Craftsman Riding Mower quits running when it gets up to temp....

Discussion in 'Mechanic and Repair' started by BLUEGRASSROOTS, May 10, 2008.


    BLUEGRASSROOTS LawnSite Member
    Messages: 5

    Hello everyone. I'm a first timer on the site and this looks like the right place to get advice on my problem.

    I have an 18 hp Craftsman 42", 6 speed transaxle mower. Model # 917273752. After about 15 minutes of mowwing it quits. I have changed the usual suspects, as in the battery, spark plug, air filter and fuel filter. But none of that hasn't seemed to fix it. I have checked to see that it is getting fuel, air and spark and it is. I am looking for any help you guys can give before I start spending a lot of money on unneccessary parts.

    Thanks in advance.
  2. topsites

    topsites LawnSite Fanatic
    Messages: 21,653

    It's probably the coil...
  3. Fisher40037

    Fisher40037 LawnSite Member
    Messages: 36

    The first thing you should do is remove the valve cover and check your valve clearences, also check the rocker arm studs for tightness, and use
    loctite if they are loose.

  4. Sharpcut 1

    Sharpcut 1 LawnSite Senior Member
    Messages: 452

    Coils probably heating up and crapping out on you. Coils will run fine when cold, and then heat up and die. Could also be a fuel vapor lock problem, at which time you should be able to take a small drop or two of gas down thwe carb and get it to fire. if it does, you know it's vapor lock.

    BLUEGRASSROOTS LawnSite Member
    Messages: 5

    Thanks everyone for your suggestions.

    I think I'll check for vapor lock and valve clearance first, then try changing the coil.
    I'm still up for more input from anyone though.

    Thanks again.
  6. fixer67

    fixer67 LawnSite Silver Member
    Messages: 2,098

    Check the coil before changing it. It is very easy to do. Go mowing just like always. The very second the engine dies turn off the blades and se the parking brake. Jump off the mower and raise the hood to check to spark. You need to check it while it is still hot.
  7. Bill Kapaun

    Bill Kapaun LawnSite Senior Member
    Messages: 956

    Ditto checking for spark right after it quits. You might even check it before you start it, so you have something to compare to.

    Also, a plugged vent in the gas cap could cause this.

    BLUEGRASSROOTS LawnSite Member
    Messages: 5

    Fixer67, I have checked to see if it gets a spark when it is hot and it does.
    Any other suggestions?

    BLUEGRASSROOTS LawnSite Member
    Messages: 5

    I have checked for spark when it is hot and when it's cold. It have the same spark hot or cold.

    I'll try taking the gas cap of also.
  10. fixer67

    fixer67 LawnSite Silver Member
    Messages: 2,098

    Does it have a fuel shut off (after fire) solenoid on the carb? It is rare but I have seen them get hot and shut down. Just a thought but it may have little or nothing to do with heat. The gas cap vent may not be working. I have seen people lose the gas caps and replace them with just any cap they could find only to have the mower act up or stop running because the tank was pulling a vacuum because of the wrong cap used.

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