Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Remove the spark plug and with it grounded to the metal of the engine, see if you have spark. If plug is wet, engine is flooded, if dry, not getting fuel!
If it has spark, put a teaspoon of fuel direct into the cylinder, re-install the spark plug and see if it will fire.
The 190402 is the first part of the Briggs engine model number! It has another set of numbers to identify the engine parts, example(###) ###-####B1
Is there a fuel bowl under the fuel tank? Is the shutoff valve open?