.Why your Stihl trimmer wont run .....What to look for ... My stihl fs55 trimmer wont run at full throttle tried adjusting at owners manual recomended settings help - Answered by a verified Technician. Be sure to depress the throttle to rev the engine before it dies. How To Start A Weed Eater Stihl If the spark arrestor is clogged, the engine may stall. Do not operate the throttle, run the equipment only at idle speed until the engine stops!) STIHL recommends the use of STIHL MotoMix ® fuel which is pre-mixed with STIHL HP Ultra synthetic oil. When the mixture is too rich, the excess oil will get burned off in the internal engine . gideon. Stihl FS 76 won't come up to full RPM at WOT 07-01-09, 07:13 PM. Over time, the spark arrestor can become clogged with soot. Stihl FS90R...Wont throttle up | LawnSite™ is the largest ... And make sure your Fuel cap is still breathing. How to recognize and solve issues related to a dirty air filter A dirty air filter is one of the most common causes behind a leaf blower that is bogging down: the air is enough for the engine to idle, but as soon as you switch to full-throttle, the machine will stall . STIHL MM55 WONT START WONT STAY RUNNING | Solved That! STIHL MotoMix ® can be left in the machine during seasonal storage . My stihl fs55 trimmer wont run at full throttle tried ... Wont stay running usually indicates a clogged carb or cracked/broken/clogged fuel lines. Start the trimmer and gently unscrew the gas cap halfway off. Broken Pull Rope If your weed eater has a broken pull rope, it can make the machine malfunction. I went through the possibilities and it turn out to be the fuel filter. If you want a reliable 4 cycle string trimmer by a Shindaiwa C4 or a Stihl 4-mix trimmer. I have a 15 yr old Stihl FS 76 trimmer that is has been used moderately and never abused. But there are times that I'm at WOT for long periods of time as you would with most blowers. STIHL MotoMix ® contains no ethanol and has a storage life of up to two years. 01 - Spark Arrestor. After pushing the priming button two or three times, close the . Replaced the carb, fuel filter and spark plug with same result. I can get it to rev up by squeezing the trigger on and off quickly, but if I . Stihl Battery Weed Eater Won't Run With Choke Off Hanging Loop - Hang your cordless trimmer securely on a wall to save space using the loop in the handle housing. The first thing to check before anything else is the mixture screws. Same with no choke. It is a steep learning curve but in the long run it was well worth it. Well, it depends on what type of idling issue we are talking about. To do this, slowly unscrew the screw (L) to the right and to the left. . When I open up the throttle to full RPM the engine runs great for a couple seconds and then just shuts down like it ran out of fuel. My Mculloch/Husquvarna strimmer starts fine, but after 5/10mins won't run smoothly on high throttle and eventually stops. Fastest way to fix your unit if it doesn't rev up. I can do a few Stihl 011 chainsaw starts but won't run full throttle - DoItYourself.com Community Forums Thanks. . If I get off the throttle in time, the engine will return to idle and keep running. Whether it be a dirty air or fuel filter or inferior fuel, let's look at how you can troubleshoot a weed eater that keeps dying. I replace starter coil, carb, and spark plug and no start. You go out to start your brush cutter, weed whacker, or string trimmer and it won't start. 2) Accelerator pump: the carburetors on these come with a tiny accelerator piston that wears out and leaks like hell. Rep: 35. Turn off the engine and remove the gas cap. New coil pack, new spark plug, new air filter, oil level is fine. Common solutions for: Stihl String trimmer starts then stalls. Now, hold down the throttle trigger located on the handle near the engine. Won't cycle up to full revs. Also check your air filter. 14 . Even when you try to repair it, it may not function the same. Squeeze the throttle and lock so the throttle stays wide open Set the choke open Prime at least 5 times(I prime until the bulb is full and give it another pump or two) Pull cord until it starts then dies Turn off choke and pull cord until it starts Once it is running, squeeze throttle lever to disengage the tongue and settle to idle speed. Options. STIHL FS280K Full throttle revs up and down . After running at full power for about 10 minutes, the engine speed slowly decreases until it barely runs. If the weed eater starts up without issue and stays on when you rev the throttle, you have fixed the problem. To unclog the spark arrestor, remove it and clean it with a . June 2016. Aug 6, 2014. It started up on the second pull. I think one of our stihl's was over 15 yrs old, and still ran like a top. #3. Start up the engine and allow it to warm up. Add a comment . All of the small 2-stroke blower, chainsaw, weed eater engines I have worked on have three screws. Stihl weedeater, starts good reves up good, wont idle, have to play with throttle to keep it running, tried - Answered by a verified Motorcycle Mechanic . Once the peak is found, back off the screw 1 . No matter what I did, I could not get it to work right. My string trimmer is a FS250 which is the last of the two strokes. I have replaced the fuel filter, fuel lines and carburetor. Both can be ran in multiple position where the TB can only safely be ran only in upright position. Bottom (T). So I removed the shaft and started the engine. Insert the spark plug and turn it clockwise until tight with an adjustable wrench. Press the trigger of the machine to rev the engine. Remember these two points and position the screw so that it is somewhere between the two extremes. Explore Our . I've recently acquired an HS80 hedge trimmer that looks like it has had little use, but has been giving me fits. Adjust the H screw the same way, but while the engine is running at full throttle. 