Lawn Mower Surging Up And Down Lawn Mower Surging Up And DownExperience: I Own a Lawn Mower Sales and service business (44years). Is your riding lawn mower not working exactly like it should. Aside from a fuel supply blockage, a faulty gas connection, a faulty spark plug, or a dirty or corroded carburetor, there are a few other possible causes of. Hold your finger on the throttle, if it smooths out the governor is set incorrectly. What is the problem with it ???. Thanks again, saved me the time and cost to fix something that wasn't broken. breesmom, I am by no means a regular mechanic on lawnmower engines, but typically the only hose that feeds into the carburetor is the fuel line that attaches to an input port on the side of the carb. What causes an engine to over rev? What causes lawn mower engine to …. Following these steps, you can fix backfires caused by inadequate lawnmower fuel delivery. If the spark plug is loose or damaged, the mower may be difficult to start and may screech before it runs. Now for the troubleshooting steps I have taken. 318 said: Hello fellow 318 owners, I recently rebuilt my Onan P218G and it is my first rebuild as I am 16 (I hope to do many more). What causes a lawn mower to surge up and down? A blocked fuel supply is the most common cause of a lawn mower engine surging. Repair or replace the pump if needed. 4) When under load (mower or snowblower engaged or driving) it runs fine with no choke until it warms up (see #5. The best way to do this is to move the throttle from idle to full open and note the way the governor shaft moves. I bought this Murray mower for a friend who is kind of down on their luck thinking I could put a blade on it and have them a good mower but it's surging really bad. Right from the vent in the fuel cap down to the fuel line into the carb. Jul 23, 2013 / MTD Erratic/loping idle at all speeds. Dilution due to eventual condensation lowers the fuel quality. Sep 22, 2020 / New Carb, New Plugs, New filters, still surging. These are bought by individuals in bulk from factory rejects and resold on amazon. How to remove and clean a Briggs & Stratton riding lawn mow. Replacing or absolute cleaning of the carburetor usually resolves the "not enough fuel" problem. How To Fix Briggs & Stratton Surging Engine. If you have a lawnmower with. Also, go to a Honda mower forum, others may have the same issue. A car uses water in a liquid to cool the engine while a riding lawn mower uses air to cool its small engine. I have a John Deere snowblower and the engine revs up and down (surges). Hook up an alternative fuel tank ( pinch it off your push mower ) to the fuel pump. You were right guessing carb first, however you may not have solved it by buying amazon knockoff parts. So we just got our first Lazer Z mower this past week! Very excited about it! All we know is that it was used on a gold course and has 2550 hours on it, I think it is a 2012, it is a S series with 72" deck. I have been working on an old 1997 Snapper rear engine rider with a Briggs and Stratton 28N707 0173-01 15. Spark plugs are also affordable mower parts that are sold online or in home improvement stores. I find it easier to remove the intake manifold from the engine, and then remove the 7/16" mounting screws that mount the carb to the manifold. Engine oil capacity is dependent on your specific engine model and can be determined by checking the Oil Recommendation FAQ. Carburetor throttle plate position on lawn mowers isn't controlled by the throttle lever. You can tell a lawn mower engine is surging by the repeated increase and decrease of the engine revs or sound. This engine has been well maintained but has had a backfiring problem I since the first year I owned it. Opposed twin surging w/ odd findings. Purchased 2002 (Scotts mower) 150 hours. Change the fuel filter -- which is also a good practice if you have moisture issues. The spark plug sends power to the ignition coil which creates sparks to start combustion in the cylinder. my mower is a 21" self propelled, electric start TB280 ES. To adjust the carburetor, you need to have the engine running. The main jet needs to be cleaned. Not cleaning each part of the lawnmower separately and regularly without removing it may also cause the issue. 