Briggs and Stratton 18hp intek carb issue
Hi I'm in need of some help. So I've had this problem with my intek engine I got it for free it ran fine but if the gas wasn't turned off the cylinder would be filled with gas and be hydrolocked but I bought a new carb in November and then 2 weeks ago I went to start it up and the same problem is back with a brand new carb and yesterday I was pulling my garden trailer around and we I let off the clutch of put any load on the engine it's floods and black smoke comes out the muffler I tried adjusting it for that problem didn't help but what causes this stuff I change the oil and oil filter every month because I use it constantly i change the spark plug use good gas and change the air filter what is wrong