Make sure that that the drive train align so that the prop shaft will be straight.
Elathane 95A bushings.
12,44 mm hole.
Installation guide:
1 Preferred bolts are 12:9
2 Torque according to specifications http://www.millway.se/atdragningsmoment/
3 Make sure the prop shaft aligns with the engine (Important)
4 Change to rigid or stiff bushings for engine and gearbox
5 Use washers on both sides of the bushings they wont fall out.
Ignoring any of these steps can result in imbalances or failure of the hardy disc.