Originally Posted by MikeSmith1
I know I could attach an auxiliary bracket but I'd prefer to just mount the engine straight to the transom if possible.
Agreed, I had this problem and it was about 2mm that was the issue.
I took a grinder to the aux bracket and removed some ridges that took it back just enough to squeeze over the transom. Sounds a bit scarey but really not that bad, I just painted the bare metal where I had removed the ridges.