Kawasaki engine surges at full throttle

Oct 2, 2019 · i am struggling to figure out this problem. Basically the engine surges or hunts from idle through full throttle. I researched and done all the things that I’ve seen suggested. 3 different carbs. Current one is brand new. Still surges. Fuel pump works. Fuel lines clear.

Kawasaki engine surges at full throttle. 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.

1. Make sure the carby is clean internally, just because it is new is no guarantee. 2. Hold the governor open to full throttle, if the engine is able to accelerate and maintain higher revs, then the engine is getting sufficient fuel, so the main jet is not the problem and neither is fuel flow from the tank. 3.

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 ...Firstly, check to see that the carburetor is securely attached to the engine. Secondly, with a running engine, spray engine starter onto the gaskets and listen for a change in the surging. The engine starter spray will immediately have an effect, replacing the air being sucked in with a combustible substance.Aug 16, 2011 · 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 ... The engine has been surging in my SCAG for over a year and after eliminating fuel filter fuel pump, and air system as the problem, I found what was really ca...15 posts · Joined 2018. #1 · Oct 30, 2018. I have a Dixie Chopper Magnum 2250 with a Kawasaki Fs651v engine. It is surging and does not idle up above 3550 rpm with the blades off. The rpm goes up and down 100 to 150 rpm just idling with blades off. It idles rough when blades are on also. I have put a new fuel filter, plugs, and air filter on it.invader. 8182 posts · Joined 2008. #4 · Aug 11, 2013 (Edited) Yes it is a lean hesitation/lurch/surge at slight throttle opening and mostly at near 2800 rpm, and you can cure it by rotating the main (lower) throttle sensor slightly counterclockwise. Stock setting has the TPS voltage output at under spec range at WOT.

Watch at proclaimliberty2000 how fixing a small engine that's surging might be easier than you think.Disclaimer: Under no circumstances will proclaimliberty2...Throttle control on BBC engines. The methods for checking and adjusting RPM and Full Throttle position is the same on all the Kawasaki FJ180V engines. We are illustrating the procedures on the BBC engine for clarity. FJ180V KAI Engine Specifi cations used by Ybravo: "M22" used on 21" Zone Start - 3300 RPM345 Surging at mid and low throttle. Last weekend my 345 starting missing under load and died. Was slow to start and once it did I drove it 100 feet to the truck. It acted like a fuel issue (starving) and I had another filter in the truck so I dropped it in. Seemed better at full throttle but was surging at low to mid throttle and I could not ...since you are only getting a surge during full throttle and no codes, have you tried cleaning out the injector body throat? Pull the injector and clean it with ...Jan 3, 2012 · So I have the engine in and running. It runs well on full throttle and with the blades and drive going, but at low speed it surges and hunts. I accidentally read the tappet clearance wrong from the manual and ground way too much off the valve stems .040 instead of .004. Would this cause the surging? Aug 21, 2017 / FR691V 24 HP surges and dies under load and or when hot. #2. Something most folks never consider is the fuel hose has braided nylon string in the middle of the hose. The hose can feel strong, not soft spots anywhere on it's entire length. However, a fuel hose can have a small spot anywhere on the inside that turned loose from the ...22hp Kawasaki engine surge. I have a 22hp kawasaki FS651V that surges at any throttle or choke position, with or without blades engaged. Runs very rough. Machine has 220 hours. 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 ...Carburetor Tuning for Kawasaki Triples. This manual can be downloaded in PDF format (4.8M) ... Plug chop after full throttle operation is required to determine the best size for main jet. Too small a main can damage the motor. ... A lean setting will cause your engine to surge at very low RPM's, bog or cut-out when the throttle is opened ...

