Small Engines (Lawn Mowers, etc.): engine cranks but wont stay running, engine cranks, air mixture

Question
QUESTION: what all is involved in cleaning a carb on a regular b&s 5hp mower i pulled the carb and removed the stale gas left in the tank i removed the needle and seat  cleaned the bowl forgot to clean the screw that goes through the center i was told that i i should have clean it also because themower will not stay running after its cranked is this the reason why it won't stay running?

ANSWER: Hello Allen:

The Carburetor Needs to be Disassembled and Soaked Overnight in Carburetor Cleaner (I use Gunk). Then Blow Out the Passages with Compressed Air and Install New Kit. If you Send me the Model Numbers Off the Engine, Please, I can Locate the Proper Manuals and Better Assist you. Here is the Instructions I send Most Questioners about the Cleaning and Setting of the Carburetors. ****The Operational/High RPM Air Mixture Screw is In the Carburetor Bowl in the Center of the Nut or Some Carburetors have Both the Idle Air and Operational Air Adjustment Screws Side by Side on the Top Side of the Carburetor. The Screw Closest to the Engine Is Usually the Operational Air Mixture Screw on this Type Carburetor.The Idle Air Mixture is the One at Top on the Side and Goes Into the Carburetor.   Some have the Idle Air Mixture Screw Going Vertically Into the Top of the Carburetor. The Engine Idle Screw is the One that Moves the Throttle Plate. The Following is the Directions for Setting these Screws. **If the Carburetor was Soaked Overnight in Carburetor Cleaning Solution and the Passages Blown Out with Compressed Air and a New Kit Installed,  then we can Set the Air Mixture Screws. Turn Both Air Mixture Screws In Until Seated. **DO NOT JAM  SNUG ONLY** Turn Both Screws Out 1 1/2 Turns. Set the Throttle to Full Open and Start the Engine. Override the Throttle by Pushing the Governor Arm by Hand and Turn the Operational/High Air Mixture Screw(bottom of the bowl) In Until the Engine is Revving Properly. Now Slow Engine to Idle. Set the Idle Air Mixture Screw so there is No Hesitation when Throttling from Idle to Full Throttle. Now Set the Engine Idle if Required.**** Hope this Helps. I am here if you Require more Assistance. Let me know what Happens, Please. Thanks. This Question was Located in the Question Pool.

Good Luck

Respectfully

John

---------- FOLLOW-UP ----------

QUESTION: here i have a briggs and stratton 6.5hp i teck engine that has a carb issue that i don't know what the problem is,it will crank after pushing the primer but it will not stay running,and i have cleaned the carb twice and it still wil not keep the mower running on its own, the only way that i can keep it running is after i crank it i have to keep giving it fuel by constantly pushing the primer bulb

Answer
Hello Again Allen:

Soaking the Carburetor is the Key. I have had to Soak Some Carburetor as Many as 4 Times (Overnight Each Time) to Get them Clean Enough to Properly Run an Engine. Usually After the 4th Cleaning, I Replace the Carburetor if the Customer Wishes. PLEASE; Send me the Model Numbers Off the Engine, Please. With these I can Locate the Proper Manual and Better Assist you. I can Also Locate a Breakdown/IPL for you to View. Thanks.

Respectfully

John