Small Engines (Lawn Mowers, etc.): Airens walkbehind tiller w/b&s engine 30+years old, full thro, air mixture

Question
Engine no start
Last time used approx. 5 years
Some old gas left in tank
I expelled old fuel
I removed carb  

Answer
Hello Mark:

I Just Love the Older Engines. Send me the Model and Type Numbrs Off the Engine and I May be Able to Locate a Breakdown/IPL of the Engine for you to View Online. Does the Engine have Fire to the Spark Plug? If yes, If you Pour a Small Amount of Gas (Approx 1oz) Into the Carburetor Throat; Does the Engine Start and Quit? If Yes, then Remove, Disassemble and Soak the Carburetor Overnight in Carburetor Cleaner. Then Blow Out the Passages with Compressed Air. Install New Kit. Since this is an Older Engine; the Carburetor has Air Mixture Screws. Here is the Directions for Setting these Screws. ****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.

Good Luck

Respectfully

John