You’ll need to drain all the fuel from the system. Read more. This issue is similar to reported problems of blowers bogging down, losing power or keeping stalling at full or increasing throttle. Unfortunately, a saw that won't keep running often has a carburettor problem that requires a visit to a repair shop. Can't pull cord. Another cause could be that there is a leak in the fuel line that is limiting the amount of fuel that reaches the combustion chamber. This site is a participant in affiliate programs such as Amazon Associates and earns from qualifying purchases. Browse our parts categories to select from a variety of parts for your product. I Took it apart found the fuel lines disinigrated. If the breather valve is blocked, then a secondary vacuum is created within the fuel tank that pulls on the fuel in the opposite direction of the vacuum in the carburetor. 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. Replace the leaf blower fuel filter. With the choke engaged, the vacuum from the piston’s movement will pull more strongly on the fuel to draw it into the engine. If your leaf blower hasn’t been used for while, old fuel may have degraded in the carburetor. Always use common sense when working with a gas-powered engine. leaf blower Wont stay running. My Ryobi 340BV blower ran fine all during the fall. If you are not experienced with working on a combustion engine, do not do this. Amazon has put together some great Home Holiday Guide Deals - save money and get your holiday shopping done! 39,107 satisfied customers. No Video Available. To really get a good understanding of the combustion process of a 2-stroke yard tool and some great troubleshooting tips, watch this video from eReplacementParts: The reason it’s important to turn off the choke once the engine is warm is that a lower fuel to air ratio allows for more efficient use of gasoline. That still doesn’t mean that the engine will run well under these conditions, so you should examine your fuel line for any noticeable leaks. Three common reasons for this are: Understand that these are not the only reasons why your leaf blower engine may not run unless the choke is on. If you notice one of your blower’s gaskets are damaged, they will usually … November 1st, 2012. Here's a routine to check your leaf blower from plug to mouth. If this is the reason your leaf blower won’t run without the choke tank cap or breather valve need to be replaced. Have a blower that starts but won't run off half choke ... hello, my Ryobi leaf blower (back pack type) pull cord is stuck. Technician. Tighten all screws and nuts tightly. The porcelain insulator can get cracked from an electrode that has burnt out or eroded. Spark plugs can become damaged, corroded, or gummed up for a variety of reasons. A. a1handy OP newbie a1handy OP newbie. If this is the case, the blower may start up as usual, but then immediately stall out. This means emptying the gas tank and flushing fresh fuel through the gas pipes. Required Part. 6 possible causes and potential solutions . I have a model # 358.797340 25cc 205mph craftsman leaf blower/sucker. Carb needs a rebuild kit. Starts but won´t stay running... has all attachments including leaf vacuum bag. If you can hear air flowing in quickly after you release the cap, that would indicate that a vacuum had been created due to a blockage of the breather valve. When the leaf blower’s engine is started, the pistons within the engine start to lower and pressure is transferred from the engine compartment through the carburetor, which pushes down on the fuel pump diaphragm on the pulse line. Seems like at one time these two lines came off. Click here for Paul’s author page, Soil Aeration Methods: How To Improve Porosity In Your Lawn. Over time, some of the ingredients in the fuel may evaporate..., leaving behind a thicker, stickier substance. When your gas blower won’t start after several tries, you will need to check on a few things. This is usually a sign that the engine isn’t getting the proper fuel-to-air ratio. Leaf Blower Won’t Stay Running. 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. Reason 3: A Fuel Line Leak. Already ordered? That’s why it’s important to know what problems to look out for as well as which ones you can prevent with proper maintenance. Gas Snowblower: Won't stay running If your engine only runs for a few seconds and then shuts off, you could have a gummed-up carburetor. Location: Mi-Wuk Village; Read more... blower vacuum Ryobi leaf Sponsored Link To test if this is what’s causing your leaf blower to only run on choke, run the leaf blower for a few minutes with the choke engaged and slowly undo the fuel tank cap and listen for air rushing into the fuel tank. We've got millions of parts, hundreds of brands, and thousands of step-by-step videos— everything you need to find it, fix it and finish the job right. The choke is off and the gas is new (few months anyway). If your leaf blower won't start, it could be that a clogged or cracked fuel line isn't letting gas into the carburetor. Most homeowners and lawn maintenance professionals... Crabgrass is an annoying, creeping, annual grass that can quickly invade lawns, flower beds, and vegetable gardens. Ryobi 2 cycle leaf Blower repair. The engine probably starts because gas enters the cylinder when you press the primer bulb. Joined: Aug 2009 Posts: 22: I have a two stroke leaf blower that starts easily and runs great for about 3-5 minutes. It’s difficult to improve the soil in an established lawn without tearing up the grass and starting over, which is expensive and time consuming. If cleaning the carburetor … It runs great - IF you can. Just because your leaf blower won’t start