Small Engines (Lawn Mowers, etc.): B/S running issues, carburetor body, adjustment screws

Question
John:

I have a B/S 4.5 HP no throttle engine - the mower is a Murray combo mulcher, 224110X92A.

The mower starts, then stalls.  I put clean gas in and sprayed carb cleaner into the carb.  Didn't seem to help.

The throttle control (if that is what it is) is controlled by a spring assembly, and a lever/switch on the front of the air filter.  The spring assembly is worn and has no ability to flex in either direction.

If I manually take the switch on top of the carb and move it toward the handle, I can bring the mower to a low speed and it stays on for some time.  If I press the switch toward the front of the mower, the engine revs high and then dies.  I can't seem to get the switch in the perfect position.

Does this sound like the problem, and if so, how can I fix the "idle" that is on top of the carb?

Thanks,
Chris

Answer
Hello Chris:

The Carburetor is the Problem. Usually a Breakdown of the Engine and Carburetor is All you Require to have as a Reference to Remove and Clean the Carburetor. If you DO Hit a Snag or Just Require More Detailed Instructions, Do Not Hesitate to Ask, Please. This should Show How the Carburetor is Attached to the Engine. Then Select the Carburetor File to See the Carburetor in Breakdown for Disassembly and Cleaning. **REMEMBER You Do Not have to Remove the Welch Plugs. The Following is the Instructions for Proper Carburetor Cleaning.  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. 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