1 d
Kawasaki engine surges at full throttle?
Follow
11
Kawasaki engine surges at full throttle?
Regular oil changes help maintain the engine's performance and extend its lifespan. But there are still states where prices are sky high. Should be a big white decal on the engine with the info on it. Kawasaki 19hp V-Twin Surging Jump to Latest Follow 10K views 47 replies 9 participants last post by flintknapper Oct 9, 2021 Burnie Discussion starter 461 posts · Joined 2012 #1 · Jun 20, 2019 Have an 06 3010 Trans. Therefore, it's essential for you to confirm the reason or reasons first to accomplish the project Almost everyone to own an oil-powered engine has to counter surging issues. I will be putting the carb back in tonight. i have had issues since the first month I bought it. Should be a big white decal on the engine with the info on it. Kawasaki Engine Surges At Full Throttle. If your Kawasaki engine is surging, there are a few things you can do to fix it. Once you get control of the high speed, with the throttle pushed to just before CHOKE, look at the throttle plate and locate the hole that lines up with the throttle arm hole. (before commenting/reply, please read the items I have replaced and checked already. It can occur far from the storm. But after I re-installed the carb, it has been surging only when the blades are off, but still full throttle. This surging happened no matter if at idle or at full throttle. It starts fine, but it surges at all throttle positions. It's not a fast surge but it is consistent, probably a full second to a second and a half between the RPMs fluctuating but the engine will completely die if I apply full choke at high RPM. This also happens when the engine is hot (after 1 to 4 hours of mowing). ) Issue: FR691V V twin motor starts up fine. What could be causing this? Plugged jet? weak fuel pump? Dutch Kawasaki FR730V engine bogging under load is a common problem with this model of engine. If you look how the assembly works the pump draws fuel through the sock and pushes fuel through the upper screen and then to the regulator then to the engine. I ended up draining the gas and putting in some fresh gas I had bought at another gas station. I cleaned the air filter and have just rebuilt the carb and installed a dynojet stage 2 jet kit while I had it apart. It started surging, so I replaced filters, cleaned vent line, removed carb and cleaned. I thought maybe the gauge was reading wrong and the tank was empty even though it needle was pointing to 1/4 tank. com is the largest Kawasaki ATV owner's forum with information for the Kawasaki KFX700, Brute Force, Prairie, Bayou, Mojave, Lakota and older model Kawasaki ATV's! Explore Our Forums. I ended up draining the gas and putting in some fresh gas I had bought at another gas station. Therefore, it's essential for you to confirm the reason or reasons first to accomplish the project Almost everyone to own an oil-powered engine has to counter surging issues. Anybody have an idea of what RPM and/or throttle application I should be using for mowing?. Maybe the float sticking or maybe you have some moisture in the gas. About 90% and above throttle it begins this surge Pushing the throttle further into the choke position the surging stops as if starving for fuel with no black smoke Have adjusted the air/fuel mixture many times even removing the plastic cap for more adjustment but no help. Due to unknown causes, this acute febrile ill. If you close the choke 90% it smooths out and keeps running. have been working on mower for over a month trying to figured out probelm check the small piece of fuel line on fuel pump pressure reg with mity vac 👇Click here for the full video👇https://youtu. It will not run smooth. Would this cause the surging? The engine started surging yesterday at both low throttle and high throttle. Governor rotates up and down. It's the same feeling as if I were giving it small amounts of throttle and then braking (over and over). As for the throttle surge, I thought maybe the governor spring had a bit too much tension on it. Full throttle there is an intermittent miss, and does not feel as strong as a 26hp twin should. So I'm thinking coil is bad. From January 1 to April 30, 2021, fast food restaurants experienced a 33. The exhaust from the small explosion is released into the air from the exhaust port. PM me if you have something you would like to sell. Replaced fuel filter and all fuel line from tank to carb Mar 7, 2015 · Hey everyone, I would love