RE: Sundowner 50 Arf
Yes the blindnuts and holes were already installed by the factory. I screwed in one of the mounting screws and popped each one out. I filled the original holes with tight fitting wooden dowels and glue. Let dry then grind till the are even to firewall. I then clamped the engine to motor mounts using small c clamps and used thrust lines and old holes for orientation. It came out to 10 mm wider so ended up splitting the dirference by measuring from the center of the old holes 5mm on each side. I also marked the centerof the engine onto the motor mount so I could line up the thrust line that way. Oh also measure from thrust washer to back of motor mount. It cameout nice. Oh also the old holes actually overlap part of the old holes that is why you fill them with wooden dowel. The plane goes together quick so you shouldnt have any problems getting it ready to maiden in time. You wont be disappointed with the combo. Balance it right at 2.5 in. and she will be a sweet flying plane.