There should be a limit screw or something to prevent a full closure. Check the choke valve and see if it is closing fully in the carb throat when you close the choke lever. 11/09/2018 by … On most dirt bike carburetors, the choked (rich) condition is set by adding more fuel, instead of restricting air. How do I dispose of it? get a spray can of berrymans B12, a set of carb tools and have some fun, don't lose any parts. Fuses or circuit breakers? The inside wasn't as bad as anticipated. Engine would only run with choke closed. It might have debris, grass, or twigs in the way keeping it from moving properly. If that happens, you need to check either of two things-- the choke position and the air filter. When I start my lawnmower with the automatic choke on, it will start but as soon as the choke turns off so does the engine. M ... Hey guys, just rebuilt a carb that sat for a couple of years. Then, when you turn the choke off, it becomes much too lean and will not run. The brass nut is actually the main jet. dish soap ratio is no problem.? If your lawnmower will start and run with the choke on but dies when the choke is turned off, it may have a problem with the carburetor. When I turn it off, seems like it runs out of gas....turn it back on, it starts back up. engine in a snowblower that does the same thing. pull that can off and then blow out the little screw that holds the can on. By the way, don't forget the clamp the fuel line or you will lose all your gas. slow jet/idle jet is clogged, prob in the passages ?. When the choke is "turned off", the choke baffle opens and reduces the amount of fuel passing through the carburetor. Should only open it up about half way to start, and then be able to turn the choke off totally withing a couple minutes. Never ride with it half way open, you are flooding your engine and plugs, that's probably your problem. There should be a mixture screw on the carburetor. However, you start it up on choke and everything is fine until you turn the choke off, and the engine dies. Then after you have cleaned the carburetor, start the engine and slowly turn the choke off. Link to post Share on other sites. JavaScript is disabled. :-( this was my first carb rebuild so lord only knows what could've went wrong... Any suggestions as to possible problems and their solutions would be greatly appreciated. Please can someone help me locate either the website to order the 2 missing panels or the maker of my chandelier? ? If the engine is still running, that means the gas cap may be the culprit. Go to top ; Share this post. Jump to Latest Follow 1 - 5 of 5 Posts. My snow blower will only run with the choke in the on position. Very little "shellack" inside. Move it back and forth making sure it moves freely. When your trimmer starts and runs on choke, it could be because the check valve in the gas cap is clogged. If your pressure washer shuts off when the trigger is released, it has a problem with the unloader valve. This is a classic symptom of a partially or fully clogged pilot jet. Turn on the ignition of your car. Some times a back fire into the carburetor will blow a pressed-in BB out of a drilled passage way. You will not know if the BB is missing cause it will look like another hole in the carburetor. Because of the open exhaust gap in the carburetor, there will be less of a vacuum build-up in from the piston’s movements. Replaced all the jets. It could be an air leak somewhere causing the engine to get too much air. Is there something I should adjust? We’re a forum community dedicated to Honda ATV owners & enthusiasts. '89 trx350D foreman 4x4...'85 vf700c magna, '03 trx450fm foreman 4x4 , 2015 Yamaha waverunner fx cruiser ho, '08 vt750c2 shadow spirit :icon_gd: If it's not the carb, then it's probably an intake air leak somewhere between the carb and the cylinder head. So, when your bike only runs on choke, it is because the “rich” mixture that is being burned is actually closer to the appropriate mixture. Hi Brian. clean/replace the air filter and watch ol' gal start like a new penny! Its just every 15 seconds or so you need to give it a slight rev or it will die. topsites LawnSite Fanatic. Which is better for a home? In most cases, this is due to a clogged fuel supply, often the main jet or emulsion tube. Or it might be that its not getting enough fuel, in which case you may need to take the carburetor apart and clean it. just a few suggestions. Once the engine is warm, you can remove the air filter and check whether the choke is open or closed. Snowblower engine would not run with choke off (choke open). At that point the choke is turned off and the engine runs with a leaner fuel/air mixture. Hey guys, just rebuilt a carb that sat for a couple of years. Still have questions? It's pretty clean as far as I can tell. There are a few issues with your unloading valve that causing stalling the engine pump. Get your answers by asking now. So we turn off the engine and clear the smoke, and pull out the cable as best as we can. Once you close the choke, reinstall the air filter and housing onto the carburetor. Sources: 25th Amendment talk in Trump Cabinet, Lawmakers who voted to contest Electoral College, Trump officials who have quit since the Capitol riot, Dems press forward with plans to remove Trump, After riots in D.C., NBA coach slams 3 GOP senators, Coach fired after calling Stacey Abrams 'Fat Albert', New congresswoman sent kids home prior to riots, Republicans finally