Well the engine on my Troy Built Tiller took a dump yesterday? The kid was working away and was on his last run when it happen. All of a sudden some blue smoke came out the muffler then it really came out it filled the garden up! The engine was still running up till the end then it just quit and 1/2 the garden was covered in thick blue smoke??? So guess the new Briggs engine only lasted about 3 years and I will need another one for the 60 plus year old tiller. There only $158.00 way cheaper then a new one costs. It was kind of cool to watch it happen not sure what the piston or valve seal that went south did? I had just changed the oil too with fresh! Sure glad my JD4044M Tractor did not do that!