Small Engines (Lawn Mowers, etc.): Vanguard B&S Carburetor Question, adjustment screws, carburetor body

Question
I came into possession of a Simplicity 16 LTH lawn tractor.  It has sat for years.  I had no spark until I disconnected the kill wires from the coils.  Now I have spark and the engine fires on starting fluid.

The carb was seriously mucked up.  I removed the float and needle valve, cleaned and blew the passages out.  Now the bowl fills with gas but the engine will not start.

My question is - what is the wire for that is connected to the bottom of the float bowl?  I'm guessing it is some kind of solenoid that is causing no fuel to be drawn into the intake.


Answer
Hello Kenneth:

The Solenoid is a Main Jet Shut Off. It has Power when the Switch is On and None when the Switch is Off. I Suggest that Since this has Set for a While, you  Remove, Disassemble and Soak 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 Accidential Spillage. Then Blow Out the Passages with Compressed Air. Install New Parts if Required. The Carburetor will Give Less Trouble when Cleaned this Way. Hope this Helps. I am Here if You Require More Assistance. Let me Know What Happens, Please. Thanks.

Good Luck

Respectfully

John