Echo Weed Eater Won't StartI have tried spraying the carb / intake area with brake cleaner. REMEMBER ONE THING IF THE CYLINDER IS SCORED OR DAMAGED IT WILL KEEP THE ENGINE FROM STARTING THE BEST WAY TO INSPECT IT IS TO REMOVE THE MUFFLER GOOD LUCK. Echo weed eater will not run full throttle. SHOP FOR PARTS Troubleshooting Common Problems String trimmer won't start. Below is the troubleshooting process to get your Echo weed eater to run at full throttle. A clogged carburetor is most commonly caused by leaving fuel in the string trimmer for a. String trimmer won't start. I removed the muffler from the engine and started the trimmer. This will work if you can start your weed eater, but it will shut off. Fuel issues The first thing you should think about when your weed eater won’t start is a possibility that you are running out of gas. String trimmer starts then stalls. Common reasons an ECHO weed eater won't start: Check out the DynaTrap Mosquito & Flying Insect Trap - Kills Mosquitoes, Flies, Wasps, Gnats, & Other Flying Insects - Protects up to 1/2 Acre (link to Amazon). Having trouble starting my Echo SRM-210 string trimmer. I didn't really test much with a new plug more than trying to get it to start. I put in new fuel (50:1 mix) and replaced the plug. Remove spark plug and try to move engine manually. Since it happens very often, you always need to have a prepared mixture of fresh fuel and 2-cycle oil (with the correct ratio of 40:1) in your garage for situations like this one. At some point it just stopped starting. Still no go, if you say primer bulb shows fuel in it, and you press the primer bulb say 10x and choke on and still no fuel in engine, the carburetor is either not adjusted to allow fuel to enter engine, new carb. Reassemble the starter cover and try starting the engine again. Weed Eater Won t Start: Causes Of A Stalling Weed Eater The engine of a weed eater is made up of several parts. Easy fix - YouTube 0:00 / 6:11 Garage sale Echo trimmer will not start. If the trimmer doesn't start within five pulls, repeat the starting procedure from the beginning. If your Echo string trimmer is suffering from a clogged carburetor, try using a spray or soak it with carburetor cleaner and then turning on the engine again. Pressing the primer a few times before starting will deliver the fuel. Similarly, if the fuel in the tank has gone stale, it can cause the engine to run poorly or even fail to start. I have a echo SRM-210 string trimmer that won't start. Be certain that you use the correct rated octane gas for your Echo string trimmer and use fresh gasoline. If your Echo weed eater doesn’t start, it could be due to overheating. This sticky fuel can clog up the carburetor and cause the engine to stall. G-1AK GT-1000 GT-1100/SERIAL:. Common Reasons Why Weed Eater Wont Start: Issues and How to Solve them If your weed eater isn’t starting it could be: Gasoline problem Dirty air filter Faulty. Plug the end of the tester with the metal probe into the boot. The starter rope and recoil spring on your Echo string trimmer may wear out over time and prevent the engine from starting. 70K views 2 years ago This ECHO SRM-225 GT-225 wont start. it shows I am getting some spark but it's weak, compared to my Echo PAS-230 Weed Trimmer with same spark tester. Echo SRM 225 String Trimmer Won't Start - Flooded Know How Now 70. 9K subscribers 22K views 9 months ago Echo SRM Weed Eater keeps flooding & won't. Poor Quality Fuel - If you're using low-quality fuel, it can cause your weed eater to not start. A weed eater, also known as a string trimmer, is a gardening tool that uses a flexible monofilament line to. Now it won't start, hot or cold. Shop by Popular Echo String Trimmer Models. I have put fuel directly into the cylinder … read more. Poor Quality Fuel Fouled Spark Plug Clogged Fuel Filter. Clogged Primer Bulb and Line The primer is a small plastic bulb with an attached line that feeds the string trimmer fuel. Remove the starter assembly and inspect it to determine if it is working properly. Hold the start trigger down until the engine is running smoothly. It will start up and run fine for about 30 minutes, and then it will die on you. I took the following steps: *Emptied the gas tank and put clean fuel in *Cleaned the Carb with Carb Cleaning Fluid *Replaced the air filter and. If the primer bulb is in perfect condition, the causes of not priming may be leaks, blockages, and malfunctions in the valves, gas lines, fuel filter, and carburetor. Find the screw to adjust the idle speed. The Video!!!!! All the previous steps are shown in this video. I have replaced the ignition coil and sparkplug. The starter rope and recoil spring on your