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  #1  
Old 05-10-2008, 09:49 PM
BLUEGRASSROOTS BLUEGRASSROOTS is offline
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Craftsman Riding Mower quits running when it gets up to temp....

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.
BLUE

Last edited by BLUEGRASSROOTS; 05-10-2008 at 09:52 PM. Reason: added more info about problem
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Old 05-10-2008, 10:20 PM
topsites topsites is offline
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It's probably the coil...
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Old 05-10-2008, 10:30 PM
Fisher40037 Fisher40037 is offline
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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.

Fish
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Old 05-10-2008, 11:08 PM
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Sharpcut 1 Sharpcut 1 is offline
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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.
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Old 05-10-2008, 11:13 PM
BLUEGRASSROOTS BLUEGRASSROOTS is offline
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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.
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Old 05-10-2008, 11:39 PM
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fixer67 fixer67 is offline
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Quote:
Originally Posted by BLUEGRASSROOTS View Post
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.
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.
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Old 05-11-2008, 12:19 AM
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Bill Kapaun Bill Kapaun is offline
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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.
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Old 05-11-2008, 12:19 AM
BLUEGRASSROOTS BLUEGRASSROOTS is offline
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Fixer67, I have checked to see if it gets a spark when it is hot and it does.
Any other suggestions?
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Old 05-11-2008, 12:22 AM
BLUEGRASSROOTS BLUEGRASSROOTS is offline
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Quote:
Originally Posted by Bill Kapaun View Post
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.
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.
Thanks,
BLUE
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  #10  
Old 05-11-2008, 12:49 AM
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fixer67 fixer67 is offline
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Quote:
Originally Posted by BLUEGRASSROOTS View Post
Fixer67, I have checked to see if it gets a spark when it is hot and it does.
Any other suggestions?
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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