3. move up one slot, which is no choke and a little throttle, and keep pulling until it starts. Set the low speed fuel adjustment. Begin by setting the idle speed. Starting a Stihl weed eater is easy and should take you less than 5 minutes if you follow the steps. There are several reasons why your weed eater's engine could bog down during operation, including low fuel, dirty filter as well as a damaged electrical system. hello, I have a Stihl FS 55 weed trimmer and it's 12+ years old. In this video I give youtubers the basic reasons .But in the follow up video in part 2. Cleaned spark plug. 1. off. If the engine is still running, that means the gas cap may be the culprit. July 2014. At the end of this season, I planned to run the tank dry to store it for the winter. If it is still not working, then you have to work on the fuel hose. Hold in the throttle trigger and pull the starter cord to start the weed eater. . They eventually replaced it just because of it's age. Leaving the choke on while operating will result in excessive fuel consumption, irregular engine power performance and eventually may even damage the engine. As the engine draws air through the combustion chamber, this prevents the weed eater from overheating and allows for smooth, safe operation. Stihl fs 55 in practice carburetor & lawnmower stihl fs 55 how to adjust carburetor on. If it was a bad coil i would have to believe it wouldn't start at all. Be sure you drain any fuel from the tank to prevent leaking in later steps! What Causes A Weed Eater Not To Run With The Choke Off? Trimmer was working great, but then started to bogged at full throttle. 0 /1024. Replaced it for $40.00 and it was like new. If you've tried a few times and it still won't start, and you smell gasoline, you've probably flooded it. I have a 32cc craftsman weed eater, model # is 358.791070. To return the engine to idle, depress the throttle control when it starts. This is a relatively common symptom and our repair guide can help you fix it. One reason why one of these trimmers may die at full. Hedge Trimmer: Engine Will Idle But Dies At Full Throttle . Troybuilt won't run full throttle . Here's a description of the problem: The unit starts fine, and once it warms up a bit, it will transition ok - not stellar, but maybe a little hesitation - but it won't stall. Check the Engine Condition. to learn as much as I could from the google machine and I'm to the point now where when you start it up and hold the throttle, it will run at max throttle, even half throttle, but when you let off the throttle for it to idle, it will idle for 2-3 seconds then die. STIHL MM55 WONT START WONT STAY RUNNING - A few years back my trusty old MANTIS TILLER died after many years of faithful service. Remedy this by adjusting the high-speed screw. The engine may already run better at this point. I pulled the carb apart and 'wiped' it down.it did not seem very dirty anyways. And for the future, TruFuel is your friend... Last edited: Aug 6, 2014. Do not operate the throttle, run the equipment only at idle speed until the engine stops!) Go back to step (4) and reset the idle speed. 2 . Now, the FS120, tt really doesn't want to idle. CLICK THIS— https://amzn.to/2znPHwh. If you've used the correct procedures in attempting to start your Stihl, but it won't fire up, there may be an issue with your spark, fuel, or air in the combustion . Feb 29, 2020. While at full throttle, turn the 'high' screw until you get the engine to run at it's smoothest and fastest point. Stihl FS 56rc bogging down at full throttle due to clogged spark resistor. The Diaphragm Chainsaw Won't Idle. If your Stihl trimmer stalls at full throttle, this could be related to the air circulation. If it doesn't start at each detente in that number, it's flooded or there's a mechanical/plugging issue or bad fuel. Clean the fuel filter with petrol or kerosene and then dry it up with airflow. Posted: 08/05/2018. February 2008. Mixture Screws. A weed eater is an essential instrument for any gardener to have. An engine that requires the choking ( partial or full ) after initial engine warm up is an indication that the engine fuel air mixture system is out of adjustment. Took it to the dealer and am told it is a bad coil. Sometimes, your chainsaw will only idle for about 5 to 10 seconds after you let off the throttle and then it will shut down. Additionally, it is ideal to use on unleveled terrains where lawnmowers cannot go. Fastest way to fix your unit if it doesn't rev up. My echo weed eater runs but at.full throttle muffler get hot and glows red hot can you run without muffler. As soon as I release the throttle, it dies. Sometimes you give gas, and the trimmer floats. If the saw drops at full throttle, not enough gas or air is reaching that chamber. 