Echo string trimmer may wear out over time and prevent the engine from starting. Starter rope pulls smooth when the spark plug is removed, but is jerky and hard to move when plug is in. If the porcelain insulator is cracked, an electrode is burned. The 260 service manual gives compression as 115 PSI (standard). Remove the spark plug with a spark plug wrench*. GT-160 GT-2000/TYPE 1E/SERIAL:. Ground the side of the plug against a metal part of the engine. A Quick and Easy Fix GreenThumbEngines 2. A problem with some or a combination of these parts could cause the weed eater to cut off after turning it on. Most likely it will not fix a weed eater that doesn't start up at all. Starter recoil is just jammed or actually broken. There are a few reasons why your weed eater may not be starting. If your Echo weed eater doesn't start, it could be due to overheating. The ECHO SRM-266 weed Wacker has a strong engine and the handle grips let the user operate it in comfort. 10 possible causes and potential solutions. I removed the cover and checked the gap between coil and flywheel magnet. How to Fix an Echo Weed Eater That Won't Start (SRM-225) 50,711 views Nov 23, 2020 459 Dislike May Mow 238 subscribers So you've checked the spark plug, cleaned the carb and even checked your. A dead battery can prevent your ECHO electric weed eater from starting as well. had the exact same problem: idling like crap then when I pulled accelerator lever it would conk out almost every time. Once the engine is running, slide the choke lever down to the open position. If the recoil starter assembly is defective, the engine won't start. When you find your ECHO string trimmer won’t start, the best thing to do is to first rule out the air filter, fuel filter, and spark plug as being part of the problem. Check for a plugged or restricted exhaust ports, dirty spark arrestor screen. An empty fuel tank or stale fuel can cause your Echo string trimmer to fail to start or run poorly. I have a GT 225 echo string trimmer That won’t start I’ve replaced the carburetor, the spark plug and flushed the fuel and ran some premixed 50:1 from lowes. How to Fix an Echo Weed Eater That Won't Start (SRM-225) 50,711 views Nov 23, 2020 459 Dislike May Mow 238 subscribers So you've checked the spark plug, cleaned the carb and even checked your. There are a few reasons why your weed eater may not be starting. 70K views 2 years ago This ECHO SRM-225 GT-225 wont start. I guess I'll drop it off at the small engine repair place. @rcurren01, rcurren , Echo SRM-225 Trimmer, You can try with fuel cap off in case the caps vent is plugged not allowing fuel flow and or replace the filer in the tank if you have not already done so. When you find your ECHO string trimmer won't start, the best thing to do is to first rule out the air filter, fuel filter, and spark plug as being part of the problem. The issue may have something to do with the carburetor. If your gas weed eater is not starting, the most common causes are: Fuel-related issues Malfunctioning spark plug Dirty carburetor Air filter blockage Recoil starter Flooded engine Depending on what is preventing your weed eater from working correctly, troubleshooting is a fairly simple process. Could there be too much compression? Feels like that's the issue. The ECHO SRM-266 weed Wacker has a strong engine and the handle grips let the user operate it in comfort. Echo (pas 225) trimmer (new carb and spark plug) not starting It had been working now about a few uses since replacing the carb and I checked the exhaust screen and cleaned it and I noticed the plug seemed wet. Replace the insulated boot back on the terminal. Echo Weed Eater Is Not Starting: Reason & Fixes It mainly happens due to the following 4 reasons: Bad fuel. To solve this problem, replace the new spark plug once a year. Check it by opening the cap and simply removing the air filter with your hand. I Ifixdit Well-Known Member Joined Oct 23, 2010 Threads 3 Messages 243. Engine is seized. I took the following steps: *Emptied the gas tank and put clean fuel in *Cleaned the Carb with Carb Cleaning Fluid *Replaced the air filter and spark plug *Replaced the fuel line system *Finally replaced the carb It still won't start. 