Kawasaki engine surges at full throttle - It has: -Fresh oil (5w 30) -Fresh gas treated with stabiliser. Runs smooth at idle and at midrange but backfires (afterfires) and surges at full throttle. I tried adjusting the high speed jet screw and that somewhat helped but it still backfires every once in awhile and stills seems to surge (more like the speed oscillates a little).

 
I have a Ferris IS 2000Z 52" with Kawasaki FH721V 25 HP engine, purchased from my dealership about one year ago as a demo unit with full warranty. ... I can get maybe 5 minutes of smooth running, then the engine starts to bog and surge. I stop the blades and lower rpms, and then it will stall completely, requiring choking to restart, even .... Tammy watts obituary

These are arguably the main culprits behind lawn mower engine surges. We incorporated the details on how to stop the 17 HP Kawasaki engine surging. 1. Minimal Fuel System Response. Contaminated or bad fuel presents the main cause of surging on any engine. Dilution due to eventual condensation lowers the fuel quality.Your riding mower engine is designed to be run at full throttle, so running it at less than that can create undue stress on the engine and parts. This includes, but is not limited to: Poor battery recharge rate and shortened battery life – The faster an engine runs, the faster it recharges the battery that is drained severely on ignition ...Engine surge is a common issue that occurs in internal combustion engines, where there is an unexpected increase in engine speed or power output. It is characterized by a sudden and temporary surge in RPM (revolutions per minute), which can be felt as a sudden jolt or acceleration. Engine surge can be caused by various factors, such as a malfunctioning fuel system, ignition system, or throttle ... Once stalled, the governor will close the throttle. At this point the carburetor’s idle circuit will begin to supply fuel and the engine will fire once again and the throttle will return to full. This cycle repeats over and over, causing the engine to die and surge. Fixing a surging engine is usually a matter of cleaning the carburetor. Ariens snowblower surges at full throttle. I have an Ariens 524 snoblower with a Tecumseh 5hp motor. When I got the snowblower it wouldn't run without the choke on. I cleaned the carb and it will now start and idle fine. The issue is the engine surges at full throttle. The carb does not have an adjustable jet screw.Faulty Impeller. Bad Spark Plugs. Malfunctioning Fuel Pump. 1. Tangled Propeller. If your outboard motor will not throttle up, the issue may be as simple as a tangle. Debris such as fishing line, excessive seaweed, beer can rings, or nearly any other material can wrap around the propeller and its spindle.Apr 9, 2022 · This is a late 90's model Scott's lawn tractor with a Kohler engine. After sitting a few years, it would start and run, but needed a little TLC to resolve th... Tecumseh Engines: With the engine stopped, loosen the screw holding the governor clamp on the governor lever. Rotate the clamp in a direction that will force the throttle shaft open and allow the governor follower arm to rest on the governor spool. Push the governor lever connected to the throttle to the wide open throttle position.4. Apr 30, 2018 / Kohler 7000 Started Surging Suggestions Needed Please. #1. Hi Follks, I am not the best at fixing small engines so I am trying to learn. I have a Troy-Bilt Zero turn with a Kohler 7000 Engine and Walbro Carb. The engine started to sputter and die when I ran it for 5 min. The first thing I tried is pulling off the carburetor ...64. Messages. 24,705. Jul 7, 2021 / Briggs intek backfires at full throttle and surge at low. #6. The backfiring is unburned fuel igniting in the muffler. Remove the blower housing and remove the kill wires form the coils. Problem goes away = failed diodes. If the problem stays then swap the coils left right.66. Feb 18, 2019 / 6.5 Intek engine surging. #3. First, drain the old gas out of the tank. Old gas destroys those carburetors. Running the engine for a couple minutes occasionally would keep the gum from building up. Add fresh gas and add some Seafoam to the tank. Then let the engine run it through.The problem is the carb. is running a little lean and doing the above task should smooth it back out. 1 bad spark plug could cause this too. I've seen 1 plug do it on briggs