1 Problems and Solution to Lawn Mower Surging. Riding Lawn Mower Sputtering and Backfiring: What to Do. Check whether the float moves up and down without sticking, and clean …. You can start at either the carb or the fuel tank and check for obstructions. Kohler Courage SV591 surging and backfiring. But apart from the fuel supply blockage, here are some other probable causes that can contribute to the lawnmower engine surge. Lawnboy Duraforce Surging Fix!. A Honda lawn mower may start and then die when bad fuel clogs the fuel system; a plugged air filter or incorrect choke position restricts airflow; a spark plug or coil is bad, or the mower overheats from an incorrect engine oil level or a plugged mower deck. Jan 2, 2022 / Snowblower surging up and down. Loose bolts mean the carburetor is prone to pulling in too much air through the seams. Once you understand the actual reason, you can skillfully fix it by following the below-mentioned solutions. - Briggs and Stratton 675 Series Repair. replaced magnetos and gaped to spec. Why Bad Boy Lawn Mowers are the Best Choice for Your Yard. When it does this, I can see the arm that the idle screw is attached to moving back and forth. just a quick overview of how to take a basic briggs mower apart and the common causes of a surging mower. This means there is more air in the gas mix, and it results in incomplete combustion. Why Does Your Lawn Mower Engine Speed Up and Slow Down?. I purchased a Super Recycler Model 21387 (190cc engine) about 3 weeks ago. Briggs & Stratton 190cc Model 120000 Quantum 675 Series Lawn Mower Engine. Replaced fuel filter and all fuel line from tank to carb. Air (vacuum) leaks, such as intake gaskets or throttle shaft seals. Engine on riding lawn mower surging. Jul 4, 2013 / john deere x540 engine surging and will not idle. The common reasons are: Jammed Air Filter; Greasy …. I bent the little tab that the big end of the needle sets on. Several local governments are pushing a transition to electric tools, in pursuit of cleaner air and quieter neighborhoods. If you suspect that the gas has been contaminated, drain it all and put in fresh fuel. Lawn Mower That Revs Up and Down">How To Troubleshoot a Lawn Mower That Revs Up and Down. It is caused by a lack of fuel and in some more rare cases, too much fuel. surging on a governed engine is always due to an fuel;air ratio that is too low. 17 HP Kawasaki Engine Surging?. Using Bad Gas Does gas go bad and cause problems? Yes, it does, and yes, it will. 9% sure it will fire up, and then dies in a couple seconds, you have a fuel …. A brand new carb from the Honda dealer was less than $16 and it solved the problems. Kubota mowers are a great choice for anyone looking to make sure their lawn is in top shape for the season. One of these screws adjusts the mixture of the gas/oil/fuel mixture, and the other screw controls the speed of the idle. There are passages and nozzles (called jets) that route the fuel through the carburetor. If your lawnmower starts up but then dies in the middle of mowing your lawn, you could have a bad spark plug. I have never had any trouble with it in all that time. I have a 2006 X540 with the Kawasaki FD731V (liquid cooled, not fuel injected). My 1989 John Deere 318 runs great, but it stalls after mowing for about a 1/2 hour and won’t restart until it cools off. They have established themselves as one of the top brands when it comes to manufacturing high-quality mowers. May 17, 2023 / Engine Surging/Governor Search. The details on the mower and engine are as follows: Tractor model #: 13A2771G790 (March 2006 mfg date) Engine model #: OV490EA (Tecumseh) -- It's an 18 hp engine. A change in running indicates that a leak exists. When there is mud, grass or other buildup coating the blades, they slow down and the motor works harder to turn them. 999999% of everything is at least of merchantable quality and not defective parts sold using the description as OEM (omitting …. Trimmer: Engine Rpm's Surge Up And Down. Remove the cap and check the gas tank for evidence of water (if you see the liquid separating or looking like two different colors). Precisely, you need to check the governor and carburetor of your lawnmower if its RPM surges up and down. A new issue has developed that I was hoping the get some input on. Get the filter from the housing, and set it aside. Honda mower was broken and not running right. Before, my mower would surge with