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Larry Farley Posted on Apr 01, 2019
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CH 20S kohler 25 hp that only run with full chock like it staving for fuel. Replaced valve cover fuel pump clean carb. several times clean tank and new fuel filter and line no change.

2 Answers

ShedThoughts

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  • Expert 199 Answers
  • Posted on Apr 04, 2019
ShedThoughts
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This is usually dirt in the carburettor or blockage in the fuel line. Clean the carb.again and make sure the main jet is clear and clean of any sediment. Buy a can of carb cleaner. Reassemble it carefully making sure all the adjustments are set as recommended or, if you dont have the data use the mid point.

CJ Rock

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  • HP Master 4,429 Answers
  • Posted on Apr 01, 2019
CJ Rock
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Check plugs for proper gap, or gap 0.005" less and see if symptoms change <?>.

The only other suggestion I have is connect a piece of transparent fuel line to the carburetor drain port and loop it up along side of carburetor to some convenient point higher than the carb. This will give you a live visual of the fuel level inside the carburetor. Fuel level should be near top of fuel bowl while engine is running. Level will change when engine is shut off (don't care).

Testimonial: "Hey: Thanks I will try this tomorrow and get back."

  • CJ Rock
    CJ Rock Apr 02, 2019

    It may be the carburetor bowl vent is plugged up.

  • CJ Rock
    CJ Rock Apr 02, 2019

    OR still a fuel delivery issue, even with new pump.

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5 Related Answers

mamicheddy

mamicheddy

  • 79 Answers
  • Posted on May 07, 2009

SOURCE: kohler motor starts then carb loads up with gas

If the engine is running rough then this could mean that you have weak spark or valve adjustment. When an engine runs rough it will not burn all the fuel, which will create excess fuel in the air cleaner housing. Also, make sure the the float is closing in the carberator.

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Jim Parker

  • 1041 Answers
  • Posted on Jun 05, 2009

SOURCE: Engine only runs with choke full on. Dies when off full choke.

Hi Dave, it sounds crazy, but try this. Check your gas cap. It could be clogged, causing a vacuum to occur in the tank, and therefore not allowing the carb. to take on gas. It usually take 10-15 min. for this to occur. The next time you run the mower and it starts to stall out, loosen the gas cap and see if it begins to run again. If it does, then you know that the gas cap is clogged.

Jim

Anonymous

  • 1 Answer
  • Posted on Sep 01, 2009

SOURCE: Popping out exhaust, loss of power, wont run at full throttle.

I had the same problem. If it is a 2 cylinder, remove the valve covers. On one side, the rocker arm had slipped off of the push rod. It was real loose. Put the rocker arm back on the push rod and tighten it down. I think this will do the trick.

Anonymous

  • 2 Answers
  • Posted on Jan 14, 2010

SOURCE: kohler k582 runs poorly at operating speed.

ALWAYS CHECK THE POINTS!!! 20 years operating this engine and you'd think I would know better. The points were severely pitted. Spec said .020 but actual is .013. The cold weather had me suspecting a carb problem. DOH!

Anonymous

  • 957 Answers
  • Posted on Apr 28, 2010

SOURCE: my cub cadet tank stops running 5-20 minuts after

Yes you may need a carb kit. It is not good practice to by-pass the fuel filter. The orifice in the jet is very small.
But anyways, There Could still be a blockage inside the carb, a small leak at the manifold, or the jet is worn out.
Let me know how it goes.

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Miller 225 with kohler ch18s engine not getting fuel.

There are several things that could be causing your Miller 225 with a Kohler CH18S engine not to get fuel. Here are a few things to check:
  1. Fuel line - Make sure the fuel line is not clogged or damaged.
  2. Fuel filter - Check the fuel filter to see if it is clogged or needs to be replaced.
  3. Fuel pump - The fuel pump may not be functioning properly. You can test the fuel pump by removing the fuel line from the carburetor and turning the engine over. If you don't see a steady stream of fuel coming out of the fuel line, the fuel pump may need to be replaced.
  4. Carburetor - The carburetor could be clogged or not functioning properly. You can try cleaning the carburetor or replacing it if necessary.
  5. Spark plug - If the spark plug is dirty or worn out, it may not be creating a spark to ignite the fuel in the engine. You can try cleaning or replacing the spark plug to see if that helps.
Jan 06, 2023 • Garden
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Kohler 14hp magnum, New fuel pump,lines, filter and New gas. It will start if I put gas in the carb but doesn't stay running also new fuel tank cap????

Points to dirty carb... Clean Carb. But first. I know it's new, but is fuel pump pumping? Pull line off pump going to carb, crank engine to see if fuel is pumping out of the port. Is it installed correctly? Center line pulse line securely connected to valve cover or wherever it is obtaining vacuum from. Are you sure pulse line has no breaks, cracks etc.? Then pull line off pump on the tank side, is fuel freely flowing out of line on that side? If all the above test good, then you have a dirty carb, and it needs to be pulled off and cleaned. Have Fun!
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Lincoln ranger 8 and kohler engine command 20. engine does not pull gas to carburetor. Putting little gas directly in carburetor; machine runs until finish gasoline inside carburator.

engines don't "pull" fuel to carb , it either gravity flows (tank over top carb) there or its pumped there , I do believe the kohler engines from 8 hp thru 25 hp use a vacuum activated fuel pump (three hoses on it) these do go bad over time and need replaced , also there are fuel filters on all these engines that need to be replaced seasonally they are not cleanable there disposable
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Runs for 10 min and stalls.

check your vent hole on fuel cap,or just loosing the gas cap so it can get air if this helps than you know it is the vent.
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I had to run full chock to get it back to the house before it shut down, what cuase this?

I'm sure you have dirt in your carb. If you know how to take the carb apart......You need to get a can of carb cleaner and carb kit. Take the carb apart and spray every hole and nook a crany you can see. Put the new kit in the carb and you should be ready to go!! This has happened to several times.
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Kohler cv491s

It could be fuel pump or carburetor. Make sure tank valve is open (if equipped), remove fuel line from carb and carefully have someone turn engine over, if you get a good stream coming from line you know pump is good, then you know problem is in carburetor. Hope this helps.

I’m happy to assist further over the phone at https://www.6ya.com/expert/layne_0fccff498c319c32

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I have a Kohler generator set model KT17 that was not run for several years and was full of old gasoline. It would not start at all so I replaced plugs, cleaned fuel pump & filter, then cleaned carb...

Check the genset controller for a fault, low oil psi, no output voltage, overspeed, overcrank / no crank disconnect signal / starter staying engaged, high engine temp.
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Kohler k582 runs poorly at operating speed. ok at idle. ambient temperature is 30 degrees.carb main fuel needle adjustment is ineffective. backfires with occasional black smoke. condition started as...

ALWAYS CHECK THE POINTS!!! 20 years operating this engine and you'd think I would know better. The points were severely pitted. Spec said .020 but actual is .013. The cold weather had me suspecting a carb problem. DOH!
2helpful
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I have a craftsman gt 6000 with kohler 18 hp magnum today it started fine and ran goodd for over an hour i put gas in it and ti would not stay runing it stated surging and popping and cuts off

Your carb is full of trash. you also probaly need to clean out the bottom of your fuel tank, blow out your lines and replace the fuel filter. I have 2 mowers with kohler engines and clean out the fuel tanks fuel lines and carbs 1 time a year. There is also a fuel shut solenoid on the carb this is normally problem if the engine does not run. but I am certain your problem is a simple fix, all you have to do is clean everything out in the fuel system.
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