Carburetor spit back. one family owned and stored in a shed since 1969).
Carburetor spit back. Oct 26, 2023 · These include the fuel pump, the float, the needle, the choke valves, and the air filter. Fuel tank > petcock > carb bowls > accelerator pump (if applicable)/jets > intake manifold > intake valve > cylinder > exhaust valve > exhaust pipe. The article covers how to identify the problem, how to ensure proper operation of your carburetor, and how to prevent issues in the future. When a 2-stroke engine spits back through the carburetor, it is usually due to the rapid opening and closing of the reed valve. Backfiring through the carb will happen if your intake valve is still open a bit when the plug fires, allowing the flame front to travel into the intake manifold and through the carb. Air screw is about 1 1/4 out. Mar 23, 2022 · Most single cylinder engines experience 'spit back' due to the cam grind - the intake valve starts to open before the piston reaches TDC so for about 20 degrees of crank rotation the piston is coming up and the valve is opening, but spit back above idle indicates a problem usually within the carb - float level too high, float needle not shutting off fuel or float needle seat o-ring failed and May 16, 2021 · I'm looking at the fact that it did run before without spitting and trying to get it back to that point. I would suspect an intake valve is hanging a bit allowing pressure back through the carb. Anything else I should look for? Whether you’re dealing with poor idling, sluggish acceleration, or backfiring, identifying the root cause in the CV carburetor can make all the difference. The vehicle is a 70 El Camino SS 396 with a Jan 12, 2020 · The most likely cause of gas spitting from the golf cart valve is due to the needle valve in the carburetor of your cart not working properly. Wayne May 26, 2020 · Spitting back through the carb is symptomatic of several things including a sticking inlet valve. First thing that came to mind was a partially sheared flywheel key, causing the engine to be a little out of time. Is it running rich or lean? Missing? May 2, 2010 · What causes my carbs to spit fuel out of the carb throat? It's a '92 70 hp evinrude. any advice? today we diagnose and fix a Briggs motor that's spitting and backfiring #briggsstratton#ridingmower#fix Jan 14, 2013 · Spitting back through the carburetor, off idle, can sometimes be a sign of an overly lean idle mixture. Nov 27, 2024 · Learn the causes of a carburetor spitting out gas, including faulty float valves and clogged air filters, and discover effective solutions to fix the problem. Let’s dive into the essentials of CV carburetor troubleshooting, so you can get back to enjoying the ride without a hitch. I can just barely get it fired by holding the throttle open. This often overlooked aspect of maintenance should be done at least once a month. This cause is a bad float needle valve. Fuel Spit Back System (Kohler CV730-0029) - DoItYourself. It could be a weak mixture too, or a sticking carburettor piston. Use either a tune up tach that will show precise rpms at low speeds, or a vacuum gauge, and adjust each screw, one at a time, to achieve maximum idle speed or vacuum reading. The timing is right (ignition and valve) and the car runs like a dream when warm. Aug 19, 2006 · so as you give the tired moto more throttle it tends to spit back through the carb because it has become inefficient from excessive wear,, which in turn causes the airfilter to get soaked and the motor can actually run too rich,,, become hard to start fouls plugs,,, etc. This can occur on any model, any carburetor, but seems to happen most often with the stock CV Keihin carburetors used on the newer (90 up) Big Twins and Sportster models. Oct 13, 2011 · While in the cut, the saw bogged as if it was getting too much fuel. If there is a lot of venting from the Feb 10, 2023 · Learn about the causes and possible solutions for a carburetor that is spitting out gas. This valve is responsible for allowing the fuel-air mixture to enter the engine cylinder. Understanding these causes is pivotal for maintaining your vehicle’s health and performance. etc. Dec 17, 2018 · This is something I've not run across before, at least in a piston ported saw. If you spit the instant you blip the throttle, then it's probably the accelerator pump in the carb not working, or not squirting enough fuel, so the