a few times before, otherwise yes, RPM hunting is normally a lean fuel mix, pull the choke on a little and see if it smooths out, if it does, check your fuel filter first ...758. if fuel was left standing in carb over winter, evaporated fuel may have jelled up @ carb bottom and - after running - some of that jell has clogged the idle jet passages ? Might try a good dose of Seafoam treatment in the fuel tank and see if carb will clean up. Also, remove engine shroud to make sure no mice nests blocking cooling system ...2 posts · Joined 2017. #1 · Nov 12, 2017. I recently purchased a used 2009 4010. It was idling too low and cutting off when I bought it. Carried it to a dealer and they adjusted Throttle position sensors. After got back home and rode about 30 minutes, it started idling too high to change gears. Every now and then, it idles correctly.The motor surges when at idle, revs up, revs down, up, down. Sometimes dies if the throttle is at it's lowest, but will continue to run any other situation. Engage the PTO, everything runs like a dream. Took it to the shop, they changed out the coils ($200), about a week later, same thing. Took it back, they ran it through test after test and ... Inspect the vent on your gas tank’s cap and clean it if it’s dirty. Drain the gas tank, clean the gas bowl, and add a fresh batch of fuel. Or you can inject fuel cleaner to clean the fuel line. After changing the fuel or injecting fuel cleaner run the lawn mower as usual. Caution: Make sure the fuel is below the maximum gauge level. 2 posts · Joined 2023. #1 · Jan 14, 2023. 40hrs - 2017 Kawasaki Ultra LX 1500 non supercharged. Engine runs fine at light throttles and full throttle. At a certain part throttle range, it has instant power loss then back again, which can be several times a second until I gas on or reduce throttle. At times, more so after the first occurrence ...Answered in 4 minutes by: Technician: Ranwell1. As engines sit or get older, fuel that is left in the carburetor can turn to gum and varnish and cause this and other problems. Also, any gasoline that was left in a gas can for a period of more than 30 days must be discarded because it also has begun to turn to varnish.Hello All, I've got a Kohler 26hp, 747cc, 7000 series, KT745, V-twin on a Husqvarna zero-turn. It has a manual choke (cable type). It has slowly started running rough. At all throttle speeds and when warmed up, the engine rpms surge up and down, and at full throttle it pops through the muffler...6. Last effort before taking it to the dealer: Removed throttle body (PITA), throttle body appeared brand-new inside maybe due to the throttle body cleaning step in #5 above. What I did different was open the electronic servo controlled throttle blade using my finger: full open and full close back and forth - sprayed shaft bearing area with WD40.Kawasaki 17 horse engine, with 340 hours. Is just... Menu. Forums. Today's Posts New posts Search Members Current visitors New ... have a friend's JD x300 (maybe 3-4 years old??) that surges on all speeds. Kawasaki 17 horse engine, with 340 hours. ... It is worst at idle, but is somewhat present at full throttle. It usually gets better as it ...This is one of the causes of engine stalling since the amount of fuel getting to the engine is only sufficient to run the engine on idle but cannot sustain a full throttle. Solution: Inspect the fuel filter for any obstruction. First, remove the filter and blow through it. In case of any blockage, you can clean out the filter or replace it with ...Re: motor bogs down at full throttle I have a 1984 Yamaha 50hp, 3 cyl, oil injected, outboard motor, low hours, and is in fairly new condition. At full throttle, it bogs down. I've changed the gas lines, tank, and fittings. The water pump works fine and the water is luke warm. The repair manual doesn't help either.This Kawasaki 9HP motor on this John De... If you have the time, I'll show the complete carburetor cleaning process I used to solve this surging engine problem.Clogged Fuel Lines. Clogged fuel lines are usually caused by debris, such as grass clippings working their way through the gas tank into the fuel line or from fuel gum caused by bad gas. Either way, the flow of fuel to the carburetor is restricted and causes your lawn mower engine to surge. So, the best approach is to clean out the clogged fuel ...Issue: FR691V V twin motor starts up