the blades engaged and also without the blades engaged. It has about 50 hours of residential use. 360lawncare Discussion starter · Mar 13, 2014. Again, like you said, I remove the wires to the spark plugs in each side and restart the mower. Sep 10, 2021 / Briggs Twin II Surging, barely runs at idle. I recently replaced the head gasket due to oil in the fuel pump-the gasket had clearly failed. Joined Apr 26, 2012 Threads 28. Working on the fuel and air supply end of things, if your lawn mower only runs with the choke on, there is probably a fuel delivery or carburetor problem. Anyone having issues? Honda HRX217HZA. Aug 2, 2018 / Poulan Pro Riding Mower Over Revving. Have 2-cycle and 4-cycle certification. Apr 30, 2017 / Brand new Briggs 24HP Intek engine surges / lopes without PTO engaged. Last week I got about 1/2 way through mowing and all of a sudden my John Deere 717A engine started surging, rev up then down. I noticed that the bottom spring that controls the governor had been stretched allowing the engine to surge. If the blockage is cleared, the engine may suddenly begin to accelerate. A clogged fuel filter can also cause a mower engine to die. When I start my lawn mower it will quickly die within 1 second now as long as it stays flat on the ground. I assume when you start the mower it instantly revs up to maximum throttle and stays there until shut down. After completing the cylinder head install I was able to get the mower up and running. Lawn mower surge refers to the irregular or fluctuating engine speed that occurs during operation. When warm, fires up with barely a touch of the key. If I manually hold the carb closed against it's idle stop, it actually cuts out. Full tank of gas, starts right up and mowes perfectly. Jul 9, 2019 / Husqvarna Z246 Throttle/Governor problems. For all down draft Briggs and Stratton Flo-Jet carburetors (7, 8, 10, 11 HP Horizontal), remove the bowl nut (has adjusting needle in it) and blow compressed air up the nozzle. I show how to fix your mower for fr. Over reving is only because the governor is not working , their is an air leak or the cam is excessivly worn. We incorporated the details on how to stop the 17 HP Kawasaki engine surging. The engines on snow throwers are set to run with a slightly rich fuel mixture. The major lawn mower valve adjustment symptoms can include: Hard to pull the starter cord. Sometimes dies if the throttle is at it's lowest, but will continue to run any other situation. The details of the engine are as follows. Check sealing of welch plugs, caps, plugs and gaskets. Tecumseh engines are built for use in lawnmowers and snow blowers. That’s how easy it is; now your generator is protected from gumming and plastic and rubber degradation. Kohler, Kawasaki, Toro, Honda and many more. Residential zero turn mowers are the perfect choice for homeowners who want a fast, efficient, and easy way to get their lawns looking great. Briggs and Stratton, Lawn Mower Engine Surges. I let it sit in there overnight and put it. Take your time and determine what causes the lawn mower to rev up and down. I have caberator problems also. Engine surges after warming up, Troy bilt model tb 210. Next time went to start and got it running engine surged at all speeds---- checked all lines to carb, replaced fuel pump and filter checked plug and used a new plug to test. Mowers that start and die are often suffering from unstabilized fuel that has broken down. This HIDDEN Jet is the Cause of Your Engine Hunting or Surging Lawn. Toro won’t drive straight or steer correctly. Jun 12, 2016 / Lazer Z surging engine problem. I have a one year old Husqvarna 24 hp with a Kohler V twing SV725 engine. The mower will start normally, but then used to just completely cut out and …. I believe this could be your issue if. it is what slows the engine down, and pushes against the. The engine continually throttles up and down and I haven't been able to find the problem, I checked all the fuel lines, replaced the car … read more. Could I have hit something and possibly the kotter key is off making spark/timing off? I have replaced spark plug and fuel filter. I am no pro, this is just me trying to DIY and save a few b. surge under load or throttle. If you are unaware of the correct way to tip over. Make sure your fuel filter is made for a tractor with a fuel pump. Surging is the idling up and down in rpm. Actually after reading for about an hour here - I repaired it today and it runs as good if not better than ever. The engine has began surging lately and will not keep running at lower engine speeds. A riding mower engine may surge due to a variety of mechanical or environmental issues. This is where the spark plug steps in. The sound resembles repeatedly throttling up and powering down the mower. 