Thanks for the information. It is not suprising but RCU has no information on the OS 120 or your SC 120 four strokes. The Saito 120 is a lighter engine than the Magnum and YS four strokes and comparable in weight with the OS 91 surpass with pump. Guess I will have to carrry dead weight on the nose again. Hate to do that but necessary at times for balance. Maybe you could supply RCU with information on the SC engine. I am sure all of us would appreciate it. Thanks again