Kohler Courage Single cylinder engines are called bucket engines for a reason. because when you're done tearing them apart to find the failure, you have a nice bucket for the parts. The issue is oil. The oil journals on those engines are undersized and vertical..and when you use old oil, contaminated oil or run them low on oil, the rod bearings quickly wear out because it can't pump the oil upward and you end up snapping either the crank or the connecting rod. They're a cool design over the Briggs singles because you can get to everything without removing the head...but I run from them anytime I see them because you never know how they were taken care of. All that aside, Kohler Magnums are great, as well as their Command series. And courage series vtwins are relatively safe also. I prefer Kohler over Briggs most of the time for twin cylinder/vtwin, and briggs over Kohler for single cylinder stuff. I flip riding mowers for a side hustle for the last 5 years. Answer from 06EXTN on reddit.com
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Reddit
reddit.com โ€บ r/smallengines โ€บ kohler 27hp courage won't respond to throttle
r/smallengines on Reddit: Kohler 27hp courage won't respond to throttle
January 5, 2022 -

Hi All, Have a kohler 27hp courage. I was having some miss firing so i went ahead and replaced a few key parts that were due for being all original 2007 parts. Replaced the carb, replaced the ignition coils and spark plugs, and the starter. No linkages to the governor damaged or stretched. Only two were modified at all during the carb replacement.

Nothing overly complex. However upon start up the motor is revving extremely high. Higher than I expected a normal high throttle would be and when I try to throttle down it doesn't go down at all. In this video you can see I start it and I try to throttle it down and it doesn't change the motor output by audio. I'm a bit baffled.I quickly turned it off for fear of blowing up the engine.

https://imgur.com/a/UbpnuJU (mower on and watching governor and throttle not changing rpms) & https://imgur.com/a/sfih8h9 (linkage for throttle control movement)

I went ahead and did the "governor adjustment" procedure that I found here: https://itstillruns.com/set-governor-setting-kohler-engine-8039721.html

It seems to only turn maybe less than 1/8 of a turn so unclear if that's normal or not. Same output, no change.

Edit 2: https://imgur.com/a/4kYHlde This shows throttle actuating but not adjusting carb at all. then pictures 2 and 3 of the control assembly.

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JustAnswer
justanswer.com โ€บ small-engine โ€บ 2l8nd-27-hp-kohler-courage-engine-cub-cadet-1554-gt.html
Troubleshooting 27 HP Kohler Courage Engine on Cub Cadet 1554 GT
Hello, I beleive you have a valve problem. If you have a compression gauge first check the compression on each cylinder. The side with the weaker compression probably either has the valves set incorrectly or more likely a broken rocker arm or pudhrod. Check these and please get back with additional questions. Tom ... I have a cub cadet with the Kohler Courage 27 HP ...
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JustAnswer
justanswer.com โ€บ small-engine โ€บ cz9qy-cub-cadet-1554-kohler-27-hp-v-twin-courage.html
Expert Q&A on Kohler 27 HP V-Twin Courage Engine Issues
Customer: Good morning, my name is *****. I have a Cub Cadet 1554 with a Kohler 27 hp V-twin Courage engine. It has been difficult to start, to the point where I had to replace the solenoid because I wasn't getting voltage to the starter. Now, my starter has failed.
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Lawn Care Forum
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27hp Kholer engine..problems? | Lawn Care Forum
In contrast, our 27hp vertical shaft with 800 hrs runs well but is not as easy to start and the oil turns black by the time we change it (every 50 hrs). ... been running Kohlers for 3 years now.
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Reddit
reddit.com โ€บ r/lawnmowers โ€บ why are kohler courage engines so bad?
r/lawnmowers on Reddit: Why are Kohler Courage engines so bad?
April 17, 2024 -

I have a 21 hp single cylinder Kohler Courage. From what I can tell, the main issue with these is a cracked block which can be prevented. Are there any other issues that can be prevented? And how long could I expect it to last after lock titeing the cover bolts along with diligent maintenance? Thanks

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JustAnswer
justanswer.com โ€บ small-engine โ€บ 9313b-2011-bad-boy-60-zero-turn-mower-27-hp-kohler-courage-engine-model.html
Expert Q&A on 2011 Bad Boy 60 Zero Turn Mower with 27 HP Kohler Courage Engine
I had this same problem almost exactly a year ago (along with burning out main fuses) so, I had a dealer repair it. His diagnosis was a blown ingnition module and he replaced both factory modules with a Kohler DSAI/MDI conversion kit (Kohler ...
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Reddit
reddit.com โ€บ r/lawnmowers โ€บ kohler 27 hp courage not responding to throttle adjustment - running full blast.
r/lawnmowers on Reddit: Kohler 27 hp courage not responding to throttle adjustment - running full blast.
December 2, 2021 -

Hi All, Have a kohler 27hp courage. I was having some miss firing so i went ahead and replaced a few key parts that were due for being all original 2007 parts. Replaced the carb, replaced the ignition coils and spark plugs, and the starter. No linkages to the governor damaged or stretched. Only two were modified at all during the carb replacement.

