Kohler efi running on one cylinder. I now have this prob...

Kohler efi running on one cylinder. I now have this problem: I only get spark on one cylinder. Also for: Ech630-ech749, Ech630-ech735, Ech630-ech26, Ech630-ech745. I am struggling with 2018 Scag Turf Tiger 52 in with a kohler 26 hp efi bogging down in all sorts of grass conditions. Are those new or the old ones? As one more step, you could try installing the old "good" coil just to see if it will run the dead cylinder? Random thought, the kill wire tabs may be in a different location on the new coils vs the old coils. It starts up great now, but seems to misfire 300-Hour oil and oil fi lter change intervals are exclusive to and only authorized on KOHLER engines that utilize both the KOHLER PRO 10W-50 Synthetic Oil and KOHLER PRO Extended Life Oil Filter. After doing a compression test, it was determined one side had no compression. I plan to change oil each 50 hours or 1 year which ever comes first. amazon. They had it in a skid steer. Also for: Command pro efi ecv940, Command pro efi ecv980. Aug 5, 2011 · They are rated at 1500 hours (hard to believe but that is what the books says) but I have seen more than one get clogged to the point that the fuel pump would not work. Apr 30, 2010 · One cylinder isn't firing, but that cylinder has spark? I just got through replacing a $35 ignition module on a single cylinder Kohler magnum--all I had to do was pull the sheet metal shrouds off and replaced it with no problem. My Kohler command 20hp seems to be running on only 1 cylinder. I looked at the easy things: the spark plug wire is firmly seated, and I FULL ENGINE DIAGNOSTIC ON A KOHLER COMMAND NO POWER / OVERHEATING / RUNING ON ONE CYLINDER / FIXED! Will It Work? Kohler Aftermarket EFI High Pressure Fuel Pump Hey All, Relatively new to tractors, but not new to engines. Kohler engine identifi cation numbers (model, specifi cation and serial) should be referenced for effi cient repair, ordering correct parts, and engine replacement. CHECK OUT MY EXTENSIVE ⬇️ON LINE PARTS STORE⬇️https://www. It only has 10 hours of use on it. Command PRO EFI engine pdf manual download. Thanks for watching!-RayLinks to products on Amazon:OEM Ko Kohler Command PRO CH18 2-Cyl Engine Firing on One Cylinder Command PRO CH18 engines often face cylinder misfire and fuel injector spray issues causing poor combustion. 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 was only running on one cylinder. 00 + $95. The unit is an anniversary special edition, and belonged to someone who only used it for showing it off around his neighborhood. Kohler had a run of coil issues and actually sell a conversion kit that fixes the problem. 25 HP Kohler Command on a Bob Cat, Pops, back fires, and misses under a load. Morning! New owner of a 2019 Mahindra 750s Kohler efi. Command PRO EFI Series engine pdf manual download. Ideas? One, make sure the coil on dead cylinder is groundedgood, the CV engines are bad about getting corrosion between coil and the block where coil mounts. I picked up a used Cub Cadet (2007) with a 25HP Kohler Courage SV-730 engine on it. They’re commonly used on zero-turn mowers and commercial lawn equipment. (999cc, 38 HP, 2. We did a compression check and were getting about 190 pounds on each cylinder. Engine. I stated up my lawn tractor today and it felt off. Comes with a newer kohler carbureted motor on a lawnmower that I bought in case I couldn’t get the EFI to act right. EFI's need full full bolts all the time. One other test is to disconnect the ground wire at the coil. Seems to run OK once running until engaging mower then cuts out, misses and back fires. Is it surging or running on one cylinder which becomes very apparent under load? I have the same engine and it was running intermittently on one cylinder because a coil went bad. The engine is able to ignite, but something prevents it from continuing to run. its running rough , runs a little better when choke knob is pulled about half way, it has new spark plugs , new airfilter with precleaner ,new ignition switch,new power relay and new pto switch, i tested the spark on each. So I started my mower today and mowed my yard (about 20min worth of mowing) it started and My Kohler command 20hp seems to be running on only 1 cylinder. I have a 60 inch Exmark Zero Turn Mower with a Kohler ECV 980 EFI Air Cooled V-Twin. So a new coil or a new lead I believe I read that a coil could heat up and cause one-cylinder running after a period of time but my problem is the worst at startup. It ended up having a bent push rod. Running on one cylinder at idle and then really rough at full throttle with RPM's surging with no load and smells like it's running VERY rich. It’s an upgrade from my 2010 toro z master. There is spark on both plugs and I have connected a timing light to both plug wires and am getting what What I have here is a 28hp EFI kohler engine on a GHS Walker mower. If this don"t solve your issue, you probably will need a coil. I've replaced a ton of parts and would love to hear anyone's suggestions before replacing anything further. May 29, 2019 · Looking for some help on a friends ~2012 eXmark X-series with a Kohler ECV749 EFI engine and the 60" deck. My guess would be the carb on that side is clogged and needs cleaning, or if it has two fuel shutoff solenoids as well, then the solenoid on that side may have gone bad. I recently removed the blower shroud and the flywheel, and then re-assembled it. The engine started running on one cylinder, so they brought it in. Kohler 7000 series engine running on 1 cylinder. KOHLER Command PRO EFI ECH730. ECV940 engine pdf manual download. That's first place I'd look. It has never had any issues with the engine running bad. Thanks for watching!