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Re: Carburetor float help!!
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Posted by Bob M on June 11, 2004 at 07:50:48 from (165.170.128.65):
In Reply to: Carburetor float help!! posted by Andrew Kopel on June 11, 2004 at 06:14:18:
Andrew - Suggestions for a few things to try: 1 � With the carb still on the tractor remove the float bowl. Lightly lift the float with one finger (to close the needle valve) then open the fuel shutoff at the sediment bulb. If any gas appears the problem�s somewhere around the needle valve. Look for a defective needle or seat, junk caught in the needle valve, bad or missing gasket ring under the valve seat fitting, or possibly a crack in the casting where the seat screws in. 2 � Now let the float drop with the shutoff valve still open. Gas should run freely from the float needle valve. Lifting the float again should immediately stop the flow. 3 - If the above checks out, reassemble the carburetor then remove it from the tractor. Invert the carb and shake it up and down. You should hear a distinct rattling as the float moves inside. If you hear nothing the float�s binding somewhere � you�ll need to remove the bowl find it. Or with the carb inverted, apply light and gradually increasing air pressure at the fuel inlet. At low air pressure (5 psi or less) you should hear nothing. However as pressure increases at some point you should hear a hissing or farting sound from within the carb as as air pressure lifts the needle & float. (I applaud your commitment to your new daughter for your use of �G� rated language, but I cannot think of a G-rated term which more accurately describes the sound!). Anyway if you hear air escaping even at low pressure, it again indicates a float bind. Look for a bent or distorted float hinge, bent float arm, etc. Good luck and post back what you find!
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