fine. When it starts, it begins to surge. RPM goes up and down. Governor rotates up and down. This surging happened no matter if at idle or …The engine seems to have full power at full throttle when mowing and seems smooth. Even at idle now, the engine rpm's seem to be smooth and steady but there's that popping sound. One other thing.. Before rebuilding the carb, starting the engine when it was warm was a simple 1/2 second turn of the key..The engine sounds and feels bogged down and surges. When I get to the top of the hill I let off the accelerator and I feel like the the tranny reset to normal operation. I park it. The muffler is real hot. Oil is good, water is good. I let it sit for 30 minutes... only the check engine light is on now.168 posts · Joined 2013. #11 · Apr 22, 2017. Generally there is an adjustment screw somewhere on the carb to increase or decrease the idle. Make small adjustments to see if the rough idle improves. If so, you will probably want to get a cheap tach to verify you are within a safe range.A dirty air filter is one of the most common causes behind a leaf blower that is bogging down: the air is enough for the engine to idle, but as soon as you switch to full-throttle, the machine will stall. All we need to do is replace the air filter. To do this, start by opening the air filter cover. Once it is visible, you can have a look at it ...Every thing I ever had that was surging was repaired by carb cleaning/adjustment. Generally if it surges at high throttle it wont idle. Get it to idle good at lowest throttle first and you are well on your way. Then adjust the high speed jet at wide open throttle. Careful not to over rev. Don.Feb 18, 2018 / 22hp V-twin STILL surging. Help! #2. that type of surge is normally associated with the idle circuit in the carb. Even though the engine runs at full throttle, you are still running on the idle circuit unless the engine is under load. those passages are normally in the area at or in front of the throttle butterfly if you are ...HELP PLEASE kfx700 cutting out at full throttle only! Took it out for 4 days over new years week/weekend and tried a ton of things. Not the fuel filter, not a pressure issue on the fuel tank, moved/checked about every electrical connector i could see on the quad, still no luck.Mar 7, 2015 · It has the kawasaki fs600v 18.5 hp motor on it. Currently it runs fine at high rpm but if I lower the throttle at all it begins to surge up and down. I have already cleaned the gas tank, replaced the fuel filter, cleaned the fuel lines, cleaned and soaked the carb in chemical cleaner, cleaned the jets, changed the spark plugs, replaced the air ... when you have the air cleaner cover off and twist the throttle, you should see a gush of fuel from the little brass stud on the bottom of the tube. No gush = accelerator diaphragm gone or hole in bottom of float bowl blocked. That hole is so small it helps to have x ray vision to find it. Pull the plugs and check.#1 · Jul 14, 2013. I have an LX277, air cooled, Kawasaki FH500V, 494cc, 17HP VTwin OHV. This mower runs a half throttle, but surges when trying to run full throttle. I've …185 posts · Joined 2001. #1 · Jul 5, 2001. i have a hustler z and love it so far! one problem i have is the kawasaki 23hp engine started surging at about 40 hours. The local dealer cleaned and eventually replaced the carb. problem was fixed, or so I thought. Now I have to engauge blades at full throttle or the engine will die.Take a small pair of vice grips and clamp down and turn the studs but just loosen them. Don't try to back them out completely with the vice grips. Snug but don't tighten the two bolts back on the carburetor. Then put the nuts on one stud and tighten the two nuts together.I have a 1 year old Cub Cadet 2x24 I bought used after only 1 season of use. I drained the old fuel and filled it with high octane, ethanol free fuel. When I ran it, it would surge/hunt with the choke off. I took off the carb, sprayed with Gumout, took off the jet and sprayed it with Gumout, took a small wire and cleaned out the jet and all the ...Trimmer was working great, but then started to bogged at full throttle. I went through the possibilities and it turn out to be the fuel filter. Trimmer was working great, but then started to ...GX345 Surging Engine Problems. I have a JD 2005 GX345 garden tractor with a 20hp liquid cooled Kawasaki engine. I am having trouble with the engine surging after it warms up very badly. I have done the following things to rectify the problem with no success. Couple of hints: When I run the PTO (blades) it runs like a top.C. Starting the Engine 1. Position the application throttle control to mid/full throttle. 