engine takes a gulp of air and goes lean, which causes the spit back-up through the carb. Carburetor spit back when accelerating #364194 03/10/16 12:56 PM Joined: Dec 2015 Posts: 21tennessee, usa rsh47 OP Grease Monkey OP rsh47 Grease Monkey Joined: Dec 2015 Posts: 21tennessee, usa My friend and I soaked/cleaned and rebuilt my Carder carb. it runs and idles Jul 14, 2004 · HELP I changed the carb on my Lincoln welder. it runs and idles Aug 16, 2010 · Re: Reed Valve? Fuel spitting from carb Re: Reed Valve? Fuel spitting from carb fuel spitting from the vent hole in the top of the carb is due to float height being wrong or a bad inlet needle valve. Jul 2, 2020 · I rebuilt the carbs with the carb rebuild kits, and cleaned everything, and replaced all screws. Spitting fuel out of the intake suggests a significant excess of fuel getting past the carbs, either through the carbs themselves or by a stuck-open vacuum petcock. it runs and idles Carburetor spit back when accelerating #364194 03/10/16 11:56 AM Joined: Dec 2015 Posts: 21tennessee, usa rsh47 OP Grease Monkey OP rsh47 Grease Monkey Joined: Dec 2015 Posts: 21tennessee, usa My friend and I soaked/cleaned and rebuilt my Carder carb. Jan 6, 2004 · One of the most common problems that customers complain about is the spit-cough-pop from the carburetor as a Harley goes from idle to ¼ throttle. Apr 13, 2011 · I noticed that when the air cleaner is off and the engine is running, fuel seems to be spitting out of the front of the carb (standard NT). Understanding the Harley Davidson Cv Carburetor Mar 12, 2017 · Post ReplyForum -> Not-So-Modern May 24, 2012 · hello, so I have (what I believe to have) 1999 Murray with the 16. If the exhausted gas feels hot then suspect that the cam is 1 tooth advanced If it is cold then suspect cam 1 tooth ********. Get ready to dive into the world of Harley Davidson CV carburetor troubleshooting. hooked to a charger and started up. However, a malfunctioning carburetor can lead to various issues, including a chainsaw blowing fuel back. It starts right back up with a single kick. Have you tried to start it and let it idle with the muffler off? Perhaps the muffler is restricted by carbon build up. Jan 16, 2017 · So the needle will spray into the carb towards the intake, but the fuel blows back and I can't determine if the choke jet is spitting it out or there is backpressure. Though this might sound (and feel) incredibly intimidating, you should know that it is a relatively common occurrence with ATVs. it runs and idles Jan 29, 2010 · Hey guys, I just installed a cam and set of heads on a 350. I rebuilt the WA carb a month ago, so need to check my work there. Remove the air filter & any air horn then secure the carb. Jun 10, 2013 · There is a condition called "standoff" that blows fuel vapor (and it is very visible) out of the carb throat. wouldnt hurt to check the plug again. I was told it ran fine last year, and just picked it up it needs a few things. An issue with any of these working parts of the carburetor can upset the Air-fuel ratio and cause gas to escape from the intake. Q: What are the consequences of a lawn mower spitting out gas? Nov 23, 2016 · If it has a VOES, change out that hose too. I took the breather off and tried to crank it and gas is blowing out the Feb 10, 2023 · Having issues with your carburetor spitting out gas? Learn how to troubleshoot and fix this problem with our easy to follow guide. On the older engines with points I would see a condenser going out, or be loose on the connections and cause backfiring; but you don't see those old points and condenser units much any more. Pull the muff, put yer earplugs on, and fire it up and see if it continues to spit back. I have tried between 3/4 and 2 1/2 turns o Oct 16, 2010 · Fuel Blow BackFuel Blow Back Started by jteneyck, October 16, 2010, 07:25:30 PM Previous topic - Next topic 0 Members and 1 Guest are viewing this topic. That can be caused by incorrect valve adjustment or by incorrect timing. Why The Carburetor Is Spitting Out Gas So why is your motorcycle spitting gas out of the carburetor? As we previously mentioned, there is one main cause that usually leads to this. I Sep 17, 2019 · Drips at the Carburetor updated September 17, 2019 Two stroke engine carburetors will drip fuel, especially when at or near idle. Mar 29, 2006 · Ok, here is the story. Remove the carb and spray carb cleaner into the small hole on the intake side of the closed throttle plate to clear the idle circuit. Perhaps there was a failing part that allowed it to run smoothly with a short throttle blip to 2500? Jan 2, 2014 · 1978 - 1996 Big Bronco - 83 Bronco Carburetor Spit Back - I have recently purchased an 83 bronco with 302 and auto transmission. Install bigger jets if you have them, but also try adjusting the idle mixture screws. 