2019/04/23 16:57:19. riversr54. I tried loosening that t25 bolt and pushing the throttle cable in all of the way but it was pretty much all the way in. I also have a Stihl FS55 trimmer that will only run when I put a little gas in the piston, then dies out when it burns through those drops. Myself, i have 2 saws, one 026, a 044, a pole type hedge trimmer, and a weed eater, all have given me great service. If you've measured this mixture wrong, your fuel may be causing your engine to smoke. 1. … Permalink; History; Carb Adjustment solved my problem - Funny they say you cant adjust these but I . The fuel mixture on a Stihl weed trimmer is 50:1 gas to oil. The throttle cable connects the throttle trigger to the carburetor. Post your model number for more specifics. I explain more about the carb issues that plague these trimmers. The repair and symptom guide will help you better identify the part needed to be replaced and how. The inability to reach full power during a full-throttle trigger is also a sign of bogging down. Stihl trimmer won't idle down. If I gradually open the throttle it will rev up like a scolded dog. Some people would say it bogs or boggs out or it doesn't come up to high rpm's. Common on fs38, fs45, fs55, bg55, bg50, and hs45. Cancel Post comment. How to start a weed eater stihl. Having experienced several years of flawless operation of a STIHL FS85 STRING TRIMMER I bought the STIHL MM55 with . How to Prevent Your Chainsaw from Bogging Down. Begin by checking the saw's air filter. 4. Some Helpstart in the 2 stroke mix, used in my 4stroke mower. These procedures help in improving your chainsaw performance. Being the type of person who likes to try new things I decided to switch brands and go with STIHL. These problems are typical for gasoline vehicles, including Husqvarna 128r, Stihl FS 38 and Hitachi of various modifications. Any thoughts? When your Stihl MS 170 chainsaw drops its power under full load, it generally means there is an improper mixture of fuel and air in your carburetor. Stihl MS 290 oil leak. Weed eaters are a necessary tool for any homeowner, but they can become a headache when they die after you give it gas. My Stihl weedeater won't run full throttle. New fuel lines. Hold in the throttle trigger and pull the starter cord to start the weed eater. It's common for the rubber seal to let tiny amounts of extra air into the mix, meaning there is too much fuel getting into the carb. Insert the spark plug and turn it clockwise until tight with an adjustable wrench. After that, reinstall the fuel filter and try once again to start the chainsaw without choke on. STIHL recommends the use of STIHL MotoMix ® fuel which is pre-mixed with STIHL HP Ultra synthetic oil. The STIHL troubleshooting video and corresponding iCademy module are ideal checklists to use when performing repairs and will assist the technician in performing a step by step analysis of the machine. We also recommend that if a unit will be left unused for more than 30 days that it be stored 'dry.' This means emptying the fuel tank and then restarting and letting the unit run until all the fuel is consumed and the engine stops. How I fixed my Stihl trimmer from bogging.It only takes 10 minutes to fix and its easy to do.Dont mind all the kids yelling in the background, its my daddy d. All STIHL gasoline-powered engines can be used with up to a 10% (E10) blend of ethanol in the gasoline/engine oil mix. My weed eater will not start unless the choke is on. 1 . Thanks Summing It Up. This spring I added new gas mix (fresh gas and new Stihl mix per directions) and it ran fine the first use. Here is what i have exactly: Stihl FS85 trimmer that has a Zama C1Q Carb. 1) Ignition module: rumor has it these are PCI that switch timing throughout the rev range. Craftsman String Trimmer won't idle. 2. once warm, start without throttle. Turn the choke off and assess. Before you start the saw, locate a small flat-bladed screwdriver. The cutting tool will rotate. When the cable is pulled, it opens the throttle on the carburetor to accelerate the engine. Cleaned spark arrestor screen. Also try speeding up the idle, the lower adjustment screw,to just below where the head starts to turn. To get things started, what are the dangers of operating a chainsaw that doesn't idle properly? 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. 1. STIHL MotoMix ® can be left in the machine during seasonal . Wipe the spark plug dry with a shop towel; A motor that can't get enough air will run roughly and lose power . I had to replace the carb 2 years ago because it got crapped up. Applies to all trimmers, blowers, hedge trimmers and some chainsaws. Get shopping advice from experts, friends and the community! If it's on the weed eater starts right away and runs at really high rpms, (basically full throttle) even though the choke is on full and I'm not touching the throttle. Husqvarna Garden Tools, Grass Trimmers. It was easy to start all season. Stihl weed eater won't start. 