2. Place the choke control into the on position. 3. Turn the key switch or push the start button. Release as soon as the engine starts. 4. Push the choke control inward. If the engine hesitates, pull the choke control out until theOn the dyno, they noticed a surge at 10% and 20 % throttle regardless of what gear the bike was in. Things that were checked: ECU - they swapped out my ECU with another stock 09 ZX6R ECU, no change same surge indications. PCV - Checked all Power Commander connections to the lower injectors, and the upper injectors going to the quick-shift ...Once stalled, the governor will close the throttle. At this point the carburetor’s idle circuit will begin to supply fuel and the engine will fire once again and the throttle will return to full. This cycle repeats over and over, causing the engine to die and surge. Fixing a surging engine is usually a matter of cleaning the carburetor.The job of replacing is simple and will solve the surge. The process is as follows: Remove the spark plug wire – prevents the mower from starting. Remove – Remove and clean the air filter and filter housing – Clean it using soapy water, and when dry, smear some engine oil over the surface of the foam.Engine surges. If you close the choke 90% it smooths out and keeps running. You can see the throttle close down to an idle, then governor opens the throttle back up to keep it from dieing.Common Kawasaki FR600V Problems. 1. Starting Problem. One common Kawasaki FR600V problem is the engine not starting. This can be caused by anything from a dirty air filter to a faulty fuel pump. Kawasaki FR600V owners should always check the air filter first when troubleshooting this problem. Another Kawasaki FR600V problem is the engine stalling.This is one of the causes of engine stalling since the amount of fuel getting to the engine is only sufficient to run the engine on idle but cannot sustain a full throttle. Solution: Inspect the fuel filter for any obstruction. First, remove the filter and blow through it. In case of any blockage, you can clean out the filter or replace it with ...4-Stroke Air-Cooled V-Twin Gasoline Engine Service Manual. FR651V, FR691V, FR730V FS651V, FS691V, FS730V FX651V, FX691V, FX730V. 4-Stroke Air-Cooled V-Twin Gasoline Engine. Service Manual. For Kawasaki Discount Parts Call 606-678-9623 or 606-561-4983. www.mymowerparts.com.13685 posts · Joined 2005. #4 · Mar 30, 2005. Sound like a vacuum leak! This would cause surging I don't know this engine but check to see if the carb has come loose from the intake manifold or if it has a vacuum line check to see if it has came off or rotted. A EZ test is to use starter fluid and spray it between the intake manifold and the ...Before making any carb adjustments you need to let the enigine run for about 10 minutes, at idle set the adjustment low and right as the engine wants to die due to low rpm's, start increasing it till it's smooth. That should have you right around 1200-1300 rpm's. Recheck the oil level. Keep it below the max line.2 posts · Joined 2017. #1 · Nov 12, 2017. I recently purchased a used 2009 4010. It was idling too low and cutting off when I bought it. Carried it to a dealer and they adjusted Throttle position sensors. After got back home and rode about 30 minutes, it started idling too high to change gears. Every now and then, it idles correctly.This problem almost always stems from the fuel delivery system (fuel injectors, fuel lines, or the carburetor) or air intake channels. As such, if you notice surges, you should: Inspect …Troubleshooting a throttle/fuel issue on a FH661V Kawasaki engine. Cranking the engine with choke works and I can idle the engine on low. When I apply throttle, the engine appears to be starving of fuel and will shut off within one minute. I can extend that minute by applying more choke but that's obviously not a working solution.Hello All, I've got a Kohler 26hp, 747cc, 7000 series, KT745, V-twin on a Husqvarna zero-turn. It has a manual choke (cable type). It has slowly started running rough. At all throttle speeds and when warmed up, the engine rpms surge up and down, and at full throttle it pops through the muffler...My mower has the 24hp kawasaki EFI 750 engine and when dropped to idle it slowly settles into a never-ending cycle of pulsing the throttle to try to attain the target idle revs. If you bump the gas up, it cuts the fuel back and settles into the same pattern quite quickly.D. dschell Discussion starter. 