Tighten all screws and nuts tightly. Leaf blower won't stay running. Report This by Manage My Life. Just because your leaf blower won’t start doesn’t mean it needs to be replaced completely. Thriving Yard is a privately owned website. SHOP PARTS. A. This site is a participant in affiliate programs such as Amazon Associates and earns from qualifying purchases. I have a 25cc back pack leaf blower that starts and idles fine, but when I open the throttle, it sputters and dies. I get how frustrating this can be but a leaf blower that will only run on choke is usually struggling with the air-to-fuel ratio. A clogged carburetor is most commonly caused by leaving fuel in the leaf blower for a long period of time. 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. He knows exactly what the challenges are to nurturing a thriving yard in difficult soil. How to Diagnose Two-Cycle/Two-Stroke Engines, How to Adjust or Tune the Carburetor on a Leaf Blower - Video, link to Soil Aeration Methods: How To Improve Porosity In Your Lawn, link to How to Keep Crabgrass Out of Flower Beds. 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. 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. These diaphragms can warp after several seasons of use. It sounded like the engine was very weak. Click Here to see the latest deals (link To Amazon). Leaf blower running rough. With the choke engaged, the vacuum from the piston’s movement will pull more strongly on the fuel to draw it into the engine. Or it might even run rough. I have a Ryobi BP42 Leaf Blower. A lot of times the nuts or bolts that hold the 'jug' on the crank case come loose allowing too much air in the cylinder causing too lean a fuel/air mixture and hence having to run it on choke all the time. I have a Ryobi BP42 Leaf Blower. Depending on the different symptoms you will need to troubleshoot, so that you don’t have a dispensable leaf blower in your hands. Have a blower that starts but won't run off half choke ... hello, my Ryobi leaf blower (back pack type) pull cord is stuck. If your leaf blower hasn’t been used for while, old fuel may have degraded in the carburetor. In most cases, it just requires a little maintenance and it will be back to running like new. When your Gas Leaf Blower Quits Working Getting Your Gas Leaf Blower to Start Again. 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. There can be a number of underlying issues but these are common causes and each of them has a fairly simple solution. After refueling it will only run for about 5 to 10 seconds and then stops. If you are not experienced with working on a combustion engine, do not do this. This warping will cause the fuel to stop moving through the entire circuit, and the engine will shut off. 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. 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. It turned over, but wouldn't start, no matter where I set the 3 position choke. 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. If the rings leak either way the engine will not run If the exhaust is blocked (mud pluggers) the engine will not run If the barrels are scored the engine will not run It will leave a sticky residue which prevents the engine from starting. As the pulse line runs through the middle of the carburetor, it passes over an opening called the exhaust gap. If the carburetor is clogged, try cleaning it with carburetor cleaner. Common Solution. Here's a routine to check your leaf blower from plug to mouth. Ryobi 2 cycle leaf Blower repair. Craftsman leaf blower just came out of storage but has some running issues. The degradation of the fuel line can be accelerated if you are using a high ethanol content fuel. The choke is off and the gas is new (few months anyway). If old fuel was left in the leaf blower, drain the old fuel from the fuel tank and replace the fuel filter. Ryobi gas blower /vacuum. If the air filter in your leaf blower is partially plugged, it can cause your engine to run, but die at full throttle. 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. What to Do When a Ryobi 4-Cycle Trimmer Won't Start. 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. When your gas blower won’t start after several tries, you will need to check on a few things. Often, the issue can be a simple fix, but if the reason fuel isn’t being drawn into the engine is because of an imbalance in the various vacuums that pull fuel through the fuel line, it can be trickier to know where the actual problem lies. 11 possible causes and potential solutions . If the crankcase seals do not hold pressure & vacuum the blower will not run. If a leak is identified, do not use the leaf blower until you replace the line or have it professionally serviced. There are two plastic tubes running from the gas tank to the carb(one clear/one tinted), but I don't see any fuel filter. 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. 32cc, 170 MPH, 360 CFM. Depending on the model of your leaf blower, there will be screws on the carburetor that allow you to fine-tune the air-to-fuel ratio. Starts but won´t stay running... has all attachments including leaf vacuum bag. The Right Parts for the Job. Unlike corporate website companies, the authors on this website regularly use many of the tips and recommendations provided in their own garden and lawncare. Enter model number to search for the required part specific to your product. Stale fuel is the most common reason why a leaf blower won’t start. 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. I replaced the lines properly. Start doing it yourself with the confidence that comes with 100+ years of experience. Rotate the idle speed screw clockwise until the blower starts blowing on its own. 05 - Air Filter. Final Words on How to Fix a Leaf Blower That Won’t Start. Paul has a two-acre yard on red clay soil in Southeast Texas. Turn the idle speed counterclockwise again until the blower stops. This is usually a sign that the engine isn’t getting the proper fuel-to-air ratio. 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. 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. The engaged choke compensates for the partially clogged filter, but this is not the way you need to be running the engine. No Video Available. Check the Spark Plug. Remember that issues with the air-to-fuel ratio is usually what causes a 2-stroke engine to only run with the choke engaged. About 7 years old, very few hours on it. The air filter may be clogged or dirty. Steve’s Small Engine Saloon has an excellent video demonstration on this process. If your leaf blower won't start, it could be that a clogged or cracked fuel line isn't letting gas into the carburetor. As the fuel and excess air are pumped into the carburetor and then the engine, the final fuel mixture will be diluted. … read more. The carburetor might be clogged. Location: Mi-Wuk Village; Read more... blower vacuum Ryobi leaf Sponsored Link The case, the problem and what should i try company, product reliability. Engine, do not hold pressure & vacuum the blower starts blowing its... 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