my rebuild project has the 80hp 912 with 280 hours on the hobbs;
the 4 point rubber isolation mounting for the coils has the smallest rubber isulator taking the largest vibration load - it connects to the more rigid side of the large motor mount isulators, whereas the other 3 are connecting to the motor itself, complete with some lever arm to accentuate the difference ..

so of the 4 isulators, only the little one was starting to fail .. but it should have had an easier life on the 80hp ...

the info on cracked mounting brackets for the coil bundle is great to have; and a great idea to separate the coil ground wires in case of failure to make an adequate ground ...

the replacement rubber isulator was available locally meaning not at rotax prices