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.Z781 Kawasaki engine hydraulic mower shuts down after 1 hour mowing ... I have a ferris is 3000z mower with kawasaki fd731v engine. i noticed in idle with throttle half to full the engine surges, if i engage the blades or move forward it stops, so it doesn't happen while ...Check or replace them. Also, Check the air cleaner (s) If the jets get clogged, this can put too much raw fuel into the combustion chamber fouling he plug at initial acceleration, clears up when the engine gets runnign faster. this will show up as black deposits on the plugs. Also try taking it to the dealer mechanic.Showing how I fixed the surging engine on a 24hp Husqvarna gt52xlsi lawn tractor, basically these seem to all have bad o rings on the two jets and replacing ...I have a Briggs 10hp model 28b707 with a Walbro 5-4993 LMT carburetor on a Snapper 5R1026 riding mower. The engine constantly surges or hunts except on full throttle. If I partially close the choke th … read moreThis 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 ...

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Tractor. JD X728. I am struggling with an engine that is surging at all rpm's. It can be made to run smoothly by adjusting the choke almost all of the way closed. 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 ...Have tried obvious... secondary throttle valves, ok, movement ok, TPS ok, other sensors ok, Next step is to "fool" the EFI and bypass the O2 sensors and make a false sinus signal that keeps the fuel more or less steady. Not sure if the "ratchet effect" is applicable here. Don't know if the EFI has a learn mode.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.D. Dutch515 Discussion starter. 68 posts · Joined 2008. #1 · Aug 26, 2008. Ive got a JD LX188 with a kawasaki v-twin liquid cooled engine. At low rpm the engine surges from high to low rpm. When the throttle is open all the way it doesnt. After running it and mowing for 10 min, it starts to surge even at full throttle.Kawasaki V2 engine problems. I have a Husqvarna AWD ride on with a Kawasaki FH531V 18.0 engine, done 520 hours. Motor started running rough about 2 months ago, was fine at full throttle under load but rough at idle and half throttle. I changed spark plugs, cleaned air filter, cleaned fuel filter but problem continued.2003 ZX6R (UK, European model), Akrapovic slip on, PCIII, stock airfilter, KLEEN air suction valves removed and blanked. Throttles balanced. No obvious air leaks. No FI errors. The bike idles fine. It runs fine with clean fuelling throughout the rev range. But there's one exception. With the...

Leon Cooperman defended short-sellers and decried attacks on the wealthy as he said the GameStop surge would "end very badly" for the public. Jump to Billionaire investor and hedge...*Get The Red Coleman Mini Bike: https://amzn.to/2CJemQj**Get The Black MM-80 Mini Bike: https://amzn.to/2Rk7FbASolved the RPM surging issue with my Kohler Pr...No fuel leaking from injectors. Cranked engine and observed nice spray pattern onto a rag. 5. Throttle body clean - via spraying an entire can of cleaner directly into the throttle body while assistant has accelerator to the floor - seemed to work for 60 seconds and then back to terrible idling and engine died. 6.Once the engine warms up and at full throttle the surging is still noticeable. Surging is generally indicative of a lean fuel condition. Be sure there are no air leaks at the intake manifold. The easiest way to check this is to spray Wd40 (or similar) around the intake manifold while the engine is running.Corey King said: 2012 Brute Force 750 surging half throttle. 2012 efi Brute Force 750 4000km. swamp exhaust. power commander 5 (custom map vforce john) Primary Red spring (vforce john) K&N air filter with breather box hood with fine screen filter. Recently by bike when I go above 1/4 throttle it starts to surge.Messages. 2. May 8, 2015 / Surging on new Briggs. #1. I bought a zero turn mower with the 25 hp Briggs professional series engine (model 440000) that is 6 months old and has 8 hrs on the clock. After I changed the oil to 5w-30 synthetic, it started surging when it is not under load. Is this just a coincidence or could changing to synthetic oil ...Check the Air Filter: The most common reason why an engine bogs out under acceleration is because the air/fuel mixture is 'dirty' or inefficient. If the air filter is clogged or has a lot of dirt in it, it could be bogging down the engine. Clean …Kawasaki FX801V Surging. I am working on this Zero turn and it is surging. Someone has already screwed around with the governor and I went through following the repair manual to adjust it. It still surges at full rpm and if I give a little choke it does not help. (the customer rebuilt the carb as well) I am thinking that the governor inside the ...

