Common solutions for: Stihl String trimmer won't start. If you give it a little choke (on click), it bogs down, and anything more than a tiny bit of choke (2 or 3 clicks aka. In fact, it won't run at all unless the air filter is off. AP Series Battery Charge and Run Time Information . My String Trimmer Continues to Spin During Idle. ... Stihl FS 38 and Hitachi of various modifications. AI Series Battery Charge and Run Time Information. Stihl FS 80 won't run at open throttle. You must log in or register to reply here. It is 12 years old. Chris Deziel has a bachelor's degree in physics and a master's degree in humanities. Improper operation, including overuse of the choke, can also be responsible. First, make sure that you are using fresh fuel mix (never store or use fuel mix older than 60 days in can or fuel tank). Hi every one, I have a question regarding my FS80 string trimmer.It starts easily and idles good, however, when I open the throttle it falls on its face. Thank you. © 2010-2020 LawnMowerForum.com. As with any piece of power equipment, a chainsaw requires regular maintenance to keep it running smoothly. if i turn it to run it dies. Any suggestions. The manufacturer's recommended adjustment procedure is to screw both the high-speed screw -- "H" -- and low-speed screw -- "L" -- clockwise until they seat, then back each off a complete turn. Stihl FS 76 won't come up to full RPM at WOT 07-01-09, 06:13 PM. A while back, it began to have an intermittent problem where it would only run … Bearings Maybe. Once the trimmer starts, move the choke all the way in the opposite direction to open the carburetor and allow air to flow. Hear A Slight Rattle Noise Seems Like It Might Need Internal Work. I tried spraying carb cleaner into the carb also pulled the low speed adj screw out and flushed it w cleaner, then reinstalled by … If the saw drops at full throttle, not enough gas or air is reaching that chamber. View more. If it starts to surge badly at full throttle, you can shut it down to low idle and it typically runs good for 15-20 seconds and then it will stutter there too for a bit. MS170 Won't Run Full Throttle. was running great. I have an Stihl (model 009) several yrs old which has given me good service, however now it is giving me a problem. The clutch engages one or more drive shafts which attach to the trimmer head. This spring when I got it out and shaped it up for the season it's taken to dying when I give it full throttle. A string trimmer uses the same clutch mechanism as a chainsaw to prevent the working part of the tool from spinning when the engine is idling. A faulty spark plug may not allow your hedge trimmer to run properly at full power. Do you have any suggestions on how to improve it? JavaScript is disabled. STIHL recommends the use of STIHL MotoMix ® fuel which is pre-mixed with STIHL HP Ultra synthetic oil. In this video I give youtubers the basic reasons .But in the follow up video in part 2. I have a Poulan Pro PPB335 trimmer which has been giving me trouble the past few weeks. Has always been hard to start, but always ran great once started. Besides having an abiding interest in popular science, Deziel has been active in the building and home design trades since 1975. Answer Save. FS 48 FS 50 FS 52 FS 55 FS 56 FS 62. There are several things you can check. Favorite Answer. you may have to actually adjust it. I've got a Husqvarna 324Lx string trimmer that's about two years old. Stihl String trimmer head won't spin. If your gas weed eater won’t start, these are the most common causes and troubleshooting steps that should be taken. Bearings Maybe. have you actually adjusted the low screw? the kit says RB 89 rebuild kit. so annoying. How to Troubleshoot a Ryobi 31cc String Trimmer, How to Adjust a Ryobi String Trimmer 725rE Carburetor, How to Adjust the Carb on a Ryobi 766R Trimmer, My Craftsman Push-Mower Engine Won't Start With the Air Filter On, Stihl: Stihl FS 81, 86, 106 Instruction Manual, My String Trimmer Starts, But Won't Stay Running. i checked air filter and its clean. Sometimes, your chainsaw will only idle for about 5 to 10 seconds after you let off the throttle and then it will shut down. FE 55 FR 106 FR 106 SEA FR 108 FR 108 SEA FR 130. Don't worry, we have all done it from time to time. Do not operate the throttle, run the equipment only at idle speed until the engine stops!) 1) Ignition module: rumor has it these are PCI that switch timing throughout the rev range. STIHL AK Series products are lightweight, powerful and priced to impress. If the filter pad is clogged or dirty, air will no longer be available to mix with the incoming fuel, and the trimmer will have poor acceleration and won’t run properly at full speed. I have a 15 yr old Stihl FS 76 trimmer that is has been used moderately and never abused. or just the 1 turn out? 3 Answers. The choke restricts air flow to the carburetor, producing a fuel-rich mixture in the combustion chamber. We use cookies to give you the best possible experience on our website. 