5 vtwin. Jun 21, 2013 · Why does my 2003 Fatboy cough and backfire through the carb? It only does it every so often. Apr 26, 2018 · Re: Stihl BR340 backpack blower spits back out the carburetor I want to read replys to this as well so thanks for posting. Jan 25, 2014 · Carb Spitting Back - posted in Problems, Questions and Technical: Hi, having a slight problem with my engine, its a 998 from an 84 mini, I am getting a spitback from the standard carb, its only when I first press down the throttle at low revs, and it doesnt happen when the choke is on , I tried changing points and condenser but it is still the same , wondering if fitting new plugs would help Carburetor spitting on startupmake sure you got a solid blue spark? battery may be a touch low. This usually goes away once the engine warms-up. Suddenly, as you are shutting the Briggs and Stratton engine down, it backfires through the carburetor. Like when you overtake someone and then back off the throttle to settle down the speed; the moment I twist to reopen the throttle she Dec 11, 2023 · Continue reading the following article to learn why Briggs and Stratton engine popping noise occurs and how to fix it. it runs and idles very good, however when I accelerate it will spit back through the carburetor. I put it in, hopeful it would start, and as it was cranking over with choke fuel started to spit out of the carb intakes. ) Spitting back usually occurs when opening the throttle. Nov 1, 2024 · Lotsa times, off-idle spitting back thru the air cleaners is a sign of too lean an idle mixture. Engine starts and runs great for a few minutes and then runs "rough" for 15-20 seconds and then runs smooth for another minute or so and then runs rough again. May 24, 2025 · An engine backfiring through the carburetor is a sign of malfunction, often related to the fuel-air mixture, ignition timing, or exhaust system. enough juice to fire and idle . Improper carburetor adjustments or vacuum leaks can cause this condition. The carb is a Walbro WT 194. This guide will help you diagnose and fix common problems. The fuel needs to flow smoothly from the tank, through the lines May 1, 2023 · Hi All- My 70 T100s is spitting back through the carb and consequently stalling. one family owned and stored in a shed since 1969). Jan 21, 2025 · In short, a lawn mower spitting out gas is usually a sign of a fuel-related issue. it runs and idles Spitting (A filthy habit, major league baseball notwithstanding. It was doing this before I changed the carb Sep 29, 2012 · Another cause of carburetor spit back is a plugged muffler. Was Jan 10, 2012 · My Stihl 026 is spitting gas out of the carb. I put the carburetor back on the snowblower, started it and got the same popping and spitting out the carburetor. Aug 21, 2011 · That backfiring through the carb could be an intake valve intermittently sticking. Happens at all speeds BUT the one consistent thing is that it's always at zero to just open partial throttle. I bought it from my friends father-in-law and he owned the truck the last 10 years but rarely drove it. com Community Forums 1981 400- Vanguard 23 HP, 54C deck, 56 blade, 50 snow blower, PF Engineering Pin on Loader. I put it back on the 1947 Fleetmaster (29,000 mi. If the engine is spitting fuel out of the carb, there is a reason that pressure is blowing OUT of the carb. reed valve is in the manifold behind the carb would not have anything to do with your problem. This is caused by the rapid opening and closing of the reed valve. The reed looks OK. When I go to crank it over, (I have the hood, and air filter off mind you) it shoots a well atomized ploom of fuel straight out of the carb Mar 10, 2016 · My friend and I soaked/cleaned and rebuilt my Carder carb. then battery went down some more. When your carburetor starts spitting out gas, it can be a frustrating and potentially dangerous issue. Plus, it ensures a smoother ride. oil. Dec 23, 2002 · Good day, everyone! Question, why would an engine spit back (backfire?) through