Nothing overly complex. However upon start up the motor is revving extremely high. Higher than I expected a normal high throttle would be and when I try to throttle down it doesn't go down at all. In this video you can see I start it and I try to throttle it down and it doesn't change the motor output by audio. I'm a bit baffled.I quickly turned it off for fear of blowing up the engine.

https://imgur.com/a/UbpnuJU (mower on and watching governor and throttle not changing rpms) & https://imgur.com/a/sfih8h9 (linkage for throttle control movement)

I went ahead and did the "governor adjustment" procedure that I found here: https://itstillruns.com/set-governor-setting-kohler-engine-8039721.html

It seems to only turn maybe less than 1/8 of a turn so unclear if that's normal or not. Same output, no change.

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BobIsTheOilGuy
bobistheoilguy.com โ€บ home โ€บ forums โ€บ motorcycles, boating, small engine, aviation, powe โ€บ lawn mower and small engine
Kohler Courage engines | BobIsTheOilGuy
June 2, 2017 - I have had an Ariens self-propelled mower (for maybe 7-8 years) with a Kohler Courage engine. My engine series had an issue with corrosion in the carb. float valve which Kohler replaced under warranty. After that its been flawless. The throttle cable got a cut and broke, but I assume that was my fault.
Find elsewhere
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Homesteading Forum
homesteadingtoday.com โ€บ forums โ€บ country living forums โ€บ shop talk
Zero Turn with 27hp Kohler problems | Homesteading Forum
Otherwise, I agree with Travis, you might have one or two faulty iginition modules. I believe this is the service manual for your engine ==> http://www.kohlerengines.com/onlinecatalog/pdf/tp_2574_a.pdf Check out chapter 7 for troubleshooting the ignition system and the ignition modules.
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Lawn Care Forum
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Kohler 27 hp courage engine surges | Lawn Care Forum
I am running a Bad Boy zt lightening 50" deck 48"cut. I'm on 2 acres and about 80% is turf. The BB is a 2010 and have replaced spindles twice ,belt once, and plugs once. Other than that no problem until this week when the engine, 27hp Kohler Courage started surgeing.
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JustAnswer
justanswer.com โ€บ small-engine โ€บ 3rg8i-hello-27hp-kohler-engine-good-compression.html
Kohler Engine Lacks Power Under Load Causes and Fixes
Previously, the plugs were more brown in color. This engine runs really well but lacks power at high RPMs. It is equipped with digital spark advance ignition modules. I would consider looking for or purchasing a different carburetor if I thought ...
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JustAnswer
justanswer.com โ€บ small-engine โ€บ 4qlhq-27-hp-kohler-engine-not-getting-gas-carburetor.html
Kohler Engine Fuel Pump and Carburetor Troubleshooting Q&A
I have a Kohler 27 HP SV840-3018 the engine's fuel pump is working so it's getting gas, it turns over but it won't
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My Tractor Forum
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Choke problem - 27HP Kholer Command engine - heip | My Tractor Forum
I determine that choke was 1/4 still open when he had throttle lever in fully choked position. I resolved it by just unclamping throttle cable and pulling cable until choke closed and reclamped.
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JustAnswer
justanswer.com โ€บ small-engine โ€บ epk69-kohler-command-pro-cv750-27-hp-running-one.html
Kohler Command Pro CV750 27 HP Ignition Coil Problems and Solutions
Customer: Hi, I have a Kohler Command Pro CV750, 27 hp that is only running on one cylinder. I swapped the coils, and the issue followed the coil. I replaced that coil with the new updated coil, part number 25 584 14s.
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Lawn Care Forum
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Kohler 27hp intermittent problem | Lawn Care Forum
Restro, re. the plugs, the plugs are new, the machine had the same problem with the plugs they replaced. But good idea, thank you. Here's the engine service manual: http://www.kohlerengines.com/onlinecatalog/pdf/SM_CH18_CH750_1_11.pdf Jabbers, if it was the lifters, wouldn't I hear a ticking noise that accelerates and decelerates with the throttle?
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Outside Gear
outsidegr.com โ€บ kohler-27-hp-engine-problems
Kohler 27 Hp Engine Problems | Outside Gear
April 18, 2025 - If you are facing Kohler 27 Hp engine problems, it might be due to valve/head issues or a clogged carburetor, leading to stalling. Kohler engines can be prone
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Lawn Care Forum
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help please, Kohler 27 hp losing power and running rough | Lawn Care Forum
Looks like your air cleaner weas bouncing around. check the screws in the governor plate. I have had a screw back out due to vibration and this will cause the governor th fail, causing the throttle surge.
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Mowerify
mowerify.com โ€บ home โ€บ kohler โ€บ most common kohler courage 27hp problems with solutions
Kohler Courage 27HP Problems With Solutions - Mowerify
August 23, 2023 - Ah, the classic dilemma. Sometimes, my Kohler Courage 27 HP engine just doesnโ€™t want to start, or it starts but runs like itโ€™s had a bit too much moonshine.