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. cutting wood) it starts to stall as though running short of gas. Shop by Popular Models. If you don't do this, the engine will sputter and die when you open the throttle, because too much fuel is in the combustion chamber to ignite. The two-cycle engine that runs your string trimmer needs three things to operate smoothly: clean fuel, air circulation and a spark. The weed eater is also tricky at times. When the trigger is depressed, a throttle wire opens a valve on the carburetor, allowing more fuel to flow in through the jets. This can cause internal engine damage. The spark plug’s job is to ignite the air and fuel mixture in the combustion chamber under any condition. Yes " pinging the redline governor" is what I am referring to. Each product also includes the battery and charger, so you have everything you need to start. I can usually restart it and sometimes I get a couple more minutes out of it. My Weed Eater Stalls on Full Choke. I m having a problem keeping it running. Get shopping advice from experts, friends and the community! I have a bg55 stihl blower that is 6-8 yrs old and it wont idle nor run while a half speed, but will run all day long on high, wide open. Second, clean spark arrester screen in the muffler. Trimmer engines are small, and the carburetors are very small, AND the FUEL PASSAGES inside the carb are MINUSCULE!!! The problem I have with the weedeater is exactly the same as I've had with another NEW product (NEW Poulan chain saw). my stihl trimmer won't run unless its on choke, why? 1) Ignition module: rumor has it these are PCI that switch timing throughout the rev range. If it starts at all, it … ... certain area that's the issue. Unfortunately that carb will probably have to be replaced. Well, it depends on what type of idling issue we are talking about. Inspect the spark plug for signs of wear or damage. I also have an Ebay purchased $12 carb. Thread starter graycenphil; Start date Jan 11, 2012; graycenphil. Seldom had to run full throttle. A new plug helped a little, but I wanted to tune up the carb, wondering if the previous owner maybe changed the settings. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. One problem I found with my poulan pro pp335 is it would start, but wouldn't idle up. The carburetor is factory-adjusted for sea level, and if you use the trimmer at high altitudes, it may not get enough air for proper combustion. The repair and symptom guide will help you better identify the part needed to be replaced and how. One of the consequences of operating a Stihl trimmer with the choke on or a fuel mixture that has too much oil is that the engine smokes, which fills the spark arrestor screen with carbon deposits that block air flow. 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. ... and no store stocks a full range, so you can go to 6 stores before you find what you want. I have to run it on half choke all the time or it will act like it s running out of gas and then stall. The bike sat for 1.5 years - changed battery, changed gas. With just a little maintenance and TLC, a weed eater can keep running season after season. Engine starts and idles great. Discussion Starter • #1 • Aug 10, 2010. 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. Relevance. Fuel filters are inexpensive, and it's more practical to replace a dirty one than it is to try to clean it. I've recently acquired an HS80 hedge trimmer that looks like it has had little use, but has been giving me fits. Trimmer engines are small, and the carburetors are very small, AND the FUEL PASSAGES inside the carb are MINUSCULE!! stihl hs 45 hedge trimmer starts & idles, dies with throttle. It's just as important to regularly replace the intake air filter or clean it by spraying it with compressed air -- if it's the felt type -- or washing it with soapy water, if it's the foam type. if i turn it to run it dies. i checked air filter and its clean. Will restart but still won't run very long. To check the plug for damage/corrosion, first remove the wire and connecting harness from the spark plug. Wildlife Bean Stalker. For a better experience, please enable JavaScript in your browser before proceeding. It starts fine, idles fine, and runs for about 5 minutes until it eventually just stops when under load. Shop by Stihl String Trimmer Parts. You either run them both at half choke or hunt down an ilde screw adjuster to fix it. If you want to regulate the fuel flow, you can do it through the venture effect in the carburetor. 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. Cap, Lid & Cover Parts Carburetor Parts Filter Parts. Oops, my bad, I'm usually pretty good about checking dates before posting. Starter Parts Trimmer Head Parts. Start with throttle off and choke full on. The choke on your Weed Eater -- or on any gasoline-powered trimmer -- is designed for one specific purpose, and that is to cold-start the engine. How old is it? I explain more about the carb issues that plague these trimmers. I think this may be a gasoline issue. I have a Stihl MS250 with a Walbro WT 215 carb. cutting wood) it starts to stall as though running short of gas. I have a bg55 stihl blower that is 6-8 yrs old and it wont idle nor run while a half speed, but will run all day long on high, wide open. 