the carbs when it is first started up and rpms increased? My engine has started doing this recently. After priming the carb. #1 Diagnosing and Fixing a Carburetor Gas Leak If your carburetor has a gas leak, the engine will be starved for gas, and that’s why your ATV will sputter when you turn it on. Needless to say We’ll cover how to diagnose and fix these issues below. If you haven't done it yet, take the mixture screw you mentioned completely out of the carburetor and check the passageway for debris. In order to properly diagnose and troubleshoot the issue, it’s important to understand what causes a carburetor to spit out gas. A new piston and fresh rings will work wonders!!!! Mar 10, 2016 · Carburetor spit back when accelerating #364194 03/10/16 12:56 PM Joined: Dec 2015 Posts: 21tennessee, usa rsh47 OP Grease Monkey OP rsh47 Grease Monkey Joined: Dec 2015 Posts: 21tennessee, usa My friend and I soaked/cleaned and rebuilt my Carder carb. Was given a 028 AV, the thing is very clean, will start, but spits fuel out the carburetor like crazy, won't rev. The first check is to make sure the damper is filled to the correct level with 20 wt. This is because a 2-stroke engine "spits" at the carburetor. 5 riley rma. If your carburetor has a gas leak, it was probably caused by a gasket that became brittle or cracked. Jan 18, 2010 · I took the carburetor apart, cleaned the main jet screw hole with a thin metal wire, sprayed the carburetor, checked the float bowl for gas (empty) and reassembled the carburetor turning the main jet screw out one and a half turns. When it does it shoots fire back through the carb Oct 10, 2019 · Backfiring through the carb (spitting or coughing) usually occurs in the morning when a carb's air/fuel mixture is a bit too lean. rpm at idle. Now I know its not a mini but an engine is an engine and the basics are all the same which is why I posted here. I've seen similar in reed valve saws where something was keeping the reed from sealing good. The few times it has actually cranked gas flows out of the muffler and drowns the spark plugs. Aug 29, 2013 · Re: What is Carb Spitback exactly? Spit back is normal on a 2 stroke. A small amount of fuel is forced back out the carburetor, hitting the choke butterfly valve, running Carburetor spit back when accelerating #364194 03/10/16 11:56 AM Joined: Dec 2015 Posts: 21tennessee, usa rsh47 OP Grease Monkey OP rsh47 Grease Monkey Joined: Dec 2015 Posts: 21tennessee, usa My friend and I soaked/cleaned and rebuilt my Carder carb. it will still not rev up and is spitting gas from the carb. Oct 3, 2015 · Popping/spitting back through the carbs usually means the idle jets and circuit are too lean. Mar 19, 2025 · A Carb Spitting Fuel Into Air Filter can be quite troublesome for owners. Jan 17, 2017 · Hi Guys Some advice please - my MGB 1976 is fitted with a single Weber carburetor - what happens is when I start the car from cold the engine appears to run on two cylinders for a couple of moments then runs normally but spits back through carb and sometimes flames come out O When starting the 3. This is occasionally accompanied by kicker kick back. Does the carb need further adjustment, or is this just a feature of these cheap Chinese carburetors? My engine runs smoothly, revs nicely, and the plug looks to be ideally colored. I have a NEW Amal 626, adjusted for max. After troubleshooting, I noticed May 10, 2017 · Thread Tools Display Modes > > Spiting Back though the carb « Previous Thread | Top | Next Thread » Similar Threads Thread Forum 97 cc popping back through carb Gas Club Car Carb and back fire issue Gas EZGO blowin back from carb Gas Club Car Carb back fire Gas Yamaha Gas blowing back out of carb Gas EZGO Oct 29, 2005 · Outdoor Gasoline and Electric Powered Equipment and Small Engines - Chainsaw carb spitting fuel - I have a Craftsman chainsaw that is spitting excess fuel out the carb while running. When I accelerate I find it spits back though the carburetor. Spray a little carb cleaner into the carb throat with the engine running and see if it picks up some rpms. Nov 30, 2008 · Recently my grizz has been popping/backfiring back through the carb at low rpms. I'd rule out retarded ignition because it's only the rear carburettor. After about 10 minutes I can now disengage the choke and and she goes on her own but idle is still erractic. it runs and idles Apr 28, 2021 · You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum Carburetor spit back when accelerating #364194 03/10/16 11:56 AM Joined: Dec 2015 Posts: 21tennessee, usa rsh47 OP Grease Monkey OP rsh47 Grease Monkey Joined: Dec 2015 Posts: 21tennessee, usa My friend and I soaked/cleaned and rebuilt my Carder carb. Throttle is sluggish. I have topped up the carbs with damper oil (from Moss) and the timing appears correct - but it still does it. May 4, 2013 · Re: Misfiring (spitting gas out carb) Spitting gas out of the carb can mean a lean mixture. I'm thinking that the metering lever may be set too high. 4 MK2 from cold it spits back through the carburettors until it has warmed up. From poor idling to backfiring, we cover it all. Fuel Delivery Problems: The Root of the Issue A lawn mower spitting gas is a telltale sign of a problem with the fuel delivery system. Please help, I can't understand why ? I checked the intake manifold for leaks by spraying WD40 while running and no smoke. The engine was just rebuilt, and the carb was also restored and rebuilt. That's why you have an air box on it with a hose going to the intake manifold. When a chainsaw's carburetor is Carburetor spit back when accelerating #364194 03/10/16 04:56 PM Joined: Dec 2015 Posts: 21tennessee, usa R rsh47 OP Grease Monkey OP rsh47 Grease Monkey R Joined: Dec 2015 Posts: 21tennessee, usa My friend and I soaked/cleaned and rebuilt my Carder carb. Now wha Feb 10, 2023 · If your vehicle’s carburetor is spitting out gas, this could indicate a number of potential problems with the engine. Off idle, lots of power, and smooth. It also does it sometimes when I let off the throttle. it runs and idles Carburetor spit back when accelerating #364194 03/10/16 12:56 PM Joined: Dec 2015 Posts: 21tennessee, usa rsh47 OP Grease Monkey OP rsh47 Grease Monkey Joined: Dec 2015 Posts: 21tennessee, usa My friend and I soaked/cleaned and rebuilt my Carder carb. Apr 29, 2019 · Each idle mixture screw on each carburetor has to be fine tuned individually. The gas will also run out very quickly. Technically, at whatever RPM you experience this, there is a reverse pressure wave inside the intake manifold that is blowing back harder than the engine can suck it in! Apr 23, 2021 · It is an alarming sound and situation. Some will drip much more than others. It’s not stopping fuel that flows into the carburetor right. It is also commonly caused by the accelerator pump inthe carb not squirting enough fuel before the main jets start working. Jun 13, 2018 · Carburator is "spitting" fuel out the back (out the air intake) which kills engine I got a 1972 Honda CB125 about two weeks ago. And if the valve on the tank discharge is a vacuum one, change out that hose. You have been running your lawnmower over your yard. I started noticing a backfiring and stumbling when you accelerate from idle. Jan 25, 2010 · Check your timing and valve adustment. it runs and idles Jan 23, 2024 · Can a malfunctioning carburetor lead to a chain saw blowing fuel back, and if so, how? A carburetor is an essential component in small engines like chainsaws, responsible for mixing air and fuel to create the necessary combustion for the engine to function. When I try to start it, fuel spits up through the carb when the motor tries to hit. the electronic ign does have quite a draw even though it don't show on the ameter. Read also: Why Carb Spitting Fuel Into Air Filter? [Causes + Fixes!] Sep 9, 2019 · As it has just been "rebuilt" and by the sounds of it quite badly, I would suspect the cam being out of time. The most common culprits are a clogged carburetor, a faulty fuel filter, or a problem with the fuel line itself. Expert Harley Davidson CV Carburetor Troubleshooting guide. Jul 25, 2014 · Hi, CV carb has started to spit back. Hello forum members, When I attempt to start I am successful 75% of the time, the rest 25% I get carb spit back, sometimes strong enough to unseat the carb from the cylinder head. 2. Diagnose fuel issues, vacuum leaks, and poor engine response quickly. I pulled the carb/filter cover, ran it again, and get a geyser of fuel spitting up from the carb at WOT. Put your pinky in front of the carb and run the engine. A change in the idle mix adjustment or a different slide cutaway may be needed. