Question about Craftsman 20 Hp 42" Deck Lawn Tractor

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Craftsman dlt 2000 starts and runs good, If I turn it off it starts and dies after 5 seconds, using the choke does nothing for it. Does the same thing at any throttle speed. Once it cools, it starts and runs until I turn it off again and the problem returns. Thought maybe it was vapor lock in the fuel pump or maybe a coil going to ground but if it was a coil I would think it would ground out during the run. Need a little help.

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This appears to be all fuel related. The repair would depend on which engine you have. 1 being the CV624S Kohler and the other being one of several Briggs and Stratton Engine ranging from from 16.5 Hp - 25 Hp.

What I suspect is happening is that there is possibly debris in the very bottom of the float fuel bowl. When it sits for a while there is enough fuel that has made it by the debris that the engine will start. The fact that the engine is running creates enough vibration to float the debris away from the fuel passages. Regardless of the brand of engine you have remove the float fuel bowl and remove the debris. Then take some carb cleaner and tidy things up.

I am pretty sure the engine has a fuel shut off solenoid in the base of the carb float fuel bowl. When you remove this to gain access to the float bowl... take a look at the plunger on the solenoid. Make sure it moves up and down freely. Any sticking / spalling can cause big time engine run or starting problems. This solenoid is energized to the retracted position when you are in any engine run or start configuration. If this solenoid never retracts your engine will never have any fuel to run and chocking it will make no difference because the solenoid is blocking the fuel flow into the carb throat via the pick up tube in the bottom of the carb.

IF after you have cleaned the fuel float bowl out you still have hot start issues. It is time to start chasing wires from under the flywheel to the throttle control, to the seat switch, the blade engage foot switch and in the bnattery area. You looking for any signs of a hot wire. Frayed strands of wire at any terminal lugs or unusual corrosion. This must include the ignition switch. Take areally hard look at wires to the low oil sensor and make sure they are not chaffed. To eliminate the low oil sensor as a suspected problem FOR TROUBLESHOOTING ONLY disconnect ONE wire from the low oil level sensor then see if it starts. If the symtom is gone... dirty or bad low oil level sensor. If the symptom persists look hard at any engine wire to make sure that when the insulation gets hot that it is not causing a ground.

Let me know how it goes. If you still need more assistance I really need the mower model number (For chassis wiring) and the Engine model number for engine wiring and fuel systems so I can better assist you.

One more oh by the way question: Is there SPARK when the engine is hot and will not start? No Spark = not a fuel problem at all.

Thanks for choosing FixYa,
Kelly

Posted on Apr 09, 2011

  • Kelly
    Kelly Apr 10, 2011

    I had another line of thought of what might be causing this. Check the OIL level. If the oil level is at the low level; starting the engine could cause enough crankcase cavitation to cause the low oil level sensor to ground the engine. I really can help you and can provide service manuals.... I just need to know your Mower model number AND your ENGINE number so I can pass you the correct manuals.
    Kelly

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