Small Engines (Lawn Mowers, etc.): gas in oil pan, needle valve, body model

Question
I bought this Murray tractor lawnmower Last year it accumulated gas in the engine so I drained it and put #30Weight oil into the engine again it ran all winter no problem this spring it began again Body Model 42544X8B Serial# 7371908281P0G102  under the seat. The engine is a Briggs and Statton Model
28W707 Type 0121E1 code 98021120 The Ignition Switch is part #3497644 it has 6terminals on connector and 1 outside the connector could it be missed pined?  

Answer
If you still have gas mixing in your oil, you must have some debris in the fuel holding the needle valve open. I suggest replacing the needle and possibly flushing the fuel tank and replace the fuel filter. As far as the connector goes, I really can't say, I don't think any of the lookups I know will show where each wire goes on the plug.