to hear some input/help with a surging idle issue I am having on my 2012 exmark turf tracer. The local dealer cleaned and eventually replaced the carb. It randomly acts like it wants to stall or cut off at low IDIL , but when throttle is up no issues. the mower is not showing any codes. It's linked to the throttle by a spring: once the engine is up to speed, the air pushes on the vane and it pulls on the spring, closing the throttle. png (39KB - 62 downloads) clevepreach: Throttle control on BBC engines. Sep 18, 2017 · BigFish is right. John Deere engine surging is a sign of some element of the fuel delivery system either being restricted or clogged. The manual for my 2021 Bad Boy Maverick specifically states to engage the PTO at full throttle. Will the engine then run smooth or want to die? If it runs smooth, normal, you have a governor issue. Solutions If Your Lawn Mower is Surging Kawasaki 17 horse engine, with 340 hours Menu Today's Posts New posts. Apple has throttled the competition in another category. RPM goes up and down. Flashcards startup Quizlet is now a unicorn, digital textbook company Top Hat is finding unprecedented surges. Customer: No, it mows really well at full throttle, but the surging is concerning at all other rpms. ive had mine apart twice already do clean the carb and blow out everything then started surging again in a few hours. I have an older 35 hp carb version, very thirsty engine and I hate the shutdown backfire. The filter sock is the pumps only defense. When I stopped to open the gate and idled it down, the engine nearly died. Was slow to start and once it did I drove it 100 feet to the truck. Turn choke off and the engine will idle fine for a few seconds then the engine revs up to 5000 rpm or so. Either regular cleanout or replacement is advised Kawasaki Engine Problems: Diagnoses, Fixes, And Tips. These are arguably the main culprits behind lawn mower engine surges. Customer: No, it mows really well at full throttle, but the surging is concerning at all other rpms. Chrome/Safari/Opera: There are a number of solutions for dealing with an inbox overwhelmed with spam, newsletters, marketing emails and so on. Now I have to engauge blades at full throttle or the engine will die. Since then I tightened the low idle adjustment screw which allows the engine to keep running without surging or stalling, but when I went to full throttle, there was no change in engine speed even though the throttle cable is moving the levers on the control assembly. Advertisement In simple ter. Kawasaki small cpsc corp recall engines motors announce gov engine. Once the blades are engaged or if you drive up a hill it smooths out and runs great. When the main jet becomes blocked, the engine will stall at full throttle. it surges past 1/2 throttle. Triple kawasaki ktog owners synchronizing throttle Kawasaki nff damaged supercharged throttle h2 bodies zx1000 spares repair Throttle zx 10r valves response. It idles rough when blades are on also. No fuel leaking from injectors. But when the engine is running, a tiny movement of the throttle lever - less than a half inch either up or down - can cause big movement in RPMs. (before commenting/reply, please read the items I have replaced and checked already. Mule 4010 is a side-by-side. Otherwise, you probably have crud in the carb so under the fender where. So I'm thinking coil is bad. 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. Now the engine also runs rough/sputters/surges under all throttle settings. those passages are normally in the area at or in front of the throttle butterfly if you are looking into the engine side of the carb. Kawasaki zx1000 nff h2 supercharged. Hurricane Florence is expected to make landfall today, hitting the Carolinas and Maryland. Kawasaki engine Zx 10r throttle motogp rapp crt valves officially asphaltandrubber rumores viene nuevo modelo Dreams in boxes-all in. There appears to be a steadying in the world of high hotel costs. I read a few posts on various forums about this issue and have done the following: New spark plugs; new air filter; new fuel filter Jun 20, 2019 · 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. those passages are normally in the area at or in front of the throttle butterfly if you are looking into the engine side of the carb. 6017 e 300th rd martinsville il 62442 To test for the latter, start the engine, hold the governor arm at whatever place to obtain the fastest smooth speed. Never fear: They’re introducing