4. lowest, full choke, and pull four times or until it starts. From there, turn it out 3 full turns. To adjust the L screw, start the weed trimmer and turn the screw counter clockwise until the speed of the engine decreases. How to Adjust the Carburetor on a Stihl Weed Eater Turn the high-speed screw, marked 'H' counterclockwise until it stops. It starts fine, idles fine, revs up without hesitation but won't come to full High RPM on wide open throttle, which is listed as 10K in the OM. Remember, when your Poulan chainsaw runs only with choke on, it surely . STIHL MotoMix ® contains no ethanol and has a storage life of up to two years. Bad fuel hose may cause this. The last (2nd) time I went to run it, whenever I gave it a lot of throttle (past 3/4) it tried to die, but letting off the throttle completely it also attempted to die. The weed eater starts fine and runs good, but when I pull the trigger, the engine stalls. If you can't get the engine to run at full throttle, adjust the 'high' screw until it improves. If the module gets "stuck" in r3tard mode the unit will start but lack power and if in advance mode hard to start but will run normal. In fact, it won't run at all unless the air filter is off. How to start a weed eater stihl. But it it sat for 2 months before I got around to getting it ready. The spark arrestor is a small screen that prevents the engine from emitting sparks. If the throttle cable is broken, replace it. Engine starts and idles great. {suc. Bundu. The problem is if I quickly open the throttle all the way, it bogs down and stalls. To figure out what is causing the problem, turn on the weed eater once again and listen for any kind of engine activity. is responsible for adjusting the engine at idle. Don't know what model but it is a good performer when it's running right. . I also have an Ebay purchased $12 carb. 2. xman23 Minister of Fire. I never had any trouble with them. Continue to use sharp strokes to start the engine until it ignites. String trimmers come as one of three varieties: petrol-driven, electrical (corded), or battery-powered. My Stihl Weed Trimmer Is Dying at Full Throttle, Repair Clinic: String Trimmer Won't Start, How to Troubleshoot a Ryobi 31cc String Trimmer, What to Do When a Ryobi 4-Cycle Trimmer Won't Start. Wipe the spark plug dry with a shop towel; (Warning! Tighten the 'L' screw all the way, then turn it one turn counterclockwise to open it. Have loosened fuel cap to to if any starvation but same problem. The posters saw might have a loose wire, that vibrates and causes it to not have a good connection. It is a simple but effective power-tool to neatly trim lawns around edges, fences, and other objects. 9. The Stihl FS120 was not idling so I decided for fun to try to fix the FS120 that won't idle with looking threads and videos. To adjust, turn the screw a quarter turn without fail counterclockwise. I have a Stihl string trimmer. manuals for STIHL 4-MIX® engines outline testing procedures as well as special tools that are needed to repair the equipment. Louis @louis56. Retaining Latch - All STIHL Battery powered products feature a retaining latch that is designed to prevent the unit from unintentional starts when the battery is inserted. Stihl trimmer FS55. 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. To start up your Stihl trimmer, you must first make sure the on/off switch is set to on -- many people forget this simple detail. I found a new stihl trimmer in a trash can with a bent shaft. New air filter. We use cookies to give you the best possible experience on our website. Some people. Do this again clockwise. Start the engine and warm it up. I even made a new gas/oil mix with fresh gas. changing the fuel/air mixture), or it will run but surges. Put some fresh fuel in it and prime the heck out of it to flush the carburetor. Note: this is a general repair guide. Too much oil in the fuel. Had new fuel lines last year, mostly ok til now. I have had good performance from this beast. Retaining Latch - All STIHL Battery powered products feature a retaining latch that is designed to prevent the unit from unintentional starts when the battery is inserted. Check the fuel level. I have a Stihl MS250 with a Walbro WT 215 carb. Usually, was able to fix a few things that way (like a microwave, a dishwasher, 2 mowers). When working with the trimmer, you need to monitor its behavior all the time - a drop in speed and unusual noise signal a malfunction in the unit. 128LD string trimmer won't start (6 Replies) heavy gas fumes in garage days after shutting off mower (6 Replies) . If the throttle cable is broken, the engine will not accelerate, and the trimmer head won't spin. Jump to Latest Follow 1 - 7 of 7 Posts . When you depress the trigger, a vent on the carburetor opens, allowing more gas to reach the mixing chamber. NOT just Leaf Blowers! 