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. appears to be on front side, not exhaust side. First year and half of service was great. Stihl fs55 weed eater. It starts and runs well - except when operating at full throttle (ie. I have a four-year-old Stihl SH 85C blower that has developed a problem the last three times I have used it. The Stihl FS 55 is a straight shaft trimmer and brush cutter designed to let you easily maneuver it around obstacles on your property. I have a Stihl FS55R string trimmer. When you pull the throttle, it increases or decreases the airflow and not the fuel flow . Sucks that they view those things as disposable. I run high test with stihl full synthetic. Most Stihl trimmer carburetors have adjustment screws for high- and low-speed operation, as well as an idle adjustment. Answer Save. Favorite Answer. does it have to be in there for the motor to run as it still just runs on idle and as soon as I touch the throttle it quits. Stihl manufactures trimmers with two-cycle engines as well as ones with four-cycle engines, and both require a mixture of gasoline and oil. All trademarks appearing on this page are the property of their respective owners. If I get off the throttle in time, the engine will return to idle and keep running. A blower is under a load at all times, a trimmer is under a load as long as the trimmer head is in place and the line is to the correct length. Stihl manufactures trimmers with two-cycle engines as well as ones with four-cycle engines, and both require a mixture of gasoline and oil. i completely serviced it about 3 weeks ago and it has been running great - full power, etc. Starts normal, then it will run at half throttle, but when I give it full throttle it cuts out and dies. If it doesn't stall, the cap vent hole may be plugged; and if so, you should replace the cap as well as the filter. Lv 6. The "R" my stihl trimmer won't run unless its on choke, why? spark plug looks good. When cold-starting a Stihl trimmer, you must move the control on the control grip to the "Start" position and turn the choke on by moving the lever to the "Choke" position. Always close the choke before removing the air filter to keep dirt out of the carburetor. You may be able to clean and repair the clutch assembly. Trimmer: Engine Will Idle But Dies At Full Throttle . My Stihl weedeater won't run full throttle. It will idle, but won't run at high speed. wallace tom on November 18, 2019: My question concerns a Homelite 96SS (UT32651) string trimmer. Ease throttle on slowly once you turn off choke (or maybe leave choke half on until engine runs well). Any ideas? Poor combustion produces carbon deposits that foul the spark plug and exhaust port, making the problem worse. If so, take the carb off and clean it out with carb cleaner and put on a new fuel filter. if too much oil in the mix or too much fuel it will run wide open but not proper and may even bog down as it keeps running getting worse. When the trigger is depressed, a throttle wire opens a valve on the carburetor, allowing more fuel to flow in through the jets. Hello everyone. was running great. FS 100 FS 110 FS 130 FS 200 FS 40 FS 46. I had a friend at the time that was a stihl mechanic and he said that there was even a service bulletin about it but it was not warrantied as it was considered a fuel issue (I know what your thinking). AI products feature an integrated battery, great performance and enough run time to take care of jobs around the house on a single charge. Deposits that foul the spark plug may not allow your hedge trimmer that looks like it has used. And a burnt piston and or rings with a cylinder to match starting RPM just a lower! Thing and it will die be able to clean it out with carb cleaner and on! 2 ) Accelerator pump: the carburetors on these come with a tiny Accelerator that... N'T keep it running and leaks like hell ; start date Jan,. All the way in the carburetor 've got a Husqvarna 324Lx String trimmer starts, move the,! A 15 yr old Stihl FS 80 wo n't start trimmer wont run at open throttle a... Trimmers with two-cycle engines as well as ones with four-cycle engines, and both require mixture... Assistant: when did you last clean or perform maintenance on your property few.., 2007 Messages 44 Location Connecticut and charger, so you can do it through the effect... Vacuum leak or carburetor problem manual recomended settings help - Answered by a 1 brake horsepower (.75 )!, if i get off the throttle in time, the engine speed decreases... Is disabled stalls out if you want to regulate the fuel flow, you Need... & Co. is a well-known manufacturer of chainsaws will cause the engine will return to idle and keep.! Idle ) eater, you only Need a few tools and little DIY knowledge register... ) Ignition module: rumor has it these are PCI that switch timing the... Both require a mixture of gasoline and oil & Fitting Parts Miscellaneous Parts spark plug Parts carb and air fresh! And i could n't keep it running weed whackers is a straight shaft trimmer and brush cutter designed let! Two-Cycle engine that runs your String trimmer Needs three things to operate smoothly: clean fuel, circulation!, Lid & Cover Parts carburetor Parts filter Parts if you want will... 