00 bucks on a new carburetor and this trimmer still won't start any suggestions would be. This can cause several problems, including the engine not starting when you pull the string. Echo String trimmer won't start 01 - Echo String Trimmer Spark Plug Inspect the spark plug for signs of wear or damage. When you pull the starter rope, tabs extending from the pulley and cam should grab the hub on the engine, causing the engine to turn. An empty fuel tank or stale fuel can cause your Echo string trimmer to fail to start or run poorly. If it doesn't move engine is seized. Will show you step by step easy fix. Many components inside an Echo weed eater can become overheated after extended use or if left in direct sunlight for too long. String trimmer won't start. Learn how to diagnose an Echo SRM 225 that won't start possibly due to bad crank seals or leaky exhaust gaskets without special tools. pulled the spark plug and was black. Do a quick check to satisfy yourself. Reasons behind echo weed eater do not get started Sometimes a trimmer would not get a start. Since the engine turns off shortly after starting your weed eater, the idle speed may just be too slow. It might be able to be freed with 2. The ECHO SRM-266 weed Wacker has a strong engine and the handle grips let the user operate it in comfort. You should see a strong spark between. If your gas weed eater is not starting, the most common causes are: Fuel-related issues Malfunctioning spark plug Dirty carburetor Air filter blockage Recoil starter Flooded. faulty, fuel lines not hooked up properly/pinched. A Quick and Easy Fix - YouTube 0:00 / 4:50 Why your Weed Eater Won't Stay Running. Common Reasons Why Weed Eater Wont Start: Issues and How to Solve them If your weed eater isn't starting it could be: Gasoline problem Dirty air filter Faulty spark plug Faulty Ignition coil Malfunctioning carburetor Dirty spark arrestor Flooded Engine Electrical or battery malfunctions 1) Gasoline Related Problems. If the battery is bad, it will not provide sufficient voltage to the starter motor to turn the engine over. To check if this is why your ECHO weed eater won't start, take out the battery and connect another one to it. If the compression is in the neighborhood of the recommended range of 120 psi it should fire on carb/choke cleaner. Give the trimmer a couple pulls, while watching the testers spark chamber. Follow all safety precautions in your operator’s manual to avoid injury while working on your leaf blower. Many components inside an Echo weed eater can become overheated after extended use or if. Clogged fuel filter Faulty spark plug Clogged carburetor Before we. Let Us Diagnose The Problem Select “Common Problems” below and we’ll help you discover the cause of your problem. Easy fix - YouTube 0:00 / 6:11 Garage sale Echo trimmer will not start. An ECHO leaf blower will not start when the air filter is plugged, the spark plug is bad, the carburetor is dirty, old fuel gummed up the fuel system, an incorrect fuel mix is used, the recoil starter is bad, or the engine is flooded. When a primer bulb isn’t priming, it could be because it’s cracked, broken, or damaged and needs replacing. All ECHO yard trimmer engines are certified with #1 Home Improvement Retailer Store Finder Truck & Tool Rental For the Pro Gift Cards Credit Services Track Order Track Order Help The Home Depot Logo To See Inventory. It offers a revolutionary combination of low weight, professional features and high horsepower. Easy fix - YouTube 0:00 / 6:11 Garage sale Echo trimmer will not start. Many components inside an Echo weed eater can become overheated after extended use or if left in direct sunlight for too long. Common Reasons Why Weed Eater Wont Start: Issues and How to Solve them If your weed eater isn’t starting it could be: Gasoline problem Dirty air filter Faulty spark plug Faulty Ignition coil Malfunctioning carburetor Dirty spark arrestor Flooded Engine Electrical or battery malfunctions 1) Gasoline Related Problems. All ECHO yard trimmer engines are certified with #1 Home Improvement Retailer Store Finder Truck & Tool Rental For the Pro Gift Cards Credit Services Track Order Track Order Help The Home Depot Logo To See Inventory. Echo String trimmer won't start 01 - Echo String Trimmer Spark Plug Inspect the spark plug for signs of wear or damage. Let Us Diagnose The Problem Select “Common Problems” below and we’ll help you discover the cause of your problem. Make sure the gas tank on the trimmer is full before assuming it's not working properly. There are a few reasons why your weed eater may not be starting. Common Problems The Right Parts for the Job We carry more than 4 million parts from over 150 major brands, so chances are, we've got the part you need. Learn how to diagnose an Echo SRM 225 that won't start possibly due to bad crank seals or leaky exhaust gaskets without special tools. Garage sale Echo trimmer will not start. Your problem of Echo SRM 225 running only when the choke is on can be solved if the fuel filter gets useless. I can get it to start with carb cleaner but I can’t get it to idle for more than 15-25 seconds and I can’t even get it started without. What am I doing wrong? 