RE: questions on hinges and mounting engine
Use epoxy. CA will set up too quickly to allow time to align the surfaces.
If the mount is a composite, use sheet metal screws with lockwashers under the head. Drill the proper size tap hole and lightly grease the screw before you turn it in the first time. If the mount is metal, drill and tap for the proper size machine screw and again use the lockwasher under the head.
Dr.1