John D Kawasaki engine 17 hp surges. anybody have any thoughts. Thanks a lot, Deeremoonkid. My F525 (17 HP Kawasaki) does that at idle after I fuel it. I fuel it & drive it about 100' to the shed, 1/2 throttle or less. The rest of the time, it runs fine! ~~ grnspot110. Thanks, appreciate it. could be as simple as the vent in the fuel tank cap ...

Locate the limiting mechanism by lifting up the cargo bay at the back, finding the black metal cover which is riveted over the governor (has the throttle rod going underneath it from the carburettor), drilling out the three rivets and removing the metal cover. Find the parts that resemble this:Hey everyone, I would love to hear some input/help with a surging idle issue I am having on my 2012 exmark turf tracer. 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 ...Hi all and restrorob!! Restro, I have read alot of your posts on this problem and wanted your opinion. The engine runs fine mowing at full throttle. This is a John Deere Quicktrak 647 with 19 hp vert. Then it will surge under no load. I went to the my shop took check it out further. Changed air filter ,fuel filter,and plugs. Same thing.Dry Weight. 153.7 lbs (69.7 kgs) 90° V-twin. Integrated electronic throttle control. Pressurized lubrication system. Electronic ignition with variable spark timing. Sequential multi-port fuel injection. Compact electronic control unit. Proven open-loop design.Kawasaki Motorcycle Forums. Kawasaki Motocross and Offroad. kx500 power surges.!! runs on after throttle is shut. why.? 2109 Views 3 Replies 4 Participants Last post by CROGG, Sep 10, 2005. J. jdv500 Discussion Starter · Nov 8, 2004. Add to quote; Share Only show this user. hello, i'm a 41 yr old rider with my 1st kx500 here, bought the bike ...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...Jun 19, 2022 · Step by Step!Today we'll be working on a Cub Cadet LTX 1142 KW riding lawn mower that has a Kawasaki FR600V engine.My customer said when he starts the engine...

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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.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 ...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. Watch at proclaimliberty2000 how fixing a small engine that's surging might be easier than you think.Disclaimer: Under no circumstances will proclaimliberty2...1. Kawasaki Mule Pro FXT Engine Problems: Engine issues in the Kawasaki Mule Pro FXT can occur due to a variety of reasons, such as improper maintenance, wear, and tear, or fuel-related problems. Wear and Tear. The engine in the Mule Pro FXT is subject to wear and tear over time, which can cause it to fail.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.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. Start by tightening all the bolts around the carburetor: these can work loose after being subjected to engine vibration, letting the carburetor separate from the head. If the engine is still surging, inspect the ...Jun 8, 2020 / Kawasaki FH601V surging / loping at high rpm. #1. I bought a well cared for JD 717a mini z Trak 48" mower last year. It's old but it is in fantastic shape. 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 struggle to maintain ...Hi Guys, I have a 61" Scag Turf Tiger that has the 27hp Kawasaki Engine (FD750D). The engine has a surge where the RPM will go up and down at idle. The throttle position doesn't seem to matter. It runs a bit smoother at full throttle but still surges some. When surging if I look at the side of the carburetor I can see the throttle plate fluctuate.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.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. ….

