Small Engines (Lawn Mowers, etc.): Gray Smoke after starting then dies, starter fluid, colored smoke

Question
I believe I am having gas problems with this YardMan 16.5 hp lawn tractor. This past winter I winterized the tractor by using (stabil) running the tractor for 5 minutes after adding the stabil fluid. This spring mowing the first time out...it started and ran fine with maybe a quick pause in the timing and lasted only a couple of seconds each time out.
Now when I attempt to start the engine...it turns several times before I can get it to start and then it dies out and expels a grey colored smoke after a few seconds. It also leaves a dark gas-like viscosity liquid on the ground in front of the tractor.
I have checked the fuel line and fuel filter and also the breather for obstruction and can't find any since the gas flow seems normal.
I have only used this tractor maybe a dozen times and I dont beieve it is caused from wear so I am a bit confused as to why.  Please advise

Answer
 Hello Larry:

 Check the Engine Oil for a Gas Smell. If the Oil is Good, Then Try to Run the Engine With Starter Fluid for 25 to 30 Seconds. If you can Run the Engine with Starter Fluid, then Clean and Overhaul the Carburator. If you are going to Attempt this Repair, Send me the Make, Model, Type and Code Numbers Off the Engine, Please. I May be Able to Locate a Breakdown that will Assist you in this Repair. If the Oil Smells of Gas, then Change the Oil and Allow the Crankcase to Vent the Gas Fumes for at Least 24 Hours before Adding the New Oil. Install a Cutoff Valve in the Gas Line frm the Tank and Turn Off the Flow of Gas to the Carburator After you Finish Using the Mower Each Time. Check the Gas Tank Cap and Ensure it is Venting the Tank Properly. Check the Carburator Float. If the Float Needle Isnt Seating Properly, Gas will Flood the Carburator and Pass into the Cylinder. The Gas then Seeps Into the Crankcase Around the Rings. This is the Gas Smell in the Oil. I Never Suggest Using Stable to Winterize a Mower Engine. I Suggest you Run the Engine for 5 Minutes with a Fuel Mixture like for a Trimmer or Chainsaw. Run the Carburator Dry. The Slight Oil in the Fuel Mixture Coats the Rubber and Metal Internal Components of the Carburator. Next Spring Add Regular Gas and Start the Engine. It May Smoke a Little for a Few Minutes, but the Gas will Wash the Oil Film Out of the Carburator in 2 to 3 Minutes or Less. Hope this Helps. Let me know what Happens, Please. Thanks.

 Good Luck

 Respectfully

 John