03/21/2020 by Timothy Cavazos. As the unit runs longer, it starts to misbehave. Here are 10 reasons and fixes to help prevent lack of fuel to a 2-stroke engine. If it is too clogged or dirty, a gas cap replacement is needed. On the other hand, if your trimmer starts up, but the engine sounds erratic, you should take apart the carburetor to investigate further. I figure one of the passages in the carb was clogged beyond de-clogging. Full Forum Listing. Wait about 10 minutes before you try again to give the gasoline time to evaporate. However, you can buy a new card for it to function better. If it's smoking, it means you've added to much oil to the mixture, causing it to be too rich for the engine. This is a common problem for gas weed eaters, and it is generally caused by low-quality fuel or a dirty fuel tank. Start it, run it, and then when it dies. Stihl Battery Weed Eater Won't Run With Choke Off Hanging Loop - Hang your cordless trimmer securely on a wall to save space using the loop in the handle housing. 1. screen out of the muffler and burn the carbon out of it. NOT just Leaf Blowers! The only 2 solutions are to either replace the carburetor or give it a good, thorough cleaning. Put in new fuel lines and fuel filter and clean out the carb. First, you need to remove the filler cap and pour a 50:1 oil-to-gas ratio fuel into the trimmer. Trimmer: Engine Will Idle But Dies At Full Throttle . Also tried lowering the idle with the idle screw to no avail.it did change the idle but wouldn't go low enough. Applies to all trimmers, blowers, hedge trimmers and some chainsaws. Just made me a better mechanic. Here is what I have done so far to fix it (nothing for me has worked yet): New fuel filter. Clean it thoroughly with warm, soapy water and gently rinse. I find that I don't have to run them at full throttle all the time, so I feather the throttle based on how much air I need. The fuel air mixture screws on the side of the carburettor are marked H for High for the engines high speed adjustments and the L means Low for the engines low speed adjustments . Well, that all resulted in a saw that starts easily but won't stay running. 04 - Throttle Cable. #1. I have a four-year-old Stihl SH 85C blower that has developed a problem the last three times I have used it. Stihl manufactures trimmers with two-cycle engines as well as ones with four-cycle engines, and both require a mixture of gasoline and oil. The "L" screw is for low speed tuning, the "H" screw is for high speed (wide open throttle) tuning and the third screw (usually not labeled) is for idle speed adjustment. Once I take the choke half off, the engine dies unless I give it full throttle. If I shut it down and let it cool off for about 5-10 minutes, it starts right up. 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Fuel or a dirty fuel tank the first thing to check before stihl weedeater won't run full throttle else is the mixture screws to better. Likes to try new things I decided to switch brands and go with Stihl HP Ultra oil! Until the engine draws air through the combustion chamber, this could be an fix! By checking the saw drops at full throttle - DoItYourself.com Community Forums Thanks Dies I! Learning curve stihl weedeater won't run full throttle in the 2 stroke mix, used in my 4stroke mower to two years the engine. # is 358.791070 learning curve but in the internal engine give the time. > trimmer was working great, but then started to bogged at full throttle the.. Working, then you have to work on the carburetor or give it good... Air is reaching that chamber time to evaporate Ebay purchased $ 12 carb sometimes you give gas, and pulling. After that, reinstall the fuel filter problem, turn on the fuel filter spark... Sure you drain any fuel from the tank dry to store it for the winter means the gas cap be... Unleveled terrains where lawnmowers can not go usually, was able to it... Repair guide can help you better identify the part needed to be culprit! Repair guide can help you fix stihl weedeater won't run full throttle of a Stihl weed eater from and... Machine malfunction Ultra synthetic oil ago because it got crapped up full throttle - DoItYourself.com Community Forums.. Removed the shaft and started the engine tight with an adjustable wrench that plague these.! Starts to turn is the mixture screws return the engine draws air through the combustion chamber, could! You try to repair it, it Dies once but won & # x27 ; wiped #... On, it starts to misbehave depends on what type of idling issue we talking. Tiny Accelerator piston that wears out and leaks like hell new coil pack, air. Filter and clean out the carb was clogged beyond de-clogging //www.reddit.com/r/smallengines/comments/pi6da4/craftsman_string_trimmer_wont_idle/ '' > why Does my chainsaw Bog down chainsaw. The first thing to check before anything else is the mixture screws you cant adjust these I. Trimmer in a trash can with a bent shaft ethanol and has a broken Rope... Have to believe it wouldn & # x27 ; t rev up vibrates and Causes it to function better,. Minutes, the excess oil will get burned off in the long run it was worth. Throttle, and pull four times or until it barely runs Rope if your weed eater from and...

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