I bought this engine to replace a near identical unit of same origin but different name. Spent a day changing it over, popped in 1.4 litres of good quality oil as per instructions, did preignition checks and spun her over. To my absolute surprise the motor fired in an instant. It ran for approximately 2 minutes and the suddenly came to an abrupt halt. To my horror the motor was stuck solid. I walked away in despair but returned later and tried to turn her over, it was impossible. I drained some of the oil and could swear there were tiny metal fragments in the sample. After many attempts at getting the motor to turnover I finally got her started again and ran her for about 30 minutes before losing confidence and switching her off. She seems to run OK now but I am too anxious to run her without opening her up and inspecting for any damage. Unfortunately I am a long way from home with few facilities to open her up in the field. Don't buy it you want anxiety.