I recently purchased a used craftsman 2500 psi pressure washer with a B&S 675 engine. When I bought and tested the washer did not leak oil and did not blow smoke. I got the engine home and washed our deck and the engine leaked oil from high to low level in 45 mins and was burning oil on the exterior of the engine/washer. I let it set over night and reused it the next day and it still leaked oil and smoked. Any help would be appreciated.