doesn’t mean it needs to be replaced completely. A McCulloch chain saw that won't keep running may have a major problem. Curtis B. I shut it down for a few minutes and it wouldn't start back up. I have a Ryobi BP42 Leaf Blower. You can quickly fix this with a fuel filter replacement if you find the filter to be the issue. When fuel leaves the fuel tank of your leaf blower, it passes through the fuel filter before entering the carburetor and then eventually engine and its combustion chamber. The resulting mixture in the combustion chamber will have a lower fuel to air ratio, which is a better mix for the engine to run on when its warm. If this is the reason your leaf blower won’t run without the choke tank cap or breather valve need to be replaced. I can get it to start just fine and it will go to full RPM when I hit the throttle but weather it is full throttle or just idle, it will kill after about 5-7 seconds or so every time. Leaf blower starts then dies. It’s possible that this ratio needs to be adjusted in the carburetor itself. If there isn’t enough fuel for the engine to achieve combustion, the engine won’t be able to power the leaf blower efficiently and will sputter or completely shut off without the choke engaged. It sounded like the engine was very weak. Why does my leaf blower only run on choke? Remember that issues with the air-to-fuel ratio is usually what causes a 2-stroke engine to only run with the choke engaged. If the carburetor is clogged, try cleaning it with carburetor cleaner. I’ve heard a lot of people argue that this is incorrect – that choking the engine won’t increase the fuel flow if the filter is obstructed, but that’s not what the choke actually does. I have a 25cc back pack leaf blower that starts and idles fine, but when I open the throttle, it sputters and dies. The first repair in two years. At best, it will run at half throttle, but never at peak rpm. 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). To replace a fuel filter, follow the following steps: Start by draining the old fuel that might still be in the tank. When the choke is in the “off” or “run” position, the choke butterfly opens up, which allows more air into the carburetor. So the first thing on our list is the first thing you should check if you’re trying to figure out how to fix a leaf blower that won’t start. Check the Spark Plug. The carburetor inside a leaf blower uses several plastic diaphragms to bring fuel into the carburetor, mix and measure the fuel and send it off to the cylinder. Craftsman model #358.797342 - It ran ok approx 1 week ago and then it ran out of fuel, 40:1 ratio. Report This by Manage My Life. Paul has a two-acre yard on red clay soil in Southeast Texas. About 7 years old, very few hours on it. If these gaskets are damaged, they will not be able to form a seal, and can let excess air into the engine, causing it to run lean. As the piston keeps cycling, the diaphragms in the carburetor move up and down to pull the fuel through to the engine at a consistent rate to allow combustion to efficiently power the leaf blower. Reinstall carb and fuel lines and air cleaner. My Ryobi 410r 31cc starts but will not keep running I have installed a new and it run for about 2 hours and will now - Answered by a verified Technician . No Video Available. As the fuel and excess air are pumped into the carburetor and then the engine, the final fuel mixture will be diluted. If old fuel was left in the leaf blower, drain the old fuel from the fuel tank and replace the fuel filter. I have a Craftsman Blower/Vac Mulcher. View solutions. Rotate the screw clockwise again to the highest engine speed before the blower starts working. Gas powered Leaf blower problem - It will not stay running. What could be the problem and what should I try? An overheating problem in the leaf blower is generally caused by a failure to vent gases or the fuel burning too hot inside the cylinder. The fuel pipes are made of rubbery plastic which can degrade and leak fuel as well as draw in air through any gaps. If the fuel filter is partially clogged with debris or dirt, the fuel filtration rate into the fuel line and carburetor will be limited. Leaf Blower will cuts off after 2-3 minutes #577279 11/20/09 06:55 PM 11/20/09 06:55 PM: Joined: Aug 2009 Posts: 22. Other than the causes mentioned above, your leaf blower might not start if the engine is at fault. Click Here to see the latest deals (link To Amazon). That means less fuel will be pulled into the carburetor. Towards the end of the season, I had started it multiple times over the course of a couple of hours, so it was fully warmed up. 5 possible causes and potential solutions . If the crankcase seals do not hold pressure & vacuum the blower will not run. Unlike corporate website companies, the authors on this website regularly use many of the tips and recommendations provided in their own garden and lawncare. Ryobi gas blower /vacuum. String trimmers are versatile tools in any homeowner's arsenal. Start doing it yourself with the confidence that comes with 100+ years of experience. Enter model number to search for the required part specific to your product. It will leave a sticky residue which prevents the engine from starting. The fuel filter is located at the end of the fuel line inside the gas tank. Email, 11 possible causes and potential solutions, 5 possible causes and potential solutions, 6 possible causes and potential solutions. Most leaf blowers have gaskets between the carburetor and the insulator, as well as between the insulator and the cylinder. After refueling it will only run for about 5 to 10 seconds and then stops. 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