condemn Trump assault on democracy, TV host: Rioters would be shackled if they were BLM, $2,000 checks back in play after Dems sweep Georgia. The 2005 trx300ex fires right up with the choke on let her warm up, turn choke off and she dies. The 2005 trx300ex fires right up with the choke on let her warm up, turn choke off and she dies. When I take the choke completely off, it shuts down. Please use extreme caution when dealing with fuel. My Weed Eater Stalls on Full Choke. Engine dies when choke is turned off. Any suggestions? Troubleshooting of this problem is pretty simple and you can do it yourself easily. Just caught a mouse on a sticky trap. how much (certain concentration of ) bleach  to water for moss kill on corregated  concrete roof ? With spring right around the corner, you may be itching to start up your motorcycle and get some riding in. So that was fun. Your pilot circuit is obviously not doing its job. 0. The choke is designed to only provide a rich fuel/air mixture for a short period when the engine is cold. The air/fuel mixture takes over and keeps the engine running. Note its position, and turn it counter-clockwise 1/8 of a turn to see if there is any improvement in engine performance. there is a little silver can on the base of the motor. goldenmember 1,000 Post Club! The engine is not the same but it will give you an idea on how to do this. Turn the choke off and assess. Put choke back on and she fires right up. If the engine stalls under load, the mixture may be too lean. Start the trimmer and gently unscrew the gas cap halfway off. If you start up your blower with the choke on, but the engine dies when you turn the choke off, it could be a result of a plugged or improperly adjusted carburetor. If the engine does not idle then remove the idle screw, and the plug or screw below it. I will give you the short answer, the carburetor needs to be cleaned. Well if its a push mower, you may need to take off the shroud cover and check the air fin for the governor. I have provided you with an image showing the break down of the carburetor. Thanks. main jet clogged with crud,... its running off rich (choke) jet. It was my dad's and he bought it new. The choke increases the amount of fuel in the mixture, creating a richer mixture. If it’s dirty, you can follow the tip we gave above. Move it back and forth making sure it moves freely. Let off the throttle and it dies pretty quickly. HOWEVER! It might have debris, grass, or twigs in the way keeping it from moving properly. Once the engine is running, spray starting fluid in that area and listen for a change in idle speed. What gives? Often when you need the choke on or partially on to run the engine (two-stroke) this indicates the filter because the choke is restricting air-flow and pulling in more fuel. blow out the plug and passageway reassemble and that should fix the unit not idling. If I back off on the choke the engine stalls, like it is not getting any fuel. Shouldn't have to open it fully to start, especially on a Honda, Honda's are good cold starting bikes. How do you think about the answers? 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. Thanks! That means less fuel will be pulled into the carburetor. Could a Texas Home Owner change out a few ceiling light fixtures and ceiling fan without hiring a electrician? Join Yahoo Answers and get 100 points today. To this day, it never runs without the choke on. How Can I tighten up suction cups on a medical reacher. Help!!! Repeat this but don't exceed about a half turn. BST Users It never worked right, he had it repaired under warranty, later the carb was rebuilt by a mower shop, then I rebuilt the carb a few years later, as well as changing the filter and in tank pickup tube. Remove the brass nut under the carburetor's bowel and blow the crud out of the holes. it's where the gas goes in. You might have to adjust the maximum throw of the choke cable to keep this from happening. There is a big puddle of this stuff caked on the tube. Any help would be great! The engine has to … I liked that I could ask additional questions and get answered in a very short turn around. You can sign in to vote the answer. For a better experience, please enable JavaScript in your browser before proceeding. Not really a back fire per se but popping. My son's PW 80 will not run unless the choke is on. For the air filter, you need to check if it’s clean or damaged. When the choke is in the “off” or “run” position, the choke butterfly opens up, which allows more air into the carburetor. This is a classic case of main jet clogged. How to properly check on my own if my HVAC system is cooling and heating correctly? At this point, the choke should be open to allow the engine to breathe fully. But here is the good news! check any fuel lines or bulb pump for cracks or tears that might be causing an air leak. it will have a tiny hole in the screw. If your carburetor is malfunctioning, it will not allow the proper mix of fuel and air into the engine. is not in any way affiliated with Honda Motor Company. Starts but stalls when choke is off or high idle My 2 stroke engine starts fine with choke and high idle but stall when you take either off Posted by Wayne Pittuck on Jul 07, 2019 Leaving the choke on while operating will result in excessive fuel consumption, irregular engine power performance and eventually may even damage the engine. When your engine stalls, there is a huge possibility that the engine will smoke.