttle cable Remove the really long screw that tightens the collar that holds the drive shaft housing. As your trimmer ages, the air filter can become clogged, which will starve your engine of the air it requires. You can use a damp towel to get any excess grass or debris off. You will also want to locate both idle screws on the carburetor. This is a relatively common symptom and our repair guide can help you fix it. At this point you will want to look for any obstructions in the way that could block air flow, and ultimately starve the engine of oxygen. Husqvarna String trimmer starts then stalls. If you have been using a less-optimal fuel, it’s worth checking your fuel … You will also want to locate both idle screws on the carburetor. Remember you can also find user manuals on the manufacturer’s website in many cases! Then, start by turning the L screw clockwise to add more fuel and set the idle. Thriving Yard is an affiliate for companies including Amazon Associates and earn a commission on qualifying purchases. To see whether this is the case, check the actual fuel in the tank (and compare it to the reading on the gauge for accuracy while you’re at it). The most common causes of a weed eater dying when throttled are fuel issues, insufficient air intake, or problems with the exhaust. If this doesn’t remedy your problem, be sure to check out the other side of the carburetor, which we will cover next. Clean it or replace it depending on the type of filter it is. He takes a practical approach to yard improvement and enjoys putting best practices and “golden rules of lawn care” to the test. hey, I have a fairly new husqvarna, just a 240, but i take good care of her and always keep chains sharp. You can find carburetor repair kits (link to Amazon) that include diaphragms in hardware stores or dealer service centers as well as online marketplaces. Back to my last post, I would rather clean the screen and replace the plug every year or two than replace the entire weed trimmer or chain saw. Remove the screen, hold it in a pair of hemostats and hold the screen in front of a propane torch until it glows red, burning off the oil deposits. On the other hand, if your trimmer starts up, but the engine sounds erratic, you should take apart the carburetor to investigate further. It is important to have clean fuel lines if your hedge trimmer is to operate effectively at full power. Adjusting these settings to lean out the fuel flow will solve the problem. If you want to see this visually, Home Garage has an excellent walk-through video on YouTube that takes you through a lot of what we are going to cover: Taking apart a carburetor on a weed eater can feel a little intimidating but it’s actually really simple; you will only need a screwdriver. Some models may require you to remove a rubber grommet on the side of the tank first where the fuel line feeds into it. One reason why one of these trimmers may die at full throttle is that too much oil is in the gas, which causes poor combustion. Let’s look at these areas of your carburetor: These are the most common culprits of a carburetor when a weed eater starts but stalls when throttling. You will find the carburetor underneath the air filter, and once you have located it you can remove the air cleaner cap. First, make sure you have enough gas in the tank. If I could give it 0 stars I would. Sometimes the adjustment screws are improperly adjusted and therefore the engine is not getting enough air. Remove the throttle lever (D). At this point you will want to look for any obstructions in the way that could block air flow, and ultimately starve the engine of oxygen. Once the engine is running again, allow it to idle for about a minute. Refer to To disconnect and connect the throttle Refer to Servicing tools on page 11 . Just search for the make and model you need. If this is the case, you may need to clean out a clogged or gummed up carburetor or replace some of the smaller parts by purchasing a carb kit. If I leave the choke closed it will run at full throttle, but very lean, so I am pretty sure it is a fuel problem. Hi all, I have a Husqvarna 128LD string trimmer, I bought new about 5 years ago. Take a few minutes to watch this: Regular maintenance is important for any piece of lawn care equipment. This happens every time this hedge trimmer is cold. I've tried changing the fuel for carefully measured fresh mix. Sometimes we forget to do this in the midst of working. The fuel line is connected to the carburettor, which can be found near the throttle at the rear of your chainsaw. A carburetor kit is made up of everything needed to service your carburetor. Disconnect the throttle cable from the carburetor. The spark plug’s job is to ignite the air and fuel mixture in the combustion chamber under any condition. Inside one side of the carburetor, there is a diaphragm--a small plastic piece with small flaps--which is what we will focus on during this part of the troubleshooting process. Over time, the spark arrestor can become clogged with soot. This part helps regulate engine speed and should be the consistency of a cotton T-shirt. Next, check for any adjustment screws that the carburetor may have. See the “Carburetor Kit” section for instructions here. Know this: Bad gas will sometimes allow a weed eater to start but once you try to rev the throttle, it dies. last year it started to bog down after it was warm. Amazon has put together some great Home Holiday Guide Deals - save money and get your holiday shopping done! Turn both screws in to shut off fuel then turn them the opposite direction 2 turns and start the engine. Check the air filter to ensure it is not plugged with sawdust or any other material. And those primer bulbs tend to dry-rot and crack over time so make sure it’s not sucking in air when you depress it. The air filter is clean and afaik there is no fuel filter to check. This part prevents small particles from