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Old 02-12-2007, 11:40 AM   post #1 of 9
PatapscoPete
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Default Kohler Command V Twin 20 Hp - stalling

Right after the cold weather hit around here I developed a problem with my Simplicity Legacy. My tractor is stalling out every 30 seconds or so. The Kohler Command V Twin 20 Hp starts right up with the choke engaged, but stalls out after running for a short while. The situation begins right after the engine gets up to operating temperature and the choke is disengaged. Applying the choke at that point doesn't help - I didn't think it would. Strangely though, applying any pressure to the brake immediately cancells the stall, and I'm able to go another 30 seconds before the stall begins.

I have the feeling there is a switch or something related to the brake that's causing the problem. Any hints?


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Old 02-12-2007, 01:55 PM   post #2 of 9
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Default Re: Kohler Command V Twin 20 Hp - stalling

Try setting the parking brake and see if it stays running. If it does than you're probably right about the brake safety switch and/or wiring to it.
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Old 02-12-2007, 05:55 PM   post #3 of 9
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Default Re: Kohler Command V Twin 20 Hp - stalling

Kinda sounds like water in the gas....
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Old 02-12-2007, 08:28 PM   post #4 of 9
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Default Re: Kohler Command V Twin 20 Hp - stalling

Sounds like the electric fuel shutoff valve. Try running a jumper from battery to valve and if that doesn't work, disconnect all wires to valve in bottom of float bowl then pull pin and spring from valve and re install DO NOT HOOK UP WIRE. Now test to see if it acts the same.
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Old 02-13-2007, 10:21 AM   post #5 of 9
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Default Re: Kohler Command V Twin 20 Hp - stalling

I agree sounds like water in the gas or possibly a dirty carburator...pull of theturn the gas off and drain the float bowl and see if that helps
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Old 02-19-2007, 09:28 AM   post #6 of 9
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Default Re: Simplicity Legacy - Kohler Command V Twin 20 Hp - stalling

If the temperature ever gets over 30 degrees around here I'll craw under the machine to see what gives. The stalling problem disappears when the brake pedal is depressed; an inch of pedal deflection is all that it takes. I know there is a starter interlock on the brake pedal; e.g. the engine will stall if you get off the tractor while the brake is not engaged. I have a strong feeling the interlock is to blame. There is a seat switch that may also be contributing to the problem.

I doubt the carb is at issue, as the problem is eliminated with any application of the brake. Is it possible to jump the switches to comfirm my suspicions? The tractor is a 2003 Simplicity Legacy (pre- XL makeover).
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Old 02-19-2007, 11:36 AM   post #7 of 9
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Default Re: Kohler Command V Twin 20 Hp - stalling

There should be a little plunger on the switch that the arm of the brake pedal makes contact with. Reach around for it and make sure it moves in and out. I had this problem on my craftsman a few years ago. I could get it to run by playing with the plunger for awhile but then wound up replacing it.
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Old 02-19-2007, 12:23 PM   post #8 of 9
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Wink Re: Kohler Command V Twin 20 Hp - stalling

It was a safety switch alright, but not the interlock on the brake. The seat switch was not working properly. When it gets really cold, the seat switch opens up intermittently even though I'm in the seat. This forces the brake interlock into thinking the operator is no longer in control, and shuts down the ignition. If I depressed the brake, the interlock is no longer in play. That's why the stall stops immediately if I apply pressure to the brake pedal. It's designed to keep running, as long as the brake is depressed, regardless of the presence of an operator in the seat.

Thanks for the advice. It pointed me in the right direction. Now all I have to do is get a replacement seat switch, and I'm good to go.
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Old 02-19-2007, 09:01 PM   post #9 of 9
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Default Re: Kohler Command V Twin 20 Hp - stalling

Sorry guys I forget about all those anti law suite switchs as I have not a thing with any.
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