21 posts · Joined 2008. #1 · Mar 23, 2009. Hi - I have an older Hustler Z (circa 2002) with a Kawasaiki FH680V engine. I bought the mower used last fall and replaced many of the normal wear and tear parts, such as spark plugs, fuel filter, and fuel pump. I also cleaned the carb and serviced the oil.I just did maintenance on a little John Deere Gator CS with a little single cylinder Kawasaki engine in it. I changed the oil, new plug, air filter, and fuel filter. When I cranked it ran like a top for about a minute or so then it started to run really rough and wouldnt really idle on its own. You could feather the gas pedal and it would run ...There appears to be a steadying in the world of high hotel costs. Travelers (myself included) grimaced over the last 18 months as hotels and airlines throttled rates higher and hig...12. Messages. 164. May 8, 2015 / Kohler CV730 surging problem, dies under load. #1. At idle the engine slows down and picks up (surges). Full throttle there is an intermittent miss, and does not feel as strong as a 26hp twin should. If blades are engaged fuel spray coughs out the carburetor and it chugs down and dies.822. 121K views 5 years ago. I have a Ex-mark with a Kawasaki FH580V 19 HP zero turn that was running rough for a long time. After spending weeks trying …24,705. Oct 26, 2021 / FX730v engine struggling under moderate load. #2. THe usual reason for lack of testicles on a twin is one side dropping out. So the first thing to do is check the temperature of each exhaust pipe after about 2 minutes running. If one is noticably colder than the other then swap the magneto coils.John Deere 112L (Kawasaki FB460V engine) surging. Still using this mower the grandparents bought new in 1985! It started surging last summer at the end of the season so last week I got it out and took the carb off, disassembled/ boiled in lemon juice/ blew out passages with compressed air, and then put it back on. Still surges.24,705. Oct 26, 2021 / FX730v engine struggling under moderate load. #2. THe usual reason for lack of testicles on a twin is one side dropping out. So the first thing to do is check the temperature of each exhaust pipe after about 2 minutes running. If one is noticably colder than the other then swap the magneto coils.The engine started surging yesterday at both low throttle and high throttle. I changed out the fuel filter, no difference. ... '04 Ferris 52" Kawasaki 23 hp w/ Trac Vac '98 Exmark Metro 36" Kawasaki 14 hp ... a common problem that causes engine surging is dirt ingested into air jets. these are usually found in the carb throat behind choke plate ...Swapping out a fuel filter. One of the solutions to fix a surging lawn mower engine is by swapping out the fuel filter. A clogged fuel filter can cause issues with the flow of fuel to the carburetor, leading to fluctuating revving and surging of the engine. If you notice your lawn mower surging at full throttle or the engine surging up and down ...Kawasaki FH430V surging/loping at idle solved! In an attempt to give back to all of you for all the info I have gleaned over the years I want to share some success with this particular motor I had this evening. The motor is a Vert. 15 hp. I bought it used and ever since I had it has always had the dreaded surging at idle or slightly above.Dec 3, 2016 · Engine will run, but it surges, hunts for a constant RPM. 1. Partial Blockage of Main Jet. This is for bowl type carburetors only. Stop the fuel flow to the carburetor, either turn off the fuel valve or pinch off the line with a pair of fuel line pinch off pliers or a pair of vice grips. Kawasaki 921 V lawn mower engine surges and backfires at low speed runs fine when you turn blades on ... I noticed several weeks ago that it wanted to surge and not run at full throttle so the first thing I thought is that I had got some ba ... The mower has started surging when the throttle is at low speed. When I increase the RPMs the surge ...When driving at full throttle engine rpms cut dramatically, then after a