Small Engines (Lawn Mowers, etc.): brigges & stratton fun power gokart, carburetor body, briggs stratton

Question
Someone gave me an old clipper gokart, briggs & stratton model number 136212 type 001601 code 95101907.   

It started on the first pull - no problem.  I have drained the gas and sprayed the carburetor with carb cleaner, put a rebuild kit on the carburetor.  The gokart has run fine for 2-3 weeks - 1-2 hours a day.  Now when the motor gets warm, it shuts off.  I noticed that the throttle is in the wide open position.  The governor control leveler seems to be keeping throttle in full open position.  I can only restart it by physically holding the throttle closed. It then runs for another minute or two and shuts off again. HELP !!!!  Thank you.

Chris S.

Answer
Hello Chris:

Send me the Model Numbers Off the Engine, Please. With these I can Locate the Proper Manual and Better Assist you. However, Check the Plug for Fire when it Shuts Off? If No Fire, then the Coil/Ign Module is Bad. The Governor is Supposed Hold the Carburetor Control Valve Full Open When the Engine is Not Running; if it is Set Correctly. Did you Soak the Carburetor or Just Spray it with Carburetor Cleaner? If you Just Sprayed it, then the Carburetor can Be the Problem. Varnish May be Slowly Restricting the Gas Flow to the Jets and Allowing the Engine to Run for a Short Time Before the Varnish Restricts the Gas to the Point the Engine Can Not Run.  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, Float Pin, Float 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. Install New Parts if Required. Are there Air Mixture Screws on the Carburetor? If Yes, then the Air Mixture Screws May Require Setting. All the Carburetor Adjustments are the Same for Lawn Mower and Trimmers. There are Several Location for the Air Mixture Screws. The Idle Air Mixture Screws are Usually Located at the Top of the Carburetor Bowl and the Top of the Carburetor Body. If the Main Air and Idle Air Mixture Screws are Side by Side on the Side of the Carburetor, then the Idle Air is the Farthest from the Engine. The Main Jet Air Mixture Screw is Located in the Bottom of the Carburetor Bowl or Beside the Idle Air Screw on the Side of the Carburetor Body. Some of the Older Model Carburetors have the Main Jet Mixture Screw Straight in from the Top of the Carburetor Body (this is Rare anymore). If you have Cleaned the Carburetor (Disassembled and Soaked Overnight in Carburetor Cleaner (I Use Gunk). Then Blow Out the Passages with Compressed Air and Install a New Kit if Required. Now Setting the Air Mixture Screws:  ****Turn the Idle Air and Main Air Mixture Screws In Until SNUG **Don Not Jam** Then Reverse Both Screws 1 1/2 Turns. Holding the Throttle Full Open, Start the Engine. Turn the Main Air Mixture Screw Clockwise Until Proper Revs are Obtained. Occasionally you May have to Turn this Counter Clockwise to Achieve the Proper Revs. Now Allow the Engine to Idle. Set the Engine Idle Screw (Not Idle Air) so the Engine will Stay Running if Required. Now Set the Idle Air Mixture Screw so there is No Hesitation when Throttling from Idle to Full Throttle. Reset the Engine Idle if Required.**** Hope this Helps. I am Here if You Require More Assistance. Let me Know What Happens, Please. Thanks.

Good Luck

Respectfully

John

PS: I am Allowed to Answer 10 Questions a Day. If you See I am Maxxed Out, then Try Submitting your Question at or Just After 9pm EST (US). My New Day Starts then. Thanks.

Respectfully

John