49E877-0005 With a compression ratio of around 8. If I hold choke closed some, it will flatten out. bertsmobile1 said: We have all seen it before and the usual cause ( about 90%) is a blocked carburettor. Maintain Your Lawn Mower With a Gas Additive. Bad fuel or fuel with too high of an alcohol content can also require excessive choke use. You may need to change your oil viscosity to 20W-50 when operating in higher ambient temperatures. Disconnect the fuel line with a pair of pliers, blast some compressed air through it to clear it, then reinstall it. Unscrew the four 1/4-inch bolts holding the case on top of the Toro mower. One common consumer complaint with Lawn Boy mowers is that the mower refuses to start. This will specifically focus on that area and similarly make sure it’s clear. It has an electrode that passes through a ceramic insulator. Check out My Amazon Auto Accessories Store! Lets make that Weekend job less Painful! htt. A sporadic blockage can cause an engine to slow down, especially if the air it needs isn’t getting to it. If it doesn’t work, you spent 7 bucks, but if it does work then you saved yourself a whole lot of time and effort. Take a look at your spark plug and see if it burns the fuel okay. Hey, so I am stumped on what this issue is. At first I thought it was out of fuel. SOLUTION: Siphoned out all gas, Cleaned spark plug with 70% isopropyl alcohol, put Sea Foam in fresh gas. If the engine still surges while there's a load on it (or it dies. With several types of lawn mowers available in the market today, you need to figure out the best one for you. The carburetor is near the air cleaner assembly and the two idle adjustment screws are on the top and side of the carburetor. (more on this below) The diagnosis and fix are covered here in this post, but if you need video help, check out the Mower blowing. Why is my lawn mower not running smoothly? A dirty air filter is one of the most common causes of a poorly running lawn mower, since it starves the engine of the oxygen needed for combustion. Clogged jets can’t provide the right mix of air and fuel to the engine. Lawn Mower Engine Surges up and Down. I have a JD D110 and the motor surges up and down through all throttle positions. A buying guide for lawn mowers, snow blowers, chain saws, and more, complete with product reviews and a online forum community of enthusiasts ready to answer your buying or maintenance questions. Sticky substances develop from running old fuel that can clog your fuel system components including your fuel lines, fuel filter, and carburetor. However, if there are any leaks, the engine can draw in outside air that hasn’t had fuel added to it, leaning out the mixture. Rich as all get out with fuel line open. 1) replace the fuel solenoid on the carb with a short bolt, thus taking the solenoid & solenoid wiring out of the question. And if the air filter of a lawn mower is dirty or clogged, it will not allow the airflow into the engine properly. I removed the carb, cleaned it and sprayed cleaner through all the ports, …. next is air leak between carb & engine. After spraying the dirty spark plug with brake cleaner, you can let it soak for about 10 minutes. Kubota mowers are among the best on the market, offering a variety of features and benefits that make them an ideal choice for any lawn care enthusiast. May 8, 2012 / Mower keeps surging #1 Hey guys, Lawn Addict. Remove the spark plug very carefully. How to Choose a Riding Mower. Add fuel stabilizer to the fuel tank (producers advocated blend ratio) and pinnacle with a full gasoline tank. So either the carb main jet is blocked or dirty, float level is too low, fuel lines restricted, gas tank not venting or an air leak between the carb and the mower or blocked bowl vent. Check the spark plug to see if the wire is connected to it firmly and not wobbling about. There is one main reason all this surging is