few seconds surge back up to full throttle, it does this after running about 300 yards. ... A forum community dedicated to Kawasaki Motorcycle owners and enthusiasts. Come join the discussion about performance, modifications, troubleshooting, maintenance, off …The common causes of 2 stroke bogging at full throttle include using the wrong gas mix, dirty or clogged air filters, damaged spark plugs or barrel gaskets, and damaged intake manifold gaskets. Easy fixes include using the correct fuel, cleaning dirty parts, and replacing the damaged components. These are just a few reasons for two …Jun 20, 2019 · You can try the old school trick of running the engine at full revs and closing the choke until it almost dies. Open the choke and let the engine stabilize. Repeat this process a few times. You might get some good results. If not, the only true way to effect repairs is to disassemble the carb and fully clean it. Kawasaki engine surges at full throttle should require expert consultation. Therefore, it's essential for you to confirm the reason or reasons first to accomplish the project. ... Initiate the steps on how to fix the 17 HP Kawasaki engine surging with the details. Positive results at no expense should recover the original smoothness. Read More.F. fixer67. 3092 posts · Joined 2004. #2 · Oct 20, 2004. Try running without an air filter. These new engines of all makes are running so lean you can not running them without an air filter which makes it hard to do carb work on some of them. On some engines I have had to make a special filter set up to do carb work.Use a 15/64 drill bit and put it thru both holes to hold the throttle in place. Loosen the 2 cap (10mm) at the top of the throttle plate. The holes are slotted to allow you to move the entire plate toward the carburator (slower engine speed) or away from it (increasing speed).Apr 30, 2015 · Nov 29, 2014. Threads. 64. Messages. 24,705. Apr 30, 2015 / Engine runs rough and backfires under throttle. #2. Remove the fuel tank & clean it out. Most likely crud in the tank blocking off the fuel line. How to repair an engine carburetor that surges, hunts, pulses or waffles. In this video, we'll show you how to fix a surging engine on a lawn mower, pressur...17 posts · Joined 2020. #1 · Apr 7, 2021. I'm having an issue with surging right now. Installed 95gph fass and installed 75horse injectors and started to experience a surge, under light throttle and heavy throttle it will surge but while under mid throttle no issues. Have checked all injector lines and fuel lines coming from fass, what else ...The engine sounds and feels bogged down and surges. When I get to the top of the hill I let off the accelerator and I feel like the the tranny reset to normal operation. I park it. The muffler is real hot. Oil is good, water is good. I let it sit for 30 minutes... only the check engine light is on now.A dirty air filter is one of the most common causes behind a leaf blower that is bogging down: the air is enough for the engine to idle, but as soon as you switch to full-throttle, the machine will stall. All we need to do is replace the air filter. To do this, start by opening the air filter cover. Once it is visible, you can have a look at it ...Jun 2, 2018 / Kaw FH721v surging. #1. I have adjusted the valves, adjusted the governor, and thoroughly cleaned all linkage. And rebuilt the carb. It will not run unless 1/2 to full throttle, and is surging constantly. I cannot set the idles while it's running like this.Jun 16, 2020 · Surging is always caused by an air : fuel ratio that is too lean to maintain a constant speed. Only 2 ways this can happen 1) carb not supplying enough fuel 2) air entering the engine after the carb venturi tube has added the fuel. To test for the latter, start the engine, hold the governor arm at whatever place to obtain the fastest smooth speed. The governor shaft on this engine does not have a slot. Issue 2. The manual says rotate the governor arm to open the throttle valve then rotate the governor shaft. For that to happen the governor rod has to be in place on the plate and the plate attached to the engine. With the plate attached to the engine the governor shaft is masked behind ...The disconnect between a stock's share price and the company's performance were writ large during the GameStop (GME) stock price surge. Calculators Helpful Guides Compare Rates Len...