Pulse. Problem 1: Kawasaki 23 hp Engine Surging or Stalling. Seems to idle fine and will drive okay, but with the blades engaged or on a slope it will start popping (I assume backfiring) and the power will noticeably drop. We incorporated the details. Most of the time, surging is caused by a dirty carburetor. From January 1 to April 30, 2021, fast food restaurants experienced a 33. Now that we know how two-stroke engines work, we can move on to determining why your engine is. Seemed better at full throttle but was surging at low to mid throttle and I could not pull the throttle all the way back down without it dying. At mid throttle it surges so bad it feels like the engine is about to stall, the machine only has 7 hours on it The result of this issue is a lot of sputtering, and it will feel like something is wrong with your engine. I joined hoping to find some help on fixing a problem that I have with my scag V-ride with the fx691v Kawasaki engine. The surging of a Kawasaki engine at full throttle is often attributed to several factors. I just purchased a Z540R with the Kawasaki 24hp engine less than a month ago last week I noticed that it was surging while idling and at low theottle, now it's surging worse and has a light surge even at full throttle. marshal mize ford It's like it's dragging a tank. A simple fix for a surging John Deere X300 or any mower with a twin Kawasaki FH491V 17hp engine. 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. Cold starts with a load applied is causing the governor to kick inmost likely masking/overcoming the problem, then when the unit heats up (expands) a possible air leak is sealing up Full Forum Listing. 40hrs - 2017 Kawasaki Ultra LX 1500 non supercharged Engine runs fine at light throttles and full throttle. We may receive compensation from the products an. It runs fine when the mower is engaged and at lower idle We need the full engine codes to make meaningful comments about the carb but you will find the proper cleaning sequence at outdoorpowerinfo I have a 2011 Husqvarna GTH26V52LS mower with a Kawasaki FR730VAS04 engine with a little over 90 hours on it. The latest and greatest Kawasaki Ninja sports all the track features to attract new and experienced riders alike, with lightweight handling and a powerful 399cc engine. The motor would idle any advancement of throttle and it stalled out. I have a 2007 exmark turf tracer hp with a 17 hp kawasaki motor. Has maybe 400 hours. Customer: I have a 1997 John Deere 445 Garden Tractor with a 22hp fuel injected FD620D Kawasaki engine. png (39KB - 62 downloads) clevepreach: Throttle control on BBC engines. When the throttle is turned all the way up, the mower runs okay, but I can tell its not full power move throttle control to full speed, and then. My customer said when he starts the engine. skydeck promo code 2023 Now adjust the idle speed until it's smooth. I put it in the garage and go full throttle and it does not seems to pull the rpms all the way up. These include fuel system issues, air intake problems, and spark plug malfunctions. be/QtCAehETLBEA simple fix for a surging John Deere X300 or any mower with a twin Kawasaki FH491V 17hp engine Engine HUNTING surging REVING pulsating etc FIXED permanently. Jul 31, 2019 · The arm is two parts with one fixed on the shaft from the engine and the other adjusts at mid arm. During the company’s recent earnings call, CEO Tim Cook noted the company’s wearable division now rivals the size of a Fort. Kawasaki just demonstrated a hydrogen-powered internal combustion engine during the Suzuka 8 Hours FIM World Endurance race at Suzuka Circuit in Japan, the first motorcycle maker to do so. Broadcom (AVGO) Surges, Opening the Door to Further Gains. AVGO In my April 13 review of Broadcom (AVGO) I wrote that "AVGO looks like it will rebound from the rising 50-day movin. Governor feeds more throttle when idle drops off. This surging happened no matter if at idle or at full throttle. Removed the hoses to the canister and rode the bike. Seemed to run great. How do they compare head-to-head? Surging and stalling means the engine is not getting enough fuel. Kawasaki engine surges and dies after a few minutes of runn is starving for fuel. The moment I engage the mower deck the RPMs increase and it runs perfectly. The air filter was also clogged. Dirty intake filter, clogged carburetor, restricted fuel flow Exmark Cleaned carb still surging at full throttle Tecumseh lawnmower Share Add a Comment Open comment sort options.
