OS 61 Fx Test Run After Service And Tuning.

This is an old OS 61 FX engine. I had to replace O-rings and bearings, and it has perfect compression. It has the old cast-in bracket for the high-speed needle, which can sit upright or to the side, as shown here. This engine runs perfectly and should fly well. Some people say the cast-in needle bracket gives all kinds of problems, but I have flown them on different engines, especially the 91FX, without any problems. Music By:    • Barrel Dance   no copyright Klezmer music