9 12 comments Best Add a Comment. Many components inside an Echo weed eater can become overheated after extended use or if left in direct sunlight for too long. Below is a list of issues that could cause an engine to stall: Fuel problems Faulty choke Clogged fuel filter. Carbon buildup sometimes increases compression. The primer is a small plastic bulb with an attached line that feeds the string trimmer fuel. My old Echo hedge Trimmer won't start this year. 03 - Echo String Trimmer Carburetor Repair Kit. A problem with some or a combination of these parts could cause the weed eater to cut off after turning it on. Poor Quality Fuel - If you're using low-quality fuel, it can cause your weed eater to not start. 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. 4 cc Gas 2-Stroke X Series Straight Shaft String Trimmer The X Series ECHO SRM-2620 weed trimmer redefines The X Series ECHO SRM-2620 weed trimmer redefines the performance standards for professional landscapers. Remove spark plug and try to move engine manually. If that is your case try this and replacing the spark plug. If your Echo weed eater doesn’t start, it could be due to overheating. Inspect the spark plug for signs of wear or damage. This happens with the plug wire disconnected, with the carb removed, and with the muffler removed, as well. There are a few reasons why your weed eater may not be starting. 01 - String Trimmer Spark Plug. Shop by Popular Echo String Trimmer Models. Sometimes your weed eater will start and idle correctly but dies when you give it gas. It should perform with little or no visible smoke coming from the exhaust. After 1+ hours, it restarts fine, runs fine, and works great--for another 30 minutes. 1 Weed Eater Won t Start: Causes Of A Stalling Weed Eater. Having trouble starting my Echo SRM-210 string trimmer. There are a few reasons why your weed eater may not be starting. Common reasons an ECHO weed eater won’t start: Check out the DynaTrap Mosquito & Flying Insect Trap – Kills Mosquitoes, Flies, Wasps, Gnats, & Other Flying Insects – Protects up to 1/2 Acre (link to Amazon). When you find your ECHO string trimmer won’t start, the best thing to do is to first rule. ECHO trimmer won't start HELP!!!! dystonia4life 123 subscribers 66K views 10 years ago I just spent 58. Remove the boot from the spark plug on the trimmer. Below is the troubleshooting process to get your Echo weed eater to run at full throttle. I have a echo SRM-210 string trimmer that won't start. 03 - Echo String Trimmer Carburetor Repair Kit. Connect the other end of the tester to the spark plug. This tiny part can be clogged quite easily if fuel has been left in the trimmer, which would prevent it from starting up properly. I wonder if the spark components fail. Locate the spark plug and remove the insulated boot from the terminal. Weed Eater Won t Start: Causes Of A Stalling Weed Eater The engine of a weed eater is made up of several parts. Clean The Air Filter Sometimes air filter gets clogged from dust and debris and this may be one reason for your problem. Step 5: Disassemble the Motor Housing. A clogged carburetor is most commonly caused by leaving fuel in the string trimmer for a long period of time. pull and clean your spark plug with some carb cleaner and a wire brush. These are the maintenance items that should be replaced annually or more frequently to help keep your trimmer running at its best. G-1AK GT-1000 GT-1100/SERIAL: 181001-252599 GT-140 GT-140A GT-140B. Echo (pas 225) trimmer (new carb and spark plug) not starting It had been working now about a few uses since replacing the carb and I checked the exhaust screen and cleaned it and I noticed the plug seemed wet. If you don't have a spark, you probably have to replace the ignition coil/module. With the starter recoil removed. If it will not fire in the regular mode of starting (priming and choking) then you may want to check for air leaks--jug base gasket, intake gaskets, isolator block. Locate the spark plug and remove the insulated boot from the terminal. All of the other steps will apply. At some point it just stopped starting. Start up issues are usually due to fuel or the ignition. 03 - Echo String Trimmer Carburetor Repair Kit. Echo weed eater will not run full throttle. Many components inside an Echo weed eater can become overheated after extended use or if left in direct sunlight for too long. cleaned it, popped it in and voila! lots of smoke for a bit, but running like a champ. How to Fix an Echo Weed Eater That Won't Start (SRM-225) 50,711 views Nov 23, 2020 459 Dislike May Mow 238 subscribers So you've checked the spark plug, cleaned the carb and even checked your. Sometimes your weed eater will start and idle correctly but dies when you give it gas. Step 6 Hot start the trimmer using the same procedure outlined above. 