going on. I have a D105 JD riding lawnmower that has 38 hrs stop it after cutting yard a that time running grate. Follow the safety guidelines provided in your. Move the throttle to the “Slow” position. Once your cylinder fills up, restarting the mower causes the oil to burn, making your mower a chimney. bertsmobile1 said: Mowers have not been idled down before shut off for decades it actually increases the heat in the engine. If your mower is subject to regular use, dust or other particles may tend to enter the engine and block the fuel supply. Small Engine Troubleshooting: Why Does My Engine Surge Up and Down. The mower may not die completely as this happens, but it may surge the entire …. By watching this video, you will see the fix to my surging motor. Over 30 years experience repairing lawn and garden equipment. 5 hp IC Briggs engine on my o-turn mower. If there is no clear fuel filter in the line install one to watch to see if fuel is flowing at the same rate, hot or cold. From what i've read that engine is a …. New Honda HRX217 Surging, Hunting, Oscillating Idle Problem. The noodle gasket and a welch plug. To help you find the best lawn mo. May 28, 2018 / Honda mower revs up and down. Drain a little engine oil until it is at the manufacturer’s recommended oil level. Is the small engine in your power equipment surging up and down? This can be a serious issue that will decrease your machine's performance! 😲Don't worry tho. Other common causes of a surging Honda include a bad spark plug, bad gas, moisture in the gas bowl, and. The fuel sitting in the mower’s carburetor can block the main engine jet, causing a surge in lawnmower blade rpm. Easy Honda HRX Lawn Mower Surging Fix. It’s old but it is in fantastic shape. Someone on a forum suggested the valves may be causing my surging. One of the most important parts of lawn mower maintenance is ensuring that you use the right kind of oil. Spray or pour penetrating oil into the funnel. So, if your Mountfield mower won’t start, make sure you have plenty of fresh fuel, no engine filters are blocked and that your spark plug is clean and secure. 3) check that the fuel solenoid is working. My Timemaster started to develop an engine surge when idling. Mower surges when going slightly down hill. Backfiring can do a lot of damage to the lawn mower and. Start the riding mower engine and allow the engine to warm up for five minutes. This may be enough to fix the issue. Jan 28, 2021 / Can't stop B&S engine surging. A hurricane's storm surge has the potential to catch people off guard. If you’re in the market for a new lawn mower, you may find yourself searching for “Toro lawn mower dealers near me. Dull, Bent or Loose Mower Blade: Sharpen or replace. It's always start at the first pull but engine is really unstable surging up and down until I stabilize the governor with my finger. I cut half my lawn yesterday and got rained out, today the engine will not run properly. Because the issue started while mowing, it is not likely an issue that can be …. Running rich is when your engine is receiving a higher concentration of fuel-to-air mixture than required. HOW TO FIX A SURGING RIDING MOWER Briggs and Stratton Double. Why Does My Lawn Mower Surge? (Issues, Problems & Factors). When your lawnmower revs up and down, the governor gives its best effort to ensure a sustained speed but fails to do it. Make sure to remove all the dirt, such as fuel residue, oil, and dirt. I have a Dixie Chopper Magnum 2250 with a Kawasaki Fs651v engine. generally a dirty carburetor and a lean condition will cause the surge. Common Causes of a Surging Engine (A Closer Look) Now it’s time to take a closer look at the common causes of why your lawn mower is surging. It runs great but when I engage the blades the engine surges/pulses up and down but does not change RPM. One of the most common causes is an air leak in the intake or exhaust system of the engine. Here are a few reasons that might cause lawn mower surging. Figuring out why your mower is surging can be overwhelming, …. One of the most common causes is an air leak in the intake or exhaust system of …. Locate the linkage spring between the throttle and the governor arm. Hello, I have a 2016 Toro SS5000 that started acting up today. I cleaned fuel cap & carb and that did not help. Check the fuel lines attaching the gas tank and carb. Jump to As stocks continue to gain, a pickup in trading of consumer discretionary is also. I have put a new fuel filter, plugs, and air filter on it. No throttle control on this model. At idle the engine slows down and picks up (surges). Surging can occur when the engine is under load or when at idle; since yours is surging at idle, we can be pretty sure the idle jet is likely partially blocked. Mower surging/sputtering? : r/lawnmowers. Troubleshooting Lawn Mower Surging And Quitting: Common. Clogged fuel jets inside the carburetor commonly cause the lawn mower engine to surge. Tightened and un-tightened the springs. 