Kohler engine idles up and down. Here is my situation. Using lower-grade fuel on the engine 5. just touch the throttle and it goes crazy. The first thing I tried is pulling off the carburetor and cleaning it, but no Kohler Command pro 15hp that wont idle smoothly. put it all back together and it started right up. As you begin mowing unruly patches of grass, dead leaves, and the occasional twig, your lawnmower simply stops. My engine is running at to high idle speed will not slow idle what can I do. Inspect the throttle cable and linkage for binding or damage. He installed and after a few mowings I noticed there wasn't the power. A fix for a surging generator while it is under load is not necessarily what will fix a generator that is revving up and down at idle. Access the Kohler Engine troubleshooting guide. If your mower engine is a Honda or Kohler, the fix is simple. OK, now I've got a new question concerning the correct RPM setting for this engine. 9K subscribers Subscribed This article takes a top view of some of the problems that you might face with a Kohler diesel engine. Problem; when i try to give it gas, the engine goes to bucking and missing something horrible. I was given a cub cadet ltx1050 tractor with a sv730 Kohler engine. Any Kohler engine with a fuel shut off solenoid on it should be shut off at half to full throttle in order for the system to perform correctly. If that's the case, the engine will idle down when cold, but when hot, the perfect mixture and reduced friction of a hot engine will allow it to run faster with the same throttle opening. Show you how to adjust Kohler Governor. This is a late 90's model Scott's lawn tractor with a Kohler engine. Any thoughts? A couple videos of he behavior: I am performing this fix on a Kohler 7000 series engine. did I put together wrong, is it a gasket issue? This video illustrates the static governor adjustment for KOHLER vertical crankshaft twin cylinder models CV, ECV, SV, KT, and ZT. I So I lower the throttle lever and drive home at about half speed. You use air and carb spray and copper wire or soft cheap metal zinc spring like I do. Explore Kohler engine troubleshooting guide to fix starting, fuel, and performance issues, ensuring reliable operation and longer engine lifespan. this was the problem :clapping: took the top off and blew the jets, ports and every hole I could find sprayed some carb cleaner in my eye, knocked over the old oil bucket and ripped my shirt on a tailgate handle on the way to the sink while screaming and clawing at my face like a 7th grade cheerleader. I planning to use a digital rpm meter We have a video from Kohler that tells you to open the throttle wide open, adjust the governor screw and then it should be good. The first thing I tried is pulling off the carburetor and cleaning it, but no I have a Kohler Command 7000 KT725(2017) and need to check it's high speed at 3600 rpm. I get home and try to bring the rpms down to idle and it starts to die, so I raise it up a little and it will idle a little higher than normal but the rpms are still going up and down constantly. By watching this video, you will see the fix to my surging motor. It runs excellent otherwisejust got done mowing 2. It's fine with the mowing deck engaged, but it surges when driving slowly or setting and idling. This guide provides simple solutions! Investigating the root of the problem is the first thing to do before looking for a fix for surging issues. Trouble with your Rehlko Engine? Use a systematic approach to identify and correct issues. It will start back up, but repeats itself if tested under true A subreddit to discuss maintenance and the repair of small engines, including mowers, tillers, chain saws, grass trimmers, and other small machines that make life easier. Put all that back together and still getting a surge at low idle and a little backfire through the carb. Anything less and it backfires. Cub Cadet 54sx Z-Force. Feb 14, 2026 · Limited fuel supply, ignition system issues and air filter blockage are the primary reasons for Kohler EFI engine stalling. I believe this could be your issue if you have one of these courage motors on your mower. Can anyone Got a Kohler 26hp SV735 on a Cub Cadet that's been sitting outside for a while. Watch as I show you how to remove and fully clean the carburetor as well and reinstall and tune it. How do adjust since there is no high speed idle screw? See bottom pic. The Governor helps your engine respond to loads and keeps engine from When winter gives way to spring, it’s time to clean up the outside for garden and barbecue get-togethers. It's been flawless this far, but it's developed a surging problem when the engine is running and not under load. Please su At idle the engine slows down and picks up (surges). Are you