The float may be stuck. Has it been sitting for awhile?. Gas gets old and gums everything up. Any engine that gets used sesonaly like lawn mowers , boats, generators, ect should have the carb cleaned every year so it can mix fuel correctly. Fuel stabilizer can reduce the frequency this needs to be done if used right.
SOURCE: Kohler Courage carbeurator leaks when engine off.
You need to rebuild the carburetor. You can most likely find a rebuild kit through the manufacturer.
SOURCE: 2 year old 19 hp Kohler courage - approx 1/2
sounds like the float in the carb is ( was ) stuck and allowed fuel to fill up the carburetor and then from there found its way to the intake and down into the cyclinder and seeped passed the rings and into the crankcase. the first thing to do is to remove the carburetor and remove the bowl and spray all parts down with carb cleaner -- make sure the float moves freely and that the float pin moves freely and seats proper. clean out any rust or other debris and re-assemble carb -- re-install carb to motor and run the mower. all should be good at this point... now when storing the mower for a long period of time - it is a good idea to turn the fuel line valve off..
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SOURCE: i have a 19 hp kohler courage on my toro zero turn
This sounds like the carb is plugged. Sometimes fuel thickens and makes globs...
If you verified the fuel flow to the inlet of the carb, then you need to take the carb off and open it up....
So, what needs to happen is you blow out all of the passageways with carb cleaner.
Any adjustable jets: make note of the position it is in, and FINGER TIGHT turn it clockwise until it closes (typically 1 to 1 1/2 turns) SOOOOO, you can set this jet back to the same positon....when finished blowing everything out, bottom the jet and back out the number of turns out, noted for that jet.
Open the float chamber, and clean as necessary, Inspect the float adjustment: invert the carb, and observe the angle of the float, relative to the carb body.... Usually almost parallel, but not necessarily.
Inspect the inlet valve, and clean those areas...
I usually use all new gaskets and valves, but if you are not a carb person, cleaning is effective and I think old gaskets may be okay, if not torn or damaged.
SOURCE: I have a Kohler Courage 19 on a Troy built lawn
sounds like you are on the right track, I would replace the needle and seat and also check the roll over solenoid that is on bottum of float bowl, some times they go bad and do that. and they have also had issues with needle and seat not sealing,. some people have put shut off valves on their line and turn it off when not using hope this helps you, don't forget the thumbs up!
SOURCE: I have a Kohler courage
Hi
Sounds like you have dirt/debris in your caburetor inlet fuel needle valve, this will cause the float needle valve to stick open and allow fuel to run out of the carburetor unchecked untill you empty the fuel tank.
Sometimes you can tap on the carburetor lightly with a hammer and dislodge the dirt/debris from the needle valve.
Check/Clean/Replace your Air Filter, a dirty air filter can make your engine run to rich with fuel.
Note: ALWAYS USE COMPRESSED AIR TO CLEAN YOUR JETS AND PASSAGES, VERY IMPORTANT.
Note:Before you disassemble the carburetor:
Mark each piece with a awl, or some kind of instrument that will make an alignment scratch before you disassemble the carburetor into separate pieces.
That way you will know which way it goes back together when you reassemble it.
Sometimes you can get by with priming the carburetor or by using starting fluid and letting it run a few times like that, and it will flush the gunk out of the jets,but most of the time you will need to rebuild the carburetor.
Be sure to check your fuel tank for water and dirt/debris, if there is water/debris then you need to clean your tank.
Check you fuel line condition after a while they will degrade and need replacment.
Check/Clean/Replace your fuel filter if you have one.
Make sure you are using fresh fuel.
If the mower is over a couple of years old, then I recommend that you buy and install a new carburetor repair kit,because the diaphragm will get hard and that will cause it to be hard to crank.
The diaphgram may look good and flexible, but it can be deceiving and not act as a fuel pump as it should because it has become too hard and will cause hard starting,start and run and shut off, etc.
When you clean your carburetor, I recommend that you use a laquer thinner type cleaner to clean and dissolve the laquer build-up in the float and needle jet passages.
Be sure to remove all plastic and rubber parts before using the laquer thinner because it can dissolve the plastic parts and render them unuseable.
Be sure to use COMPRESSED AIR to blow out all the fuel and air passages.The higher air pressure is needed to blow some of the trash/debris from the fuel or air passages.
Be careful when blowing out the passages, because there are sometimes small rubber type seats in the bottom of some of the passages.
Keep in mind that the float (if you have one) for the carburetor must be level when you go to reassemble the carburetor or follow the instructions you get with the carburetor kit, or you could also ask the parts man that you get your kit from.
When you clean your carburetor and remove the jet screws, you will first need to lightly seat the jet screws.
But before you lightly seat the jet screws count the number of turns it takes to seat the jet screws from their original position.
Be sure to mark the turns down on a piece of paper.
That way when you put the jets back in, you know to lightly seat them first and then turn them back out to their original position before you started.
Once you have your carburetor cleaned/rebuilt that should solve your problem.
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