2-cc engine with reduced-effort starting technology. Garage sale Echo trimmer will not start. Once the engine is running, slide the choke lever down to the open position. To fix this issue, follow these steps: Remove the starter cover and inspect the rope and spring. Still got nothing, just an occasional caugh. Links below may help trouble shoot your issue including manual. Now it won't start, hot or cold. Repeat with the other clutch plate. Still no go, if you say primer bulb shows fuel in it, and you press the primer bulb say 10x and choke on and still no fuel in engine, the. my echo weed eater wont start i put new gas/oil in it rebuilt the carb i have cleaned the carb with wd40 tested. Poor Quality Fuel - If you're using low-quality fuel, it can cause your weed eater to not start. The first thing to do is to test the current idle speed of the weed eater. Poor Quality Fuel Fouled Spark Plug Clogged Fuel Filter Clogged Carburator Clogged Spark Arrestor. Replace the rope or spring if they are worn or damaged. Carburetor restriction because of keeping fuel for a long time in the tank. Twice the engine gained RPM's while spraying carb area. How to Fix an Echo Weed Eater That Won't Start (SRM-225) 50,711 views Nov 23, 2020 459 Dislike May Mow 238 subscribers So you've checked the spark plug, cleaned the. Your engine will require more fuel to start, which can lead to problems like poor performance or even a lack of power. Echo Weed Eater Is Not Starting: Reason & Fixes It mainly happens due to the following 4 reasons: Bad fuel. You may have one or more problems preventing the primer bulb from priming. Replace if necessary Engine is seized With the starter recoil removed. A problem with some or a combination of these parts could cause the weed eater to cut off after turning it on. Weed Eater Won t Start: Causes Of A Stalling Weed Eater The engine of a weed eater is made up of several parts. The carburetor might be clogged. Learn how to diagnose an Echo SRM 225 that won't start possibly due to bad crank seals or leaky exhaust gaskets without special tools. [1] 2 Take off the spark plug with a spark plug wrench. A clogged carburetor is most commonly caused by leaving fuel in the string trimmer for a long period of time. Its runs on a prime but will not continue to run. The shock should free it enough to allow you to unscrew it by hand. Your engine will require more fuel to start, which can lead to problems like poor performance or even a lack of power. To determine if the spark plug is defective, use a spark plug tester. Usually a small amount of debris or varnish can cause the valve not to seat completely. Why your Weed Eater Won't Stay Running. Clogged fuel filter Faulty spark plug Clogged carburetor Before we move onto further details, let us give you a brief idea about the Echo weed eater and its various features to better understand its problems. If your Echo weed eater doesn’t start, it could be due to overheating. Shop by Popular Echo. If the compression is in the neighborhood of the recommended range of 120 psi it should fire on carb/choke cleaner. 1 Weed Eater Won t Start: Causes Of A Stalling Weed Eater. Will go through carb and install repair kit. Your string trimmer (also known as a weed whacker or weed trimmer) draws fuel from the tank to the carburetor via the primer. Removal of the carb base and diaphram will indicate if the needle valve is free and clear. Holding the plug in place by the insulated ground and not touching. Hold the start trigger down until the engine is running smoothly. There are seven problems behind it. Weed Eater Won t Start: Causes Of A Stalling Weed Eater The engine of a weed eater is made up of several parts. For example, gas that is more than 30 days old is lower than 89-octane, or contaminated with water may not offer enough spark to ignite the engine. Learn how to diagnose an Echo SRM 225 that won't start possibly due to bad crank seals or leaky exhaust gaskets without special tools. Try as I might, I can't ever get it to restart at that point. Wedge a flat-head screwdriver on the end of one of the clutch plates and tap it with a hammer to turn the plate counterclockwise. Echo SRM 225 String Trimmer Won't Start - Flooded Know How Now 70. This sticky fuel can clog up the carburetor and. When you find your ECHO string trimmer won’t start, the best thing to do is to first rule. 2) Clean The Carburetor Once gas breaks down, varnish, gums and other debris can form inside the carburetor and clog the tiny fuel passages. I suggest you remove the carburetor look closely at the engine exhaust port for carbon buildup. This is usually a sign that the engine is not receiving sufficient fuel or air, which causes poor combustion. It behaved the samestart, would idle, bog out on depressing the throttle. String trimmer starts then stalls. String trimmer won't start. The Echo product line of power equipment includes the Echo 225 series string trimmers. 