Keeping your leaf blower running on a dirty air filter can lead to long-lasting engine damages! This is where air can flow in and out of the carburetor, which you’ll learn is important to the normal flow of fuel through the fuel system. Engine Only Runs with Choke On or Pressing Primer. Allow the engine to run for 10 seconds or so, and then move the choke lever to the "Run" position. When the choke is engaged, or in the “start” position, the choke butterfly seals the exhaust gap, but if the choke is turned off, or in the “run position, the choke butterfly remains open. No holes in the line. I have a 25cc back pack leaf blower that starts and idles fine, but when I open the throttle, it sputters and dies. Seems like a fuel supply problem. Hey all. Joined May 22, 2006 Messages 122 Age 42 Location Duluth, MN. Then, turn it counterclockwise until it slows again. Mu trimmer starts but will not run when I shut the choke off. Total blockage of the breather valve won’t allow the leaf blower to run, even is the choke is engaging, but a partial blockage will because only a small vacuum will form in the fuel tank, limiting but not starving the engine’s fuel intake. The most common repairs for this device are straight forward and can be done quickly. My 2 stroke blower only runs on idle or full choke. Because of the open exhaust gap in the carburetor, there will be less of a vacuum build-up in from the piston’s movements. One of those is the fuel filter. Check the fuel speed control valve in the carburetor. It will start right up and run fine for about 20 seconds then start to die out. Homelite products website The best leaf blower for small yard. Echo PB-580T Backpack Leaf Blower: Time has gone when an idea of getting a blower was something like for only the people with a big chunk of property. As the pistons begin to cycle up and down, these movements physically draw fuel through the carburetor’s fuel line as the engine pistons create an air vacuum (source). Product recommendations not personally owned are based on the author’s knowledge of the company, product, reliability, and reputation. One batch of bad gas with crud in it will do it or leaving gas in the carb for a year or so I let it warm up until it started to labor a bit and then tried to If your chainsaw only runs with the choke on, it is likely an issue with your carburetor. This process is pretty simple. When I changed the gas, it started doing something different. Some models might need up to 30 seconds of running with a partially closed choke. Make sure your air filter is clean otherwise it may be limiting air flow and riching up the mixture to much. Aside from the many parts on the tiller that need freshening up due to age and wear, the engine also wont run. CHOKE - Choke is located on the side of the air cleaner. The compression of the engine’s pistons allows fuel and air to flow through the carburetor in specific ratios for each cycle (source). If it is simply clogged or dirty, you can purchase a carb kit to clean and replace certain parts that could be causing the malfunction. If the spark arrestor is clogged, the engine may stall. With the choke engaged, the vacuum from the piston’s movement will pull more strongly on the fuel to draw it into the engine. The engine starts, then the engine dies. I was recently given an Echo PB-500T blower. Move the choke lever to the middle or "half choke" position and pull the cord to start the engine. I had a Echo Leaf Blower that would only run with the choke on. Thus, if the weed eater refuses to run with choke off, you can also decide to loosen the gas cap. 10-04-2010, 07:47 AM #6. john4153. A little adjustment on the screws and it would take off. If your blower only runs with the choke on, you probably have an issue with your carburetor. Runs … If your Poulan chainsaw still only runs with choke one, then look for the next step. I finally took it apart and it turned out to be a rotten fuel line from the tank to the carb. 99% of the time needing partial choke to run means a jet is clogged or restrcited due to crud. All I do is put fuel in it then put it back in the shed till I need to use it again. Homelite products website The best leaf blower for small yard. Turn the L screw clockwise until the engine slows. It is used to make a cold engine easier to start. On full choke it runs about 75% of full throttle. After this is done close the choke, but leave it open halfway between the open and close mark. Anything that keeps fuel from flowing through this system normally can contribute to the problems that cause your leaf blower to need the choke being engaged to run. There can be a number of underlying issues but these are common causes and each of them has a fairly simple solution. Checked the fuel filter and fuel line. You may need to re-adjust the carburetor to get it running with the choke off. Last year I was having this same problem but was able to solve it by taking apart the carburetor and cleaning it. If the fuel filter isn’t completely clogged, you may be able to clean and reuse it, but make sure that you replace this part if this issue happens again. I have 2 of the same go karts and I swapped the carbs to make sure that was the issue and it was. Improper air penetration will cause other symptoms like rough idle, fluctuating engine RPM, etc. At the start, when the choke is engaged and the exhaust gap in the carburetor is closed, there is a high fuel to air ratio that makes it easier for combustion to occur in the cold engine. It is used to make a cold engine easier to start. If i pull in the trigger all the way it will sputter out. Why does my leaf blower only run on choke? I have a Stihl FS45 trimmer that runs great, if I leave it on half choke. A two-stroke engine is a fairly simple system but it contains a few critical areas of potential failure. Gasoline now adays only has a maximum 3 month shelf life before it starts to deteriorate. TO keep the engine running if I have to keep re-adjusting the cold start/run choke. Read and understand this manual. About Echo gas powered leaf blower. Turn the choke off and assess. Had this blower since 2010 when it was a replacement for an older Echo blower that was stolen from my garage during a break in. I can't do that when the blower is on m … read more 01 - Spark Arrestor. RIX. What is wrong? Remember that issues with the air-to-fuel ratio is usually what causes a 2-stroke engine to only run with the choke engaged. Owner #2 more or less just let it sit for 2+ years. Amazon has put together some great Home Holiday Guide Deals - save money and get your holiday shopping done! Always use common sense when working with a gas-powered engine. I have an Echo PB200 blower that will start but dies when the choke is opened. It runs at a midrange rpm, not idle but not wide open either. Sep 21, 2017 • FAQ. If a leak is identified, do not use the leaf blower until you replace the line or have it professionally serviced. Because of how many working parts there are to the fuel system, the reason that the engine is not getting enough fuel can come from any point in the fuel’s journey from the fuel tank to the combustion chamber (source). I just can’t figure out what is wrong with the carbs that won’t function right. Move the choke lever to the middle or "half choke" position and pull the cord to start the engine. If your carburetor is clogged, it can cause your leaf blower’s engine to die when the choke is disengaged. POWER BLOWER 3 OPERATOR'S MANUAL SAFETY DECALS Locate these safety … PROBABLE CAUSE: Air is getting through place(s) other than air filter. 2. Eye Protection --Wear eye protection that meets ANSI Z87.1 or CE requirements whenever you operate the blower. Only thing wrong is the little switch to switch choke on off is half the size. Evidently starving for fuel. If you need specific repair instructions related to your model, refer to the manual provided by the manufacturer. It runs with the choke on and then it surges when you turn the choke off and then it dies. I have checked all fluids and recently changed the oil. As before, now turn the screw the other way until the engine slows again. Jul 13, 2007. Make sure your air filter is clean otherwise it may be limiting air flow and riching up the mixture to much. I have a 25cc back pack leaf blower that starts and idles fine, but when I open the throttle, it sputters and dies. 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