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.136 posts · Joined 2010. #2 · Apr 1, 2011. 1) The Seafoam needs to go into the gas BEFORE the bike sits. It will prevent the build up of gunk in the carbs. The way you did it the old gas sat in the carb bowls depositing the crap, then you put the seafoam in to clean it up. Prvention is better than an attempt at a cure.Watch the throttle surge up & down.If I hold the choke at 90% closed it smooths out.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.New Kohler 6.5hp SH Series surges intermittently at full throttle. Mechanic's Assistant: ... 22 years and 4 dealerships.Deere,Cub,Stihl,Kohler,Kawasaki,Briggs.Seen and repaired all of it. ... i have a cub cadet zero turn with a kohler 7000 series engine that surges. I have replaced carburetor, fuel filter , spark plugs with all kohler parts.Aluminum flywheel Aluminum drive shaft ECU flash tuner Cold air intake Large bore throttle body The 5.7 HEMI engine is available in the Dodge, Chrysler and Jeep vehicles, making it...Video showing the common methods of installing throttle and choke cables on both the auto choke and manual choke engines, how to adjust them and how to chang...114 posts · Joined 2014. #7 · May 5, 2017. Piston Slapper, I have a similar issue with my Kawasaki FH541V - it starts quickly but will surge heavily at idle or full throttle with no load or surge slightly with blades engaged if given anything less than 3/4 choke. I've thoroughly cleaned the carburetor twice, new fuel filter, air filter, etc. Kawasaki engine surges at full throttle, Cadence Design Systems (CDNS) Has the Right Tempo for Further Upside...CDNS Shares of engineering and software company Cadence Design Systems (CDNS) have surged in the past couple ..., Loosen cable retainer screw (F). Move throttle arm (E) and throttle cable (H) to align holes in control panel and throttle control plate. Insert a 6 mm (1/4 in.) bolt (G) or drill bit through holes to keep throttle arm from moving. Be sure bolt or drill bit is perpendicular to the control panel., The Kawasaki Mule 4010 throttle body cleaning process involves removing the throttle body, removing any loose debris, spraying with a throttle body cleaner to remove all oil and grime then reinstalling the throttle body. ... Engine surges; Poor fuel efficiency; If you notice these Kawasaki Mule 4010 fuel pump problems, start by implementing a ..., 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 …, Reason 1: High Float Level. Your Predator 212 will sputter at full throttle if your float level is high. The fuel level in the carburetor bowl is controlled by the float level. Sputtering can occur when the carburetor is flooded at full throttle by a high float level. Furthermore, if the float has a hole, it sinks and doesn't regulate the ..., Video showing the common methods of installing throttle and choke cables on both the auto choke and manual choke engines, how to adjust them and how to chang..., The labor costs will be anywhere between $150 and $300, depending on the hourly rate of the mechanics and the amount of work it takes to access the throttle position sensor. In total, you can expect to pay between $250 and $400 for a throttle position sensor replacement. Since replacing the TPS is fairly easy in most cases (depending on its ..., That is the shark fin looking thing on the front of the air box lid. As the engine is running and you have your hand cupped over the opening, press the throttle to see if the popping gets worse ..., DF20A rpm's drop and surges. 07-27-2020, 02:18 AM. I have a 2019 DF20A which is 1 year old and about 75 hours on it. The motor starts and runs perfectly at low speeds. When I fully open the throttle it runs perfectly for about 10 - 11 minutes and then the rpm's drop from 5900 to around 52-5400. If I pick up on the throttle lever 1/16" it picks ..., txgrassguy. Remember that air cooled engines actually heat up a bit at idle and this may be a cause for the back firing. Unburnt fuel is ignited from the heat in the cylinder which can cause the back firing. The idea behind shutting a motor off at full throttle is the unburnt fuel is dumped into the cylinder actually cooling it down somewhat., 1,851. May 28, 2015 / Two Kawasaki Engines that Dip and Surge at Idle. #3. Get some Sea Foam fuel additive and give a strong dose to each machines fuel tank. The RPM your machines are running at seems high for low idle. As a carb makes the transition from the low speed system to both the high and low speed system, engines tend to vary RPM., Firstly, check to see that the carburetor is securely attached to the engine. Secondly, with a running engine, spray engine starter onto the gaskets and listen for a change in the surging. The engine starter spray will immediately have an effect, replacing the air being sucked in with a combustible substance., 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., kbeechler. 