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Cub cadet gas starvation

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Don J.

06-26-2002 04:17:17




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I have a Cub cadet, model 2186 that is 2 years old. It recently developed a problem.... after the engine runs for 20-30 minutes, the motor shuts down as if it is out of gas. New gas and a new gas filter have not helped the situation. After the engine cools down, it can be re-started using starting fluid, sprayed in the carbrator. Runs again for another 20 minutes or so, and shuts down again. Why when the engine gets hot is it starving for gas? Any ideas or experiences with similar problems.

Thanks,

Don J.

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Jim S.

06-26-2002 08:14:40




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 Re: Cub cadet gas starvation in reply to Don J., 06-26-2002 04:17:17  
1.) Fuel tank vent plugged? Try running it with the cap unscrewed a bit.
2.) Does it have a fuel pump? I seem to recall they do. Bad diaphram in it?
3.) I also seem to recall it has a fuel shutoff solenoid. Problem there -- sticky?
4.) Not a gas problem, maybe? Have you checked for spark by pulling a plug and cranking it right after it dies?
5.) Leaky or sticky valves? Your need to use starting fluid makes me wonder about that. At 2 years old, maintenance would have to have been poor for that problem to pop up.

Good luck.

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ed

06-26-2002 06:37:28




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 Re: Cub cadet gas starvation in reply to Don J., 06-26-2002 04:17:17  
It sounds to me like vapor lock. For some reason the gas in your fuel system is getting hot causing it to vaporize before it should. Once the gas vaporizes the fuel system can’t deliver it to where it’s needed. Once it cools down everything works fine until it heats up again.

You need to look over the engine to insure that the heat shields have not been altered or removed and that the cooling air passages are not plugged with grass. If you have an air compressor use it to blow out the air passages. You might also check the fuel line and re-route them further away from hot engine components. And finally check the mixture - a rich engine will run cooler reducing the overall temperature under the hood.

Good luck

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