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. May 30, 2016 · As I am testing the bike, the idling goes up and down from 1k to, 3 to 4k rpms, there is some back spit /pressure from the carbs and the cylinder that was dead seems to want to come back to life coming in and out. This journey will make you more confident in Nov 23, 2022 · In this article, we will discuss the possible causes of the carb backfire problem and the solutions you can apply to avert a potential disaster. Understanding your carburetor can save you time and money. Backfiring in the carburetor can be an indication of an underlying issue that should be addressed quickly. Am I too advanced on my timing ? I have In this article, we will teach you why it is spitting gas and then how to fix it. it runs and idles Dec 2, 2009 · 09/05/2019 10 min read tech Carburetor Installation and Tuning carburetor tuning and adjustments video Quick Start Tuning Bill Tichenor 12/02/2009 Carburetor spit back when accelerating #364194 03/10/16 12:56 PM Joined: Dec 2015 Posts: 21tennessee, usa rsh47 OP Grease Monkey OP rsh47 Grease Monkey Joined: Dec 2015 Posts: 21tennessee, usa My friend and I soaked/cleaned and rebuilt my Carder carb. It seems to do it worse when its cold. It Sep 12, 2014 · Post ReplyForum -> Not-So-Modern Feb 12, 2025 · If your Harley Davidson CV carburetor is acting up, don’t worry. The exploding mixture then vents through the carburetor. May 18, 2017 · Well after further digging I find there is a check ball that is part of the Spit Back Cup system, and sits in that metal tube to the left of the air cleaner cover stud. Apr 1, 2011 · I have a Briggs model 407577 Type 0292 E1 21HP Intek V Twin engine that is blowing gas out of the carb and flooding the engine. Oct 10, 2015 · Page 1 of 2 - Spitting Back Through The Carb - posted in Problems, Questions and Technical: Morning! Iv got a little problem with my 1. Why is does a motorcycle backfire through the carburetor? A motorcycle backfires through the carburetor because of a poorly timed spark, intake valve closure issues, or hot carbon build up causing premature detonation. Are the carburettors more or less balanced? Does the linkage open both throttles at the same time? Jan 14, 2025 · FAQs Q: Why is my lawn mower spitting out gas? A: There are several reasons why your lawn mower might be spitting out gas, including a clogged air filter, faulty carburetor, low oil levels, faulty spark plug, clogged fuel line, or faulty fuel cap. I believe the issue is with the carb as the trick kit went in and the fire started coming out. it runs and Carburetor spit back when accelerating #364194 03/10/16 11:56 AM Joined: Dec 2015 Posts: 21tennessee, usa rsh47 OP Grease Monkey OP rsh47 Grease Monkey Joined: Dec 2015 Posts: 21tennessee, usa My friend and I soaked/cleaned and rebuilt my Carder carb. Apr 23, 2024 · Your carburetor may be spitting out gas due to a clogged fuel line or a stuck float valve. had this happen on mine. May have blockage in the slide or a jet if . Before yesterday, the car ran great, better than it has ever run before. Backfire, or afterfire, occurs when you shut the engine down at high speed. May 20, 2015 · Briggs Engine 127802-0640-01 95091859 Carb has primer bulb Toro Push Mower Problem-Symptoms: 1. Mar 24, 2010 · Can someone please tell my why my carb is spitting out gas when I try to start it? I thought the carb was flooded, so I took the carb off, dumped out Common reasons include issues with the fuel/air mixture, carburetor, ignition, or fuel pump. Sep 3, 2013 · That can be caused by exhaust valve recession - the head shrouds the last of the exhaust charge and hot gasses go out the intake and bang. While your mower or motorcycle will still run, the engine performance will be poor. Carburetor spit back when accelerating #364194 03/10/16 11:56 AM Joined: Dec 2015 Posts: 21tennessee, usa rsh47 OP Grease Monkey OP rsh47 Grease Monkey Joined: Dec 2015 Posts: 21tennessee, usa My friend and I soaked/cleaned and rebuilt my Carder carb. It doesn't do after I am going faster, only about 10 mph and under. it runs and idles Also to know is, what causes an engine to backfire through the carburetor? Fuel To Air Mixture Is Too Lean Too much air and not enough fuel causes backfires to occur in the intake manifold. It can also mean that you have dirty intake valves that don't seal and on ignition, overpressure forces itself past the intake valve and back out the carb. sorta. vye9 5fah vaxvbm rr vxxe jpy5 kd2dyt 1dott lfm 7wgb
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