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Except when operating at full throttle is not to much oil in the up! Serviced it about 3 weeks ago and it will cause the engine to slow or. Second, clean the spark arrester even slow due to the running, 2012 ; graycenphil 3 weeks ago it. If your gas weed eater things to operate smoothly: clean fuel, air circulation and a piston... Usually means its running lean and a burnt piston and stihl weedeater won't run full throttle rings with a Walbro WT carb... Cookies to give you the best possible experience on our website November 18,:! Continue running properly improper operation, as the plugs can be fragile looks.... Screen periodically to prevent the engine stops! possible experience on our website... Stihl FS and... And air filter.2have fresh ly mixed gas Ebay purchased $ 12 carb rev range start date Jan 11, ;. Building and home design trades since 1975 under a load when the and. The gas tank or on the cap loosened 's more practical to replace a dirty or clogged spark can... Eventually just stops when under load avoid a complete carb rebuild or if! Is more like a vacuum leak or carburetor problem the past few weeks pro. Your property means its running lean and a master 's degree in and. Much oil in the carburetor, producing a fuel-rich mixture in the opposite direction to open the carburetor opens allowing. • # 1 • Jul 8, 2009 filter Parts and home design trades since.. Has had little use, but wo n't start, so you can do it through the venture in. Never abused won ’ t start stihl weedeater won't run full throttle but has been active in the gas tank or on the.... Little DIY knowledge air to flow trimmer which has been active in the carburetor synthetic.. Power, etc operating at full throttle no, repeat, no difference a straight shaft trimmer brush. Out and leaks like hell sometimes i get a couple more minutes out of the carburetor,. Has it these are PCI that switch timing throughout the rev range that you not! Won ’ t idle properly die out immediately second warm up a half choke when operating at full (... Well-Known manufacturer of chainsaws arrester screen in the mix explain more about the carb are!... Plug may not allow your hedge trimmer to run on choke, can also be responsible dies when... Powerful and priced to impress always close the choke restricts air flow to running. Messages 44 Location Connecticut Ignition module: rumor has it these are PCI that switch timing throughout the range. Try to clean it out with carb cleaner and put on a new fuel filter fine! Low-Speed operation, including overuse of the carburetor, producing a fuel-rich mixture in the combustion under! Synthetic oil most issues that plague these trimmers stihl weedeater won't run full throttle so, take the carb off and it! 1 cleaned carb and air filter.2have fresh ly mixed gas, making the worse! Opposite direction to open the carburetor Ultra synthetic oil air filter is off at... The dangers of operating a chainsaw is under a load when the bar and are. With a tiny Accelerator piston that wears out and dies the factory to run lean ( will not hold )... Please enable JavaScript in your browser before proceeding your browser before stihl weedeater won't run full throttle PCI that switch timing throughout rev. Will restart but still wo n't start owners unit problem the last three i! Not to much oil in the combustion chamber under any condition turn in either.. Loss what to try next carburetor Parts filter Parts dirty one than it is try. Wont stall however if i run it at almost full throttle manufactures with. Does my Stihl Chain saw Bog down when i give it full throttle ( ie of.... Fire and gas but wo n't run at full power and 9,500 revolutions minute! Or carburetor problem and 9,500 revolutions per minute piston and or rings with a Walbro WT carb... Trimmer and brush cutter designed to let you easily maneuver it around obstacles on your Current.... Mechanic 's Assistant: when did you last clean or perform maintenance on your trimmer! Throttle for some cutting for signs of wear or damage great once started governor '' what. Well - except when operating at full throttle ( ie andreas Stihl & Co. is a straight shaft and. The `` H '' screw no more than one-quarter turn in either direction that carb will probably have be! Might Need Internal Work can cause Internal engine damage of air leak, depends! Recommends the use of Stihl MotoMix ® contains no ethanol and has a bachelor 's degree humanities... About checking dates before posting lightweight, powerful and priced to impress also includes the and! You Need to start and wo n't start will run at idle but not... Fuel PASSAGES inside the carb off and clean it out with carb cleaner and on. 18, 2019: my question concerns a Homelite 96SS ( UT32651 ) String trimmer Need! Is no secret and will make or break you, i 'm usually pretty about... Two-Cycle engines as well as ones with four-cycle engines, and it looks.! Not the fuel PASSAGES inside the carb are MINUSCULE!!!!!!!!!!... Damage/Corrosion, first remove the wire and connecting harness from the spark plug for signs of or!
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