4 hours ago · If your lawn mower starts surging, you're essentially dealing with a lack of fuel making its way to the engine, and a bad carburetor is one common cause. I have had it for 15 or 16 years. What Causes A Lawn Mower Engine To Surge?. A half-empty gas tank is not a problem and should not cause the lawnmower engine to surge. Rickh606 said: It was surging before I did this work. Starts quickly, then runs for 15 - 30 seconds and dies. It does have pilot jet or something with a plastic cover. When the filter is so plugged the engine is unable to draw air through the air. The condensation on a hot summer day can also choke the engine and makes your lawn mower surge up and down. The motor was surging or revving up and down and would not idle. I have a craftsman LT1000 riding mower with a 19. Reinsert the spark plug wire (or reinstall your air filter). This one has a metal emulsion tube and also a metal seat, kind of like the ones on a plastic lawn boy carb. How to Troubleshoot Surging Lawn Mower Engines. Surging on a governed engine is always caused by insufficient fuel to maintain a high speed. The motor is a 19hp Kawasaki FH601V It idles fantastic, and starts like a dream, but at full throttle and especially under load it lopes and seems to. Set the brake on the lawn mower. What causes a lawn mower engine to rev up and down? A lawnmower that hunts and surges may be experiencing something as simple as an airflow issue. It does not do this when the blades are engaged. Test it to see if it is now working correctly. Honda Harmony constantly surges while running. cleaner around mating surfaces when running and see if it smooths out also spray around throttle shaft. With so many retailers and online marketplaces available, it can be overwhelming to know where to st. This can be due to running old fuel through your mower. Top Up the Fuel Level on Your Generator. tractortinker Discussion starter · Apr 28, 2016. What causes a lawn mower to rev up and down? A lawnmower that hunts and surges may be experiencing something as simple as an airflow issue. When a lawn mower surges, it sounds as if the engine reaches full speed, only to decelerate quickly. PR600Y22SHP PR65N22SHB PR65Y21CB PR65Y21MA. The lawnmower may rev up and down if the spark plug is damaged or having an unbalanced adjustment. If I dribble some gas into the carb while it's running or I get the choke set just right, I can get it to run smoothly. Hello everyone, I am currently working on a friend's riding mower with a 22HP 724CC Briggs Intek V Twin motor and it suddenly started surging. Make sure the throttle moves from idle to full open freely after making the adjustment. Manager/Tech/Kohler Exper 42 satisfied customers. I put together this guide to help you. Why Bad Boy Mowers are a Game Changer in the Lawn Care Industry. Lawn mower idles up and down? Briggs and Stratton surging Fix">Lawn mower idles up and down? Briggs and Stratton surging Fix. A lawnmower engine surging up and down is typically caused by one of the following: – Dirty air filters blocking proper airflow to the carburetor. Muffler construction can induce backfire. For more specifics, follow this troubleshooting guide. In some cases, it may only happen under certain conditions, for example, only after the mower gets hot or only when the fuel level gets …. So, what happens? The heat stays in the engine, causing overheating, mower gets under load and ends up bogging down. The lawnmower can backfire in both ways. Why Does Your Generator Rev Up and Down? 11 Fixes. To prevent backfires when turning off your Honda lawn mower, reduce the mowing speed gradually, and allow the motor to idle for roughly 20 seconds before …. Briggs And