Kawasaki 24hp engine is surging badly. I just purchased a John Deere Z540R with the Kawasaki 24hp (FS730V) engine less than a month ago last week I noticed that it was surging while idling and at low throttle, now it's surging worse and has a light surge even at full throttle. At mid throttle it surges so bad it feels like the engine is about .... Kt pawn shop

kawasaki engine surges at full throttle

Sep 30, 2003 · Short of choking the machine in tall grass or an old machine with worn block, surging is symptomatic of improper and varying ratios of the fuel/air mixtures. The four most common I have found are: The governor spring is broken or in the incorrect adjustment hole. The small spring that takes the play out of the throttle linkage is either broken ... Excessive production of white smoke. Overheating. Fuel filter issues. Faulty voltage regulator. 1. Kawasaki fx730v carburetor problems. Dealing with carburetor problems on your Kawasaki FX730V engine can be frustrating. Let's dive into some common issues and how you can handle them.Surging is always caused by an air : fuel ratio that is too lean to maintain a constant speed. Only 2 ways this can happen 1) carb not supplying enough fuel 2) air entering the engine after the carb venturi tube has added the fuel. To test for the latter, start the engine, hold the governor arm at whatever place to obtain the fastest smooth speed.Jan 27, 2010 · Have an 06 3010 Trans. When driving at full throttle engine rpms cut dramatically, then after a few seconds surge back up to full throttle, it does this after running about 300 yards. I put it in the garage and go full throttle and it does not seems to pull the rpms all the way up. Hopefully someone else a bit more knowledgeable to the poulan pro range will be along soon incase I'm having a daft moment. I have a poulan blower that was giving me trouble only running and starting on full throttle. I ended up pulling out the fuel filter inside the gas tank and replacing it, that solved the issue.13685 posts · Joined 2005. #4 · Mar 30, 2005. Sound like a vacuum leak! This would cause surging I don't know this engine but check to see if the carb has come loose from the intake manifold or if it has a vacuum line check to see if it has came off or rotted. A EZ test is to use starter fluid and spray it between the intake manifold and the ...The main time the loud backfire happens is when starting it. Exactly. Our guys get back at the end of the day and bring the lazers into the shop to change blades. They shut the machine off, jack it up and change out the blades. On start up to move the machines into the back bay, one lazer would back fire, scare the pizz out of the office staff.New-to-me mower (Cub Cadet Commercial Tank) with a 23 hp Kawasaki FH680V-BS18, 270 hours I had a hot start problem, repaired a chafed stator wire, disassembled & cleaned the carb & installed new gaskets, and set the valve lash to 0.004. The hot start problem went away, but now... At idle, it searches/surges around the set …The mule pro fxt ranch edition is back in the shop. Same problem, no resolution. Been out of commission for 7 weeks this Saturday. I have taken it to two dealers (original dealer first) and neither can find the problem. I’m not getting any assistance from Kawasaki at this point, even though it’s still under warranty.12486 posts · Joined 2004. #12 · Oct 25, 2012. Once the throttle bodies are fully open (full acceleration), and the engine RPM's get high, then the injectors must deliver a full flow of fuel. If the fuel pump is getting weak, then the injectors can't deliver enough fuel to keep the engine running properly.Surging Engine. OK, we have a liquid cooled 27 HP Kawasaki engine model number FD750D-S04. It has a very bad surging problem from half throttle and above as long as it is not under a load. Once the blades are engaged or if you drive up a hill it smooths out and runs great. Another thing is it backfires and sputters when we take it from full ...How to Fix: STEP 1- Removal of Throttle: The first step in dealing with the idling problem is to remove the throttle body from your Mule 4010. STEP 2- Scrub the Throttle Body: Next comes the cleaning of the throttle body using a throttle body cleaner. You can spray the cleaner using a toothbrush or a scrub.The motor surges when at idle, revs up, revs down, up, down. Sometimes dies if the throttle is at it's lowest, but will continue to run any other situation. Engage the PTO, everything runs like a dream. Took it to the shop, they changed out the coils ($200), about a week later, same thing. Took it back, they ran it through test after test and ...So if it will only run choked, even when warmed up, it sounds like too much air is getting into the engine.Well, ... with all that being done, try and determine if the engine surges at a fixed throttle setting ( and a throttle setting isn't a throttle setting, it's a governor RPM ….

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