Small Engines (Lawn Mowers, etc.): carburetor floods, zama carburetor, internal passages


Question
I recently rebuilt my carb because it ideld bad.  After replaceing the seals and installing the new needle the carb mysteriously floods! It never flooded before I Rebuilt it.  
It runs for a couple of minutes running fine but then it starts to surge and spits gas out of the air intake.  The needle has a ruber tip and the seat is brass so It shouldn't be those two.  I tried to adjust the float but its all plastic so I tried to bend the tab so it would seat sooner and still the same.  Could it have anything to do with my fuel pump? or something else?  The carb was completly cleaned and the the jets also.  Maybe The carb went bad?  
Kyle

Answer
Hello Kyle:

The Problem is the Needle (Carburetor Needle Valve). Did you Soak the Carburetor Overnight in Cleaning Solution? If No, then Varnish on the Brass Seat and in the Inlet Port is Still Present. Varnish can Not be Removed without Soaking the Carburetor in Carburetor Cleaning Solution.  Even though the Carburetor Looks Clean, the Internal Passages May be Restricted with Varnish that Gas Causes to Build Up over Time. I Suggest you Make Sure the Gas is Free Flowing to the Carburetor Inlet Port. If the Gas is Free Flowing to the Inlet Port, then  **Remove, Disassemble and Soak the Carburetor Overnight in Carburetor Cleaner (I Use Gunk). I have Found that Most People can Use a Breakdown/IPL and Disassemble the Carburetor Enough for Proper Cleaning. You Only have to Remove the Bowl (if Applicable), Float Pin (if Applicable), Float (if Applicable)  and Needle Valve and Any Adjustment Screws that Go Into the Carburetor Body. The Welch Plugs Do Not have to be Removed. Then Soak the Carburetor Body and Parts in a 1 Gallon Can of Gunk Carburetor Cleaner Overnight. The Can has a Parts Tray Inside it for the Small Parts. Once the Carburetor and Parts are in the Cleaner, you can Replace the Lid for Safety and to Prevent Accidental Spillage. Then Blow Out the Passages with Compressed Air.*** (Do Not Use High Pressure Air for the Zama Carburetors, they have Check Valves for the Primer and these are Usually Blown Out of the Carburetor if Not Careful. Allow the Zama Carburetor to Set on a Drip Pan and Dry)***. Install New Parts if Required.** If you Hit a Snag or this Does Not Correct the Problem,  I am Here if You Require More Assistance. Hope this Helps. Let me Know What Happens, Please. May the All Mighty Bless You and Yours. Thanks.

Good Luck

Respectfully

John

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Respectfully

John