damaging internal engine parts. I prime it, start it with choke and let it idle, idles fine, hit the gas past 1/3 throttle it dies like it's fuel starved. To inspect the filter, first remove the cover. This will prevent rust and issues with buildup. I've been having an issue when I throttle with the saw running pretty sluggish and not wanting to throttle like it should be. Features of the trimmer. It doesn’t last forever like people think it does. Video: Trimmer Does Not Accelerate At Full Throttle. Thriving Yard is a privately owned website. You can find the specifications for the diaphragm repair kit in the user manual. Fired it up this spring and it ran great for 4 minutes and then stopped. It starts fine and responds smoothly to the throttle but approaching full throttle it cuts out. However, since your weed eater is starting and only dies when giving it gas, that does help us to slim down the potential issues a little. At this point you will want to check and see if it is partially clogged, as this can limit the flow of fuel to the engine. This is one of those overlooked areas that make you slap your forehead when you think of it. Carburetor Metering Diaphragm - 'HOW IT WORKS' - 2-Stroke Carburetor, link to How to Keep Crabgrass Out of Flower Beds, link to 5 Tips for Creating Beautiful, Low-Maintenance Flower Beds, Gas Weed Eater Won’t Start: Causes and Steps to Troubleshoot, using ethanol-free gas in your weed eater, Ethanol can really mess up a small engine, much longer shelf life than a homemade fuel mix, make sure your two-stroke oil hasn’t gone bad, the benefits of moving to electric yard tools. Hi, I have a Husqvarna 223L trimmer that will idle, but dies when I try to make it go faster. Remove the catch (B) for the twistable handle and its spring (C). Lush, colorful flower beds increase curb appeal while attracting bees, butterflies, and hummingbirds. Also, inspect the … And if you do mix your own, make sure your two-stroke oil hasn’t gone bad. When a weed eater starts okay but dies when throttled, it often indicates that there is restricted fuel flow. A carburetor is a component in gasoline engines. Pull out the drive shaft housing. Note that if your weed eater isn’t starting at all, that could be a different set of issues so be sure to read Gas Weed Eater Won’t Start: Causes and Steps to Troubleshoot. If the filter is clogged, it will need to be replaced, and this should allow your trimmer to run properly at full power. Ethanol can really mess up a small engine. If your hedge trimmer engine idles, but stops at full throttle, you will need to check the following parts: the fuel lines, gasket, carb kit, carburetor, and spark plug. To check the plug for damage/corrosion, first remove the wire and connecting harness from the spark plug. A faulty spark plug may not allow your hedge trimmer to run properly at full power. Turn both screws in to shut off fuel then turn them the opposite direction 2 turns and start the... A fouled or poorly adjusted carburetor can cause your hedge trimmer’s engine to idle, but die when power is increased. Product recommendations not personally owned are based on the author’s knowledge of the company, product, reliability, and reputation. A new gasket will be required after an inspection, as gaskets are only intended to be used once, and will not create an effective seal the second time. Started right up again, and would idle fine, but stop dead after 5 or 10 seconds at full speed. 01 - Spark Arrestor. Just leave the hedge trimmer on idle for a 5 minutes until it warms up to clear. Weed eater stalls when given throttle. I recently replaced fuel line and filter (Echo 90097 kit) and still, no better. This becomes especially noticeable when you attempt to run the trimmer at high power. Details: Husqvarna bt 150 blower only 4 years old. ... Clogged fuel filter does not pass fuel into the cylinder, and the engine stalls at full throttle due to an elementary lack of gasoline. 4. I've got a two stroke strimmer (new last summer). A carb kit will not be the direct cause of this symptom, but a new carb kit is a great way to restore your carburetor to new condition. Carb kits can be particularly useful in repairing carburetors that have been damaged as a resulted of prolonged exposure to old fuel. Simply place the diaphragm flat in the small recess of the carburetor and reassemble the device with the screws you took out earlier. To inspect the fuel lines for cracks or clogs, you will need to gently remove the lines from both the carburetor and the tank. So check this. Fixing an Echo trimmer that starts but dies. You will find the carburetor underneath the air filter, and once you have located it you can remove the air cleaner cap. Things to look for are tears and rips, or any indications of leaks. Depending on your model, it’s usually just a matter of turning a plastic knob or unscrewing a single screw to remove the air filter cover and gain access. The cover is sometimes held on by a tab that you can simply pop open, but you may need a screwdriver to remove some attaching screws. Also if I start it with the throttle full open it will run full speed for about 10 seconds then slow down. If you see anything unusual coming out, or hear a blockage, your best course of action would be to replace the line. My ECHO SRM-225 starts on cold setting but dies out soon after, sometimes one to three minutes, sometimes just a few seconds. Next, you will want to check the condition of the gasket. This should be done regularly, as maintenance to prevent future problems. A fouled or poorly adjusted carburetor can cause your hedge trimmer’s engine to idle, but die when power is increased. This video from The Repair Specialist is a great illustration of the function of the metering diaphragm: If you find the metering diaphragm is worn out--or even worn through entirely--it will need to be replaced.
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