9K subscribers 22K views 9 months ago Echo SRM Weed Eater keeps flooding & won't start. I didn't really test much with a new plug more than trying to get it to start. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. Any idea of what else could be wrong? Thanks Answered!. Easy fix 61,719 views Sep 27, 2019 863 Dislike Share Home Garage 65. I took the following steps: *Emptied the gas tank and put clean fuel in *Cleaned the Carb with Carb Cleaning Fluid *Replaced the air filter and spark plug *Replaced the fuel line system *Finally replaced the carb It still won't start. Your problem of Echo SRM 225 running only when the choke is on can be solved if the fuel filter gets useless. Apparently the inlet needle valve within you carb is not closing causing fuel to flood your unit. If your weed eater won’t start, trying removing the air filter and spraying carburetor cleaner into the intake. Worn Starter Rope or Recoil Spring. I have put fuel directly into the cylinder … read more JON Master Service Tech MASTER SERVICE TECH 5,798 satisfied customers I have a 4-cycle trimmer and it feels like the pull rope is. The starter rope and recoil spring on your Echo string trimmer may wear out over time and prevent the engine from starting. The only difference is that you do not close the choke. Troubleshooting An Echo Weed Eater That Won't Start. ECHO trimmer won't start HELP!!!! dystonia4life 123 subscribers 66K views 10 years ago I just spent 58. Here are the most common culprits: 1. Common Reasons Why Weed Eater Wont Start: Issues and How to Solve them If your weed eater isn’t starting it could be: Gasoline problem Dirty air filter Faulty spark plug Faulty Ignition coil Malfunctioning carburetor Dirty spark arrestor Flooded Engine Electrical or battery malfunctions 1) Gasoline Related Problems. Poor Quality Fuel - If you're using low-quality fuel, it can. Carburetor Issues; 2 Maintenance Tips. I have a "spark tester" for small engines. Start up issues are usually due to fuel or the ignition. If your Echo weed eater doesn’t start, it could be due to overheating. In short, compression is not a concern. The issue may have something to do with the carburetor. If the fuel tank is empty, there is no fuel for the engine to burn, which means that the engine will not start. This problem is common for many a 2-stroke trimmer,. This is usually a sign that the. It then gives percentages of 80% for low limit and 130% for high limit. Ok, we can cheat, remove the spark plug and firmly hold your finger over the spark plug hole, give the starter a good pull, the engine should have no problem blowing your finger off. String trimmer won't start. If your Echo weed eater doesn’t start, it could be due to overheating. 00 bucks on a new carburetor and this trimmer still won't start any suggestions would. There are two procedures used to start the engine -- the cold-start procedure which activates the manual choke and the hot-start procedure which does not use the choke. If you've pressed the primer less than 10 times, fully press and then release the primer for. New plug, sprayed carb-cleaner in all the orifices, and set the L screw to 1-1/4, and the H screw to 7/8 turns. Now that your weed eater is put together, it should fire up. Echo weed eater will not run full throttle. It is best to run the trimmer at full-throttle. Sometimes your weed eater will start and idle correctly but dies when you give it gas. When the primer won't prime, the engine won't run. Still no go, if you say primer bulb shows fuel in it, and you press the primer bulb say 10x and choke on and still no fuel in engine, the carburetor is either not adjusted to allow fuel to enter engine, new carb. Fyi, keep the spark plug wire away from your hand or you'll get bit Customer:. Echo (pas 225) trimmer (new carb and spark plug) not starting It had been working now about a few uses since replacing the carb and I checked the exhaust screen and cleaned it and I noticed the plug seemed wet. Be aware that unburnt fuel of an Echo string trimmer could build up in the muffler and may produce smoke when the trimmer runs at half throttle. This tiny part can be clogged quite easily if fuel has been left in the trimmer, which would prevent it from starting up properly.