Changed oil + cleaned carb. Engine has burned a little oil in the past. Ran much better for quite a while but now it blew a ton of smoke struggled to stay running so I shut it down. Checked oil and level was high. I drained some oil + noticed it was thin + smelled heavily of gas. Lawn mower with 12.0 H.P. Briggs + Stratton Model 284707 Type 1148-E1

Hi,
Need to change the oil again, clean the carb and replace inlet needle; maybe float as well if damaged.
Peace,
Clarke