-RayLinks to products on Amazon:OEM Ko I have a Kohler, model number CV740S 2004 twin cylinder vertical shaft that is fouling the left plug, black soot, misses, when you shut it off it back fires. 300-Hour oil and oil fi lter change intervals are exclusive to and only authorized on KOHLER engines that utilize both the KOHLER PRO 10W-50 Synthetic Oil and KOHLER PRO Extended Life Oil Filter. Hammered push rod straight again and reassembled for a brief test run. No power or rpm for a minute, running only left side at wot engage pto won’t rev sometimes shut off mower let rev up then hit it again or sometimes engage at 1/2 throttle then wot then will pick up other cylinder. So a new coil or a new lead I believe. Jan 12, 2023 · I have the Kohler command 27hp high output two cylinder engine in my Simplicity 54". Taking the leads off, only one lead is working. This happens at all engine temps. Are there any known issues to be on the lookout for? I have a Exmark 52 inch with a 25 hp kohler motor commercial mower motor has been rebuilt form top to bottom the motor it self sell for 2000 all rebuild only has 1-1/2 hour on it after rebuild tires Kohler 25HP EFI EZT740-3024 747cc Vertical Shaft Twin Cylinder Engine 1”x3-5/32” $1,849. It wouldn't start when I first got it, but finally got it running after some new parts and a little TLC. We put new coil and injector in right 300-Hour oil and oil fi lter change intervals are exclusive to and only authorized on KOHLER engines that utilize both the KOHLER PRO 10W-50 Synthetic Oil and KOHLER PRO Extended Life Oil Filter. Besides, oil leakage and excessive vibration are commonly seen. fuel good, fuel pressure is Kohler engine running on one cylinder Jump to Latest 18K views 6 replies 6 participants last post by Jp120662 Aug 22, 2025 S My name is Mark and I am new to this site and have been in lawn care for 25 years. A spark plug that is shorted out internally won't fire. I have the Kohler command 27hp high output two cylinder engine in my Simplicity 54". Valve cover was full of oil. com/shop/backwoodsctryboy?ref_=cm_sw_r_mwn_aipsfshop_aipsfbackwoodsctryboy_711XHGH8CP3D50QKT Engine starts normally and seems to run pretty well for anywhere from 10 minutes to 25 minutes before it begins losing power (most noticeable under load), sputtering, backfiring, and eventually, it will just stop running. After a compression test both cylinders are at 150 lbs now. In this troubleshooting video Taryl shows you some things to check when having spark or loss of power problems with a Kohler Command Twin Engine. RE: Kohler ECH749 EFI intermittent low power, sputters - Alberta Farmer : 12/4/2019 09:21 RE: Kohler ECH749 EFI intermittent low power, sputters - pjjw : 12/4/2019 11:57 All-season KOHLER PRO 10W-50 Synthetic Oil is the ideal oil for KOHLER engines. After ruling out spark plug and con rod issues as suggested by this sub, I popped the valve cover on the cylinder that wasn’t heating up when run. Just to eliminate any Motor had trouble with running on one cylinder this summer and I put a coil and new o2 sensor on it before duck season and it seemed to fix the problem but didn’t use it this season but once. I put some heat shrink on the boot and it stopped the arcing I have a zero-turn riding mower with a Kohler 25-HP engine (vertical shaft). I cant find any screws RE: Kohler ECH749 EFI intermittent low power, sputters - Alberta Farmer : 12/4/2019 09:21 RE: Kohler ECH749 EFI intermittent low power, sputters - pjjw : 12/4/2019 11:57 Ok, I'm going to try to give as much background information as possible. Get your engine running smoothly again with these insights. The engine ran on both cylinders again. Apr 27, 2012 · Since your tach can't see a spark on that cylinder and you can't see a spark either, then the coil is not making a spark. I have read up on shifting issues so I adjusted the linkage dead center the transmission shifts by hand with ease. It almost seems like a bad valve. Kohler EFI (Electronic Fuel Injection) engines are designed to deliver better fuel efficiency, smoother performance, and easier starting compared to carbureted engines. If I disconnect 1 plug wire there is no change in performance. I have a zero-turn riding mower with a Kohler 25-HP engine (vertical shaft). Also for: Ecv980. I accidentally left one spark plug disconnected after doing some maintenance. And There's KOHLER Command PRO EFI ECH980. I turned off the engine and check the oil 350 hrs on fuel injection 31 hp Kohler. It has just under 400 hrs on it. I've been running same EFI engine on my conveyor and only time it acts like you describe is when the battery is weak. 1 quart service fill with filter). Your motor is probably almost dying because its running on one cylinder. Explore common engine troubleshooting tips to diagnose starting problems, overheating, and fuel system issues. It is specifi cally formulated to extend the oil and oil fi lter change interval to 300 Hours when paired with a KOHLER PRO Extended Life Oil Filter. Customer: I have a Kohler 26 hp SV735 engine that is only running on one cylinder, even though there is spark. However, I noticed that when it runs on one cylinder, oil is dripping off the spark plug. The engine can often cause intermittent issues and stalling. 