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    Sabradon's Avatar
    Sabradon Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Apr 15, 2007, 07:24 AM
    Lawmower Just Quits Running restarts after an hour
    I have a Craftsman 42" riding mower with a Kohler engine. It runs great for about 20-30 minutes then quits as if it ran out of gas. I have cleaned the tank, fuel lines, replaced the fuel filter, the air filter, replaced the oil/filter, spark plug, battery, checked all the wring. It will turn over but not start, so it doesn't indicate a safety switch issue. If it sets for 45 minutes to an 1 hour it restarts, runs fine for another 20-30 minutes and does it again. What could I have overlooked?
    bikerguy's Avatar
    bikerguy Posts: 87, Reputation: 13
    Junior Member
    		  
    #2

    Apr 15, 2007, 07:48 AM
    The Lubrication! Could be overheating, change oil and filter, fill to PROPER levels. Possibly its just cooling off and then working OK? Just a thought...
    Thomas Mills's Avatar
    Thomas Mills Posts: 31, Reputation: 7
    Junior Member
    		  
    #3

    Apr 15, 2007, 03:09 PM
    It sounds like a vapor lock. Check the fuel line to see if it is touching any hot part of the engine. Try to stick the fuel line up away from any hot spots. Thomas
    Astupar's Avatar
    Astupar Posts: 1, Reputation: 1
    New Member
    		  
    #4

    Apr 22, 2007, 10:42 AM
    Quote Originally Posted by Sabradon
    I have a Craftsman 42" riding mower with a Kohler engine. It runs great for about 20-30 minutes then quits as if it ran out of gas. I have cleaned the tank, fuel lines, replaced the fuel filter, the air filter, replaced the oil/filter, spark plug, battery, checked all the wring. It will turn over but not start, so it doesn't indicate a safety switch issue. If it sets for 45 minutes to an 1 hour it restarts, runs fine for another 20-30 minutes and does it again. What could I have overlooked?
    I have the same problem, and I've yet to solve it. I just started it it for the first time yesterday and now it dies after about 5 minutes. I let it sit overnight and it statred right up this morning, then died 5 minutes later.

    I've cleaned the carb, checked all wiring... nothing seems to help. DId oil change and filter work for you. I didn't think of that?
    newaukumdon's Avatar
    newaukumdon Posts: 525, Reputation: 44
    Senior Member
    		  
    #5

    Apr 22, 2007, 11:34 PM
    Is the battery fully charged? The fuel cut solenoid under carburetor will fail under low volt situations.

    Don
    Thomas Mills's Avatar
    Thomas Mills Posts: 31, Reputation: 7
    Junior Member
    		  
    #6

    Apr 23, 2007, 07:15 PM
    Good answer Newaukumdon. Thomas
    Sabradon's Avatar
    Sabradon Posts: 2, Reputation: 1
    New Member
    		  
    #7

    Apr 24, 2007, 02:19 AM
    It was the spark plug wire. I replaced the "ignition module", (spark plug wire with coil attached) that mounts at the magneto. Runs like a new one. Thanks for everyone's input
    newaukumdon's Avatar
    newaukumdon Posts: 525, Reputation: 44
    Senior Member
    		  
    #8

    Apr 24, 2007, 09:02 AM
    Very good, it must be a relief to have found the problem without just replacing all the parts..

    Don
    lawntractor horn's Avatar
    lawntractor horn Posts: 1, Reputation: 1
    New Member
    		  
    #9

    May 24, 2007, 01:32 PM
    I wanted to add that I had the same problem as Sabradon on the same lawn tractor and it was fixed by replacing the ignition module... I had also gone through the same routine he described... thanks to Sabradon as I did this as a result of his post on this website... my local lawn and garden store was clueless and told me I was likely at the end of the tractor's life (10 years) and the problem probably was due to something or other having to do with compression... I think he just wanted to sell a new tractorl. This website saved me a lot of money and agravation... thanks
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