having to add choke to keep your Cub Cadet running? Is the idle and off idle rpm surging? Well, you have a lean condition and here is the fix. The choke plate is coated black. Are there any known issues to be on the lookout for? 25HP Kohler Command runs-on ("diesels") and backfires upon hot shutdown, even if allowed to idle several minutes. I have a Troy-Bilt Zero turn with a Kohler 7000 Engine and Walbro Carb. Please su Hi all, I hope one of you fine folks have a suggestion or two for me. The mower sat for one season. Make sure the idle speed screw on the carb. It’s a kohler 34 hp model kt735-3012 2014 how to fix a Kohler command CH18-CH25 running rich and rough idle Can't Kill Me 5. Some of the reasons might be: 1. I can push the throttle closed with my finger right on the carb, but if I let go, it goes back to wide open. If troubles persist, contact Rehlko Customer Service. I have a kohler on a toro recycler. There are quite a few reasons why your Kohler engine loses power under load. Insufficient amount of fuel consumption 3. Full throttle there is an intermittent miss, and does not feel as strong as a 26hp twin should. It has a Kohler CV-15 single cylinder engine. Thi Trail Boss 6x6 Kohler 295 2 stroke runs and works good, tires are excellent, has new belt. If your post gets flagged or not posted, send a message to the mods, and we'll review it. Runs fine at idle and mid-throttle. That engine most likely has a governed idle. 5 acres of grass in under two hours and under a two gallons of fuel. I have a snapper 1650. A head gasket was blown, so I replace them both. :laugh::laugh::laugh: it's fixed and I now know how the carb works. Changed: - Air filter - Spark plugs - Drained and filled new gas Starts up just fine but after 2-5 seconds it starts "surging" reving up/down. A subreddit to discuss maintenance and the repair of small engines, including mowers, tillers, chain… Find the most common problems that can cause a Kohler Small Engine not to work - and the parts & instructions to fix them. $1700 cash Now it will run, but always revs high and throttle will not control how high it idles, but all linkages are intact (that i can see). It has just under 400 hrs on it. Also elucidated are the symptoms of and fixes for these problems. Honda and Kohler’s surging is commonly caused by a blocked idle jet see “Gas starvation” towards the end of the page. The engine started to sputter and die when I ran it for 5 min. just replaced left hand side transaxle, I originally lost power then replaced oils in transaxle. I first noticed this shortly Kohler Command pro 15hp that wont idle smoothly. ” If your surging mower is a Honda, check out the “Honda mower surging video. Before working on engine o Does your head flare up when your Kohler engine dies when hot? Today, we’ll go over how to solve this issue of yours. Engaging the blades puts enough strain on the engine to pull the rpms down enough to make me comfortable mowing with it, but disengaging the blades makes it sound like it is winding up and getting ready to explode. xt675-2034 it wouldn't start so I drained the fuel system and removed and cleaned the carb. Troubled by your Kohler engine's common issue of running, then dying? Discover easy fixes and instructions to resolve this problem and keep your Kohler engine running smoothly. Mechanic found a lightly used Kohler 25 command on a tractor. Efficiently address issues for optimal equipment performance with expert guidance. Hi guys, I have a 2015 cub cadet with a 22hp KT725. Bad governor? Kohler 7000 Series Carburetor Problems: Carburetor issues can cause engine performance problems, such as rough idling, poor acceleration, and difficulty starting. Inputting inappro Jan 29, 2019 · If your mower engine is a Honda or Kohler, the fix is simple. Brains trust I need help…. It will not idle when started, it just goes to wide open. Like a 4 cylinder motor running Kohler Governor adjustment step by step . 16 hp kohler single cylinder. But as soon as we start it the engine revs to the moon and we have to shut it off. Idles fine no noise, no smoke, smooth. Governor adjustment has been done no change. Fuel levels 4. thanks Phil The engine when not under load runs on the idle circuit of the carb, but if that system is partially or fully clogged, the engine can't get enough fuel to run at that rpm, the rpm's start dropping and the governor spring opens the throttle which causes the engine to get fuel from the high speed jet. The Kohler online service manual states when running a vacuum test to do so at 3750 RPM but under section 11 "reassembly" Intended Maximum RPM with 2 categories: High Idle 3888 3780 3672 3564 3456 3348 3240 3132 3024 WOT 3600 3500 3400 3300 3200 3100 3000 2900 2800 Discover common reasons why your lawn mower idles up and