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Leaking carburetor I have a Ariens Snow King with a Tecumseh carburetor HS 50.My problem is that the carb is leaking fuel. What parts to be replaced?

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  • DanV2009 Apr 06, 2009

    What if the carb is leaking fuel out of the carb throat? Both lower gaskets on my Toro 521 snowthrower's engine (I think it's an HSSK55) are fine, and I have replaced the float, thinking it was full of gas and sinking. It's almost as though the needle valve that controls gas flow into the float bowl isn't closing, and the bowl is over filling right into the carb throat. If I leave gas in it and the gas valve open for more than a day, the fuel tank empties due to this weirdness. I can get it to run, barely, only if I shut the valve off between runs. Any possible advice? This carb had never been disassembled until it started doing this.
    Also, can someone help me figure out why this engine won't run with the throttle lever in the LOW setting? If I put the lever there, it just stalls, no matter how I clean or adjust the low-speed mixture screw.

  • Anonymous Mar 23, 2014

    The filter was soaked in oil and it will run without the filter on but it still leaks oil.

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Replace to gaskets on the bowl and usually theres a screw/or spring release on the bottom of the bowl....replace those gaskets as well

Posted on Feb 27, 2009

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You've hit the nail on the head.The float,needle and seat are stuck wide open.Once the carburetor bowl is full of fuel the float rises up on top which pushes the needle back into the seat shutting of the flow of fuel.As the engine consumes that fuel the float drops and opens the needle and seat filling the bowl and shutting off the fuel again.Things that cause this process to not work are:forgetting to empty or run out the fuel before storing it for the winter.Sediment buildup in the bowl.Mineral deposits in the needle and seat.
Not emptying out the carb can leave water in the bowl which freezes,crushing the float.It also promotes sediment buildup and mineral deposits.The float when crushed or cracked will not float,nor shut off fuel.Sediment takes away capacity of fuel in the bowl,very necessary for wide open throttle.Mineral deposits build up to the point that the needle and seat can't make a good seal so fuel will continue into the carburetor.
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Thank you Jerr

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