Post Opinion
Like
What Girls & Guys Said
Opinion
53Opinion
In early 2022, at about 400 hours, surging began. But do what your manual states. These include fuel system issues, air intake problems, and spark plug malfunctions. Last weekend my 345 starting missing under load and died. it surges past 1/2 throttle. But do what your manual states. Cleaned the carb a number of times, put parts in, checked vacuum leaks, fuel pump, and nothing would remedy this problem May 23, 2021 · It can be made to run smoothly by adjusting the choke almost all of the way closed. those passages are normally in the area at or in front of the throttle butterfly if you are looking into the engine side of the carb. With the throttle wide open, just driving forward at full speed bogs the engine down really bad, and cutting grass of any height is impossible between how bad the motor bogs down from driving, and how it bogs with. If I hold the hood open to increase air circulation I can complete the mowing session. Jan 14, 2023 · 40hrs - 2017 Kawasaki Ultra LX 1500 non supercharged Engine runs fine at light throttles and full throttle. Regular oil changes help maintain the engine's performance and extend its lifespan. 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 I just bought a 2011 Ninja 250r and it bogs down at 3/4 to full throttle. The users have explained the problem happens after 15 or 20 minutes of operation The governor help control the amount of fuel and air to the engine. Governor rotates up and down. After reinstalling everything, the surging has stopped, but it is Running wide open with minimul throttle control. A simple fix for a surging John Deere X300 or any mower with a twin Kawasaki FH491V 17hp engine. New fuel filter, spark plugs, air filter, gas. Disclaimer: Under no circumstances will proclaimliberty2. Stuck name throttle part thumpertalk knows guessing wondering broke anyone half wide piece metal. The local dealer cleaned and eventually replaced the carb. 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. evermore album taylor swift Is your riding mower engine surging mostly UNDER LOAD at MID RANGE THROTTLE / RPM? Check this somewhat hidden and fragile carburetor linkage spring first bef. Customer: I have a 1997 John Deere 445 Garden Tractor with a 22hp fuel injected FD620D Kawasaki engine. If you're new to motorcycle engine tuning, seek assistance from an experienced mechanic or invest in a tuner for fuel-injected bikes. surges up one second and down the very next second It is worst at idle, but is somewhat present at full throttle. The engine runs fine mowing at full throttle. 2010 Kawasaki FX600V engine. Loosen the 2 cap (10mm) at the top of the throttle plate. A motorcycle with a 1,000 cc displacement is one of the fastest motorcycles you can buy, which is why police o. Now I have to engauge blades at full throttle or the engine will die. Always stored inside and well-maintained. png) Attachments-----98570DDD-4A5D-4394-AF5A-758BFBB57F27 (full). Possible Reasons Your Lawn Mower Dies When the Choke is Off "Why does my lawn mower only run on full choke?!" is something many people find themselves muttering at some point or another. 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. This surging happened no matter if at idle or at full. Basically the engine surges or hunts from idle through full throttle. Learn the causes, and how to troubleshoot and fix this common engine problem in just under 45 minutes to drive trouble-free. However, many problems exist with this one. Jul 23, 2017 · Recently, it started surging and stalling after running for about 30 minutes, whether under load (blades) or not. Motorcycle carbs have a few circuits that effect different throttle positions. The screen has nothing to do with the pump though. aldi cartersville When it comes to replacing an engine, many people consider purchasing a remanufactured one instead of a brand new engine. Ran perfect from 2004 through spring of 2022. The engine as a 17hp kawasaki FH500V twin with 450 hours on the meter The first thing that I looked for is a vacuum leak in the intake and found none in the gasket surfaces but the engine does smooth out when I spray some carb cleaner at the throttle shaft. Changed oil, air filter, emptied carb bowl, cleaned fins, sprayed carb cleaner, fuel filter. Now at full throttle, the engine is running at its best and is in a leaner or optimum fuel mixture mode, thus no excess gas is entering the very hot muffler, so no backfire happens. 2003 Kawasaki FH500V surging at full throttle and smoking After putting in a new plug in #2 and changing the oil (it was full of gas) the engine fired up and was running on both cylinders. the up and down you speak of is considered hunt & surge in the industry and is usually pointing to a fuel and air mixture issue. Find technical downloads such as specification sheets, troubleshooting guides, service data, owners manuals and brochures for your FR691V engine. For example, T-Mobile’s new plan limits you to SD video. How the Kawasaki Transmission positively finds neutral 4 Stroke Engine. Even though the engine runs at full throttle, you are still running on the idle circuit unless the engine is under load. I have a Kawaski FH601V engine on a Bunton riding mower that I can't get the throttle to operate correctly on. trendyporm I have tried replacing the carburetor with an identical walbro unit, changed out the spark plugs, new fuel filer, air filter, new governor spring, new choke spring, new throttle link rod and spring. Not sure on this engine. Some engines will seem to surge when there's no load. goto half throttle and it starts this consistent surge like its starving for fuel but its not a bog just surges up and down at same rate. Starts easily, surges from idle through WOT running Sounds like a fuel/carbureator problem Greg. Disclaimer: Under no circumstances will proclaimliberty2. Same at idle and stopped. This one turned out to be a very simple repair Aug 13, 2023 · Kawasaki throttle zx 10r valves engine Cpsc, kawasaki motors corps announce recall of small engines Kawasaki throttle surge part ii Ktog group throttle synchronizing Feb 21, 2024 · Kawasaki Engine Surges At Full Throttle 21 Feb 2024. Since then I tightened the low idle adjustment screw which allows the engine to keep running without surging or stalling, but when I went to full throttle, there was no change in engine speed even though the throttle cable is moving the levers on the control assembly. Now, your engine has quite a few hours on it, so it might be something more serious. Spray flammable spray around carb and intake pipes slash flanges. In addition, at full throttle when I engage the blades, the engine nearly dies before it revs back up. yes it's surging on the hi and low. i would put my paycheck it is in the carb9% of the time surging is caused from lack of fuel. Kawasaki Engine Surges At Full Throttle 30 Jul 2023. Jan 13, 2024 · Kohler 7000 Series KT745 747cc 26 Gross HP Electric Start Vertical.
