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looking for a service manual for a 2000 yamaha big bear 400 or tech help with this problem. on the carburator above the inlet fuel line there is another line coming out of the carburator, which tees into 2 lines and both go to nothing. as soon as I open the fuel valve, fuel begins to run out of these two lines along with one more. I'm new to atv. any help thanks.
 

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It sounds like the float in the carb is sticking letting the gas run out of the carb overflow tube. Take the bowl off the bottom of the carb it should be held on with 4 screws. the float is under that cover, it should move up and down freely. If you have Any other questions let us know.
 
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