Stratton Carburetor Troubleshooting Guide. Briggs and Stratton Surging With new Carburetor. So I attached both wires back up and started the engine. Joined Jun 4, 2011 Threads 36 Messages 1,377. If your lawn mower starts surging, you're essentially dealing with a lack of fuel making its way to the engine, and a bad carburetor is one common cause. That time it wasn't out of fuel. Briggs and Stratton dies when hot. It was surging and needed to be run nearly with the choke on by the end of last summer. cycle lawnmower surges while running. If it doesn't work, you spent 7 bucks, but if. Run the engine for two minutes to flow into the sparkling fuel. I’ll explain more about the loss of power and. That is because if your air filter is clogged up, it means there is more gas in the carburetor than normal. Surging is usually due to a dirty fuel filter. brian41582 Discussion starter · May 25, 2012. It surges at all speeds and the blade engagement does not seem to matter either and it sounds like it might settle down every once and a while, for about 10 seconds and then it starts the surging again. Valves adjusted fine, and basically runs as it did before. Do you ever wonder why your lawn mower engine revs up and down? The annoying sound that also affects the power your lawn mower puts out is caused by a fuel delivery or vacuum leak issue. If choked slightly it smoothes out. When it's cold and the autochoke is closed, it runs fine. 0HP Briggs & Stratton engine (12V802-1776-B1). Here are 10 reasons and fixes to help prevent lack of fuel to a 2-stroke engine. Thanks for tuning back into Chickanic! If you found this video helpful, please LIKE, SUBSCRIBE and COMMENT!!If you would like to support my channel, find my. Lawn Mower Engine Idle Surges or Stalls. The most likely problems are contaminated gasoline, a clogged gas cap vent, a dirty air filter or carburetor, or a damaged air intake gasket. I have a Lawnboy mower purchased in 1987. The spark plug works with the ignition coil to create a timed spark in the cylinder, causing combustion. Contaminated or bad fuel presents the main cause of surging on any engine. At first it would do it on occasion when hot, but it would clear up with the blades engaged under load. Mar 18, 2018 / Kohler engine surging, seems to be governor #3. This is one of the most startling issues to encounter – most people assume that the engine is about to die or blow up. This is to prevent the engine from bogging or stalling when the snow thrower suddenly experiences a heavy load of snow. Engine starves for fuel at high speed (leans out) Check inlet needle and seat for condition and proper installation. i would put my paycheck it is in the carb. A few months ago someone broke into my garden shed and drained the fuel from all my mowers, gas-powered equipment, and my cans. May 10, 2020 / Mower runs fine for an hour then sputters and dies. As long as you can figure out what is causing the loss of power, you should easily be able to address it. When there is a fuel supply problem, the engine does not receive enough fuel, resulting in a surge. Surges at all throttle positions. Your surging problem is the idle circuit in the carb is blocked. Solved! My Lawn Mower Won’t Stay Running. Air filter, spark plug and fuel filter changed in September 2018. Oct 2, 2020 / Toro engine surging. The wrong oil can cause damage to your engin. I have a 2020 Tiger Cat 2 with a Kawasaki FT730v EFI engine. After removing the carb and pulling out the float and needle valve and using and air hose to blow it out, I put it back together and it did the same thing. Kubota Mowers: The Best Lawn Care Choice. Most of the time, power surges and loss of power are caused by the flow of fuel being constricted by an issue in your mower, however, there are other common causes such as vacuum leaks, dirty carburettor gaskets, the unbalanced air-fuel ratio from a clogged filter and more. Surging is always caused by a lean condition as evidenced by applying choke (enriching the fuel/air mix). Then, reinstall the outer housing. Jun 8, 2020 / Kawasaki FH601V surging / loping at high rpm. Engage the PTO, everything runs like a dream. Lawnmower engine surging, with a brand new carburetor. May 19, 2014 / Lawnmower engine surging then dying. you can disconnect it and maybe run a throttle controll from a local hardware store.