that type of surge is normally associated with the idle circuit in the carb. Come join the discussion about performance, racing, modifications, troubleshooting, maintenance, and more! Show Less Explore Our Forums. 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. Kawasaki zx1000 nff h2 supercharged. Once the blades are engaged or if you drive up a hill it smooths out and runs great. The Kawasaki KLX 110cc dirt bike has a top speed of just over 50 miles per hour The throttle body is an important part of the vehicle that allows air to flow into the engine. A new study on Uber surge pricing says that it causes prices to go up without attracting more drivers By clicking "TRY IT", I agree to receive newsletters and promotions from Money. How the kawasaki transmission positively finds neutral 4 stroke engine Stuck name throttle part thumpertalk broke guessing wondering knows anyone half wide piece metal open if Throttle zx 10r valves response. weather nyc 10031 these are usually found in the carb throat behind choke plate. Loosen the 2 cap (10mm) at the top of the throttle plate. Any change and no sensor = dyeing out engine. When the main jet becomes blocked, the engine will stall at full throttle. adp punch clock I suspect the Throttle sensors may be the real issue but I dont have the. Always stored inside and well-maintained. If you bump the gas up, it cuts the fuel back and settles into the same pattern quite quickly. It idles rough when blades are on also. r1 skins promo code Sep 26, 2007 · hal. Even though the engine runs at full throttle, you are still running on the idle circuit unless the engine is under load. Cleaned the carb a number of times, put parts in, checked vacuum leaks, fuel pump, and nothing would remedy this problem It can be made to run smoothly by adjusting the choke almost all of the way closed. 2010, no sure about model of engine. A 110cc engine can reach various speeds depending on which automobile it’s inside. Stuck throttle/part name? Cpsc, kawasaki motors corps announce recall of small engines Engine management Jul 10, 2021 · i have been fighting this for a while FR600V surges when first started.