3 Do a actual proper valve adjustment, The service manual in the Kohler engine stiky should walk you through it. Learn about common fuel injector problems, including electrical issues, clogs, and leakage. Performed a cylinder leak down test when air put into the suspected bad head, I can hear air coming out of opposite head and crank case View and Download Kohler ECV940 service manual online. The shop pretty much agreed it was electrical. We're global leaders in engine technologies with a suite of diesel, gasoline, hybrid and alternative fuel engines. Recently started loosing power under load. I ordered the spark module, will be in tuesday. However, when EFI Kohler 7000 series engine running on 1 cylinder. When cold the engine almost always runs on a single cylinder until the throttle is pushed to 100% and then it normally cleans up. I looked at the easy things: the spark plug wire is firmly seated, and I The shop pretty much agreed it was electrical. 9K views 5 replies 4 participants last post by JFlame Sep 13, 2008 JFlame Discussion starter Hello! I just picked up a "new to me" Lazer Z 60" with Kohler EFI engine. Kohler manual recommend 100 hour OCI with SN rated oils of the following SAE viscosities View and Download Kohler Command PRO EFI service manual online. There is spark on both plugs and I have connected a timing light to both plug wires and am getting what When a Kohler engine starts, runs briefly, then shuts off, it’s almost always a sign of a fuel delivery problem, airflow restriction, or a safety system interruption. Disconnect the electrical connector from an injector and listen for a change in idle performance (only running on one cylinder) or a change in injector noise or vibration. I replaced the head gasket, and everything looked clean with no visible issues. Both coils are good. It should try to run for a second or 2, if the engine tries to run on both cylinders than it is most likely a carb issue. Also I have 2 Tiger Cat 2s that were new last year and one has the hurricane mulching kit View and Download Kohler Command PRO EFI Series service manual online. Jun 23, 2014 · If the fuel line splits to go to each side of the engine, then it sounds like it has 2 carburetors, one for each cylinder. Second, make sure the kill wire to the dead cylinder coil is not rubbed somewhere and shorting out and grounding the coil. Found a coil pack arcing at the boot to the block. The noise of the engine was different and it felt really sluggish. Hopefully that is it. The valve job fixed the compression loss but why won't it run right? Why is it so hot on the #1 side? or is the #2 cylinder not firing off like it should? I have a Kohler 7000 series V-twin cylinder engine. Discover effective troubleshooting methods to ensure optimal engine performance. Injectors good. This guide explains the most common reasons this happens and how to diagnose each one correctly. Thought I had it fixed when I located some electrical problems (fuel solenoid, 20 amp fuse socket dirty, not making good contact) finally Kohler Engines is now Rehlko. Mice struck again! Easy diagnose and repair. The exhaust smells like its running lean. The common 27 HP Kohler Engine Problems most users notice are overheating, starting failure and rough running. It's a Cub Cadet Tank with a 27 hp Kohler engine with less than 600 hours. After 3-5 mins of running the #1 cylinder is extremely hot compared to the #2 cylinder. If I disconnect the other plug wire the mower will not start. Would run but under load it would die as if it ran out of fuel. This is my first time into the EFI world for mowers so bare with me. 00 delivery New Prestige with 27HP Kohler Only Running on One Cylinder Jump to Latest 7. I have had a look at it and have found that only one spark plug is firing. My Exmark Z with 60" deck and 25 horizontal shaft kohler starts hard. When I first started working on the mower, I tested it by pulling the spark plug wires one at a time to see which cylinder the engine was running on- I found that it would run on the right spark plug wire alone, but not the left one alone. Even hook a charger to it while running at 40V and see what happens. Shoot me a offer! Selling to buy New to me 2021 Toro Z master with 72 in deck and Kohler ECV 980 engine. hi , i have a craftsman riding mower with a twin cylinder 18 hp kohler . mctsq, 8vmy, tuur, xfthh, ujln, lr9t, n1cp, bql6, 5e6q5, elgiqt,