Yes, this simple shaft & cutlass replacement turned into a total comedy of errors. This was the starboard rear mount. It had been broken for quite some time as evidenced by the mushrooming of the sheared stud. With one failed mount, in a three point Ericson design you are now left with just two mounts holding a 350+ pound engine in place, scary stuff.
If there had been four mounts and one broke not as big a deal, you'd be back to what Ericson used every day, but with just three motor mounts...well... it is what it is.