Dreams in boxes-all in. Hi like I said the 547cc efi engine is surging when started at full throttle at low throttle it's fine when pto is engaged it's fine no idea why a brand new mower would do this. When it comes to replacing an engine, many people consider purchasing a remanufactured one instead of a brand new engine. Engage the PTO, everything runs like a dream. Never fear: They’re introducing Pulse. At idle, it searches/surges around the set 3600 rpm idle speed Jun 26, 2021 / Engine surges after starting and eventually stalls #1 My zero turn Raptor Hustler surges and revs up and down after started. Ran perfect from 2004 through spring of 2022. What could be causing this? Plugged jet? weak fuel pump? Dutch Kawasaki FR730V engine bogging under load is a common problem with this model of engine. Kawasaki zx1000 nff h2 supercharged. A hurricane's storm surge has the potential to catch people off guard. There is an extra hole in the gov lever where I figure the spring went. I did all the routine things I could think of. How the Kawasaki Transmission positively finds neutral 4 Stroke Engine. Apr 5, 2024 · Kawasaki Engine Surges At Full Throttle 05 Apr 2024. I recently acquired a John Deere LX 279 mower with a Kawasaki V-Twin 17hp engine for free, quite a win in my books I had to adjust the idle to be quite high or the engine violently surges. Equipped with the same engine size, the. RPM goes up and down. Transmission kawasaki Time lapse: disassembling a kawasaki engine 310r divisions motorcycle jetski punishment corporal watercraft watercraftjournal corp restructuring ceo. I usually shut it down after a couple of minutes, swear a little, go away for a bit and when I come back, it starts and runs as it should. windshield wiper fluid homemade Once you get control of the high speed, with the throttle pushed to just before CHOKE, look at the throttle plate and locate the hole that lines up with the throttle arm hole. My yazoo zero turn is powered by a Kawasaki FX691V engine. Now at full throttle, the engine is running at its best and is in a leaner or optimum fuel mixture mode, thus no excess gas is entering the very hot muffler, so no backfire happens. I recently acquired a John Deere LX 279 mower with a Kawasaki V-Twin 17hp engine for free, quite a win in my books I had to adjust the idle to be quite high or the engine violently surges. These are arguably the main culprits behind lawn mower engine surges. Jul 31, 2019 · The arm is two parts with one fixed on the shaft from the engine and the other adjusts at mid arm. The moment I engage the mower deck the RPMs increase and it runs perfectly. Each one of these seven cheap large-cap stocks to buy could make a strong recovery, once external worries clear up. The day before it would only reach 40, the day before that it ran full speed. I have a Gravely ZT HD 52 with a Kawasaki FR691V and having some issues at low IDIL. My 2012 Cub Cadet Z-force-S 48 with Kawasaki engine has always started with very little choke, run well at high speed, did not slow down much when throttled down to idle, and seemed to run rich since I bought it with 167 hours in 2016 The engine runs steadier at full throttle but still surges a little, so I drove it back in the barn The ZT is equipped with the 852cc Kawasaki FX850v engine. FJ180V KAI Engine Specifi cations used by Ybravo: "M22" used on 21" Zone Start - 3300 RPM As the title says, the engine-Kohler 18hp on my 2000 model year 3184 is surging and then dying at low idle when it warms up after a few minutes. No fuel leaking from injectors. The users have explained the problem happens after 15 or 20 minutes of operation The governor help control the amount of fuel and air to the engine. Spray flammable spray around carb and intake pipes slash flanges. 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. Stuck throttle/part name? Cpsc, kawasaki motors corps announce recall of small engines Engine management Jul 10, 2021 · i have been fighting this for a while FR600V surges when first started. I drained the fuel tank and filled with 92 ethanol free. lcsw practice questions If I rev the engine up, it clears up and runs smooth at higher RPM (past 1/2 throttle). If so, we can rule out a fuel delivery issue,. Aug 2, 2021 · My engine is is surging steadily , doesn’t react to we 40 around the manifold and does shut off when the solenoid plug is pulled Ect. I have only used 100% gas. Coastal water is expected to rise up to 12 feet in some areas. Sometimes the governors are internal to the engine and use oil, sometimes they use an air vane by the flywheel fan. (The piece that the throttle cable attaches to. I haven't experienced this on the smaller Kawasaki engines sold with Exmark (98570DDD-4A5D-4394-AF5A-758BFBB57F27 (full). Broadcom (AVGO) Surges, Opening the Door to Further Gains. If the engine will idle but dies at full throttle the main jet in the carburetor may be plugged. 06% rise in the number of visits nationwide. Any change and no sensor = dyeing out engine. Jan 11, 2011 · I believe it's either a 16hp or 17hp on a 48" Exmark TTHP probably 7 years old. Took it to the shop, they changed out the coils ($200), about a week later, same thing. The moment I engage the mower deck the RPMs increase and it runs perfectly. Normally it is just used for mowing so it runs at full throttle most of the time. A simple fix for a surging John Deere X300 or any mower with a twin Kawasaki FH491V 17hp engine. The rest of the time, it runs fine!. Apple has throttled the competition in another category. The rpm goes up and down 100 to 150 rpm just idling with blades off Sometimes they get full of debris restricting fuel flow. Changed air filter ,fuel filter,and plugs May 1, 2015 · Below is a short video of what is had been doing. RPM goes up and down. It has the Kawasaki FR651V engine.