down, causing it to rev unexpectedly or ride rougher than usual. Also, the exhaust glows red. ” Hello Gentlemen, I need help with one of my 25hp Kohler Command Twin engines. did I put together wrong, is it a gasket issue? New to me 2021 Toro Z master with 72 in deck and Kohler ECV 980 engine. Common carburetor problems with Kohler 7000 Series engines include clogged jets, damaged floats, and worn gaskets. If you need more help, check out the “How to fix a surging mower video. Hello, here's another one. Free repair advice! I have about 50 hours on my 2015 (or 2016???) mower. It has a CV740 that now idles great, but boggs under a load. :yow!: D Can anyone help me find the carb part # for this mower? Cub cadet z force l54 ENGINE SERIAL # in coments ALSO!! Will only run smooth at 1/4 choke. If blades are engaged fuel spray coughs out the carburetor and it chugs down and dies. It’s an upgrade from my 2010 toro z master. Recent purchase. Hi Follks, I am not the best at fixing small engines so I am trying to learn. Starts right up. Even though the parts as well the steps to complete may be different, it is still the same concept to fix other engines with the same problem. Whether you're an experienced DIY enthusiast or a first-time troubleshooter, empower yourself with practical instructions to diagnose and repair common Kohler engine issues. It sounded great, started with a light choke, but once I got into the grass, it bogged down to a crawl. After sitting a few years, it would start and run, but needed a little TLC to resolve the engine surging and racing up and down. Jul 10, 2019 · You will soon make one too big and the engine will run rich and have low power. Besides, the defective crankshaft position sensor can also cause the problem. Shut it off at idle and it will probably run on or afterbang all the time. Lean on the idle circuit causes a surge because the engine without enough fuel on the idle side will start the slow and as it slows it tries to open the throttle which in turn then opens the high speed jet and the engine speed picks back up, and then starts to slow back down and is running lean on the idle circuit and the cycle repeats. Last fall it started running lousy and surging, then I couldn't get it to start a few weeks ago. Hi all, I hope one of you fine folks have a suggestion or two for me. Apr 9, 2011 · Now the rpms are going up and down up and down as I'm driving home. Question is, should I let this engine run longer with the fresh fuel in? I have been thinking of selling it just to free up some space in my barn and hopefully someone else can put it to better use. I had an Kohler 20 on Exmark Turf Tracer, finally gave up ghost. Its 4 years old and has 82 hours on it. Upgraded engine from kohler to Kawasaki. 03K subscribers Subscribe. Fuel delivery, airflow, and safety systems account for most failures, and they’re usually repairable with basic tools and methodical testing. Problem is it just barely runs. isn't turned in too far. Prior to and post repair, the engine When a Kohler engine runs and then dies, the issue is rarely catastrophic. Got no Big-D said: Woodlawnservice, did you end up having any luck finding out what your problem was? I'm dealing with a similar situation on a Hustler super mini Z that I just picked up used. Alternative engine oils and oil fi lters may be used with KOHLER engines but require 100-Hour oil and 200-Hour oil fi lter change intervals for proper maintenance. 19K subscribers in the smallengines community. doesn't rev up. Then the same with the sea foam spray (top engine cleaner and lube) Then up the main nozzle. What's the fix? I want to remember this is a timing issue?? Hope this video helps with the surging or not correct running of a kohler engine, I do not recommend these engines When on the idle circuit, vaporized gasoline and air take a different route through the small passages of the carburetor than they would if the generator were powering appliances and working harder while under load. How To Diagnose & Repair Kohler 7000 Engine That Bogs Down, Has Loss Of Power Or No Power Under Load Individualized Repair Inc 47. Now the rpms are going up and down up and down as I'm driving home. May 10, 2025 · Is your Kohler lawn mower engine surging? Learn the common causes of this frustrating issue and how to fix it yourself. Cleaning or rebuilding the carburetor can often resolve these issues. A Kohler engine revving high regardless of throttle setting usually indicates a stuck throttle linkage or a malfunctioning governor. Prior to and post repair, the engine Hello, here's another one. Lean condition (which is the occurrence of leanness is a new carb owing to vacuum leakage) 2. It violently surges at full throttle. e9n2av, 3pkd, dtkn, 12aj, etmda, pe342, i0qib, zkpw, z5m9o, mbxg4,