11 posts · Joined 2022. #9 · Nov 8, 2022. I'm reading about the Kawasaki FJ180V surge, I have a brand new machine, straight out the box, it too surges during load, it idles beautifully.. it will really surge at full throttle, but if I back it off to about 3/4, it surges very little.., Aug 21, 2017 / FR691V 24 HP surges and dies under load and or when hot. #2. Something most folks never consider is the fuel hose has braided nylon string in the middle of the hose. The hose can feel strong, not soft spots anywhere on it's entire length. However, a fuel hose can have a small spot anywhere on the inside that turned loose …, 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., N. W. Indiana. Tractor. Kioti CK3510SE HST, Ford 3400, Gizmow ZTR, Simplicity 7016H. Rdrcr said: I recently purchased a new Cub Cadet Pro Z 560 S KW and I’m trying to figure out what RPM or throttle amount I should be applying when I mow. The ZT is equipped with the 852cc Kawasaki FX850v engine., 15 posts · Joined 2018. #1 · Oct 30, 2018. I have a Dixie Chopper Magnum 2250 with a Kawasaki Fs651v engine. It is surging and does not idle up above 3550 rpm with the blades off. The rpm goes up and down 100 to 150 rpm just idling with blades off. It idles rough when blades are on also. I have put a new fuel filter, plugs, and air filter on it., 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 …, When these sensors go bad they can omit false information causing the computer to make incorrect adjustments which produce an engine surge. Sometimes you can clean the MAF which can help but we have found replacing the mass air flow sensor is best. This problem does not cause a trouble code because the sensor is still within its …, Kawasaki Mule 4010 won't run full throttle Please help. I have an 09 Mule 4010 gas engine. I bought it from an older lady who didn't use it for a year or more. It will crank and run at slow speeds about half throttle but will backfire and not run if I press the pedal all of the way down. I drained the fuel tank and filled with 92 ethanol free., 5 posts · Joined 2014. #1 · May 25, 2014. My Hustler 60" deck Mini-Z has a 23HP kawasaki FH680V engine that has a problem no one has figured out. It has run great for 750 hours but now after about 15 minutes of operation under load the engine starts to surge for 20-30 seconds and then shuts off. I noticed that the governor arm goes up and ..., I recently replaced the throttle cable on my Deere 757, (25hp Kawasaki engine). Now it seems to idle high and run hot. - Answered by a verified Technician ... Hello Curtis I have a John Deere Z910A mower with a Kawasaki engine that cuts just fine but the engine surges at idle and full throttle., This happens on cold start about 25% of the time. When it does, if I pull the choke all the way out for a second and then push it all the way back in, it usually clears up, but not always. If I rev the engine up, it clears up and runs smooth at higher RPM (past 1/2 throttle). This also happens when the engine is hot (after 1 to 4 hours of mowing)., Jul 31, 2017 · Full throttle bog hesitation - What causes it and fixes. 2012 T4 here.. Sand mud and water can make its way into the tank from three locations. One: The fuel tank vent. This has been covered extensively on how to mod it. I have done this to mine and I suggest you do it to yours immediatley if not already done. , 136 posts · Joined 2010. #2 · Apr 1, 2011. 1) The Seafoam needs to go into the gas BEFORE the bike sits. It will prevent the build up of gunk in the carbs. The way you did it the old gas sat in the carb bowls depositing the crap, then you put the seafoam in to clean it up. Prvention is better than an attempt at a cure., While cutting under full throttle and deck clutch engaged, the motor runs great. When I disengage the clutch the engine/governor surges up then down regardless of the throttle setting. I have put in new gas along with some SeaFoam cleaner, full tune up (plugs, air filter, fuel filter, oil change) and checked the gas cap., 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., My Husky GTH2248 with the two cylinder Kawasaki engine just started surging at mid to full throttle…but only when the mower is not engaged. The moment I engage the mower deck the RPMs increase and it runs perfectly. Disengage the mower and the surging returns Any ideas? Pete, O.S. Engines Support - Pumped OS FS-91 surges at full throttle - I have a pumped OS FS-91 which is running erratically at full throttle - it surges. It will run well for awhile leaving a visible smoke trail but then it sags and the trail disappears. This happens erratically. Sometimes I can get nearly a fuull flight, 1. Make sure the carby is clean internally, just because it is new is no guarantee. 2. Hold the governor open to full throttle, if the engine is able to accelerate and maintain higher revs, then the engine is getting sufficient fuel, so the main jet is not the problem and neither is fuel flow from the tank. 3., 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., It violently surges at full throttle. Runs fine at idle and mid-throttle. I have done all I know, and now am stuck. Background: I recently purchased a used 1997 Craftsman GT, 917.258921, with a 25hp Kohler Command Twin, hydrostatic drive, and 50" deck. Engine is CV25S, Spec: 69511, Serial: 2633205137.