My Engine
I finally finished my engine bearers! I won't rehash how frustrating this little sub-project has been, from various causes, but will just document the finished product and offer some thoughts and crude dwgs that I hope may be useful to others. Re the 10mm engine-attach hex-head bolts, I ended up ordering them from LEAF, and are the ones (#940-326) called out in the Rotax Parts List--they're marked 8.8 on the heads. I verified with LEAF that 8.8's are the correct ones. They're held in place temporarily with junk nuts. The AN6-22A's going thru the Barry mounts are torqued down to 30 ft-lbs (360 in-lbs), as called out on the Barry Controls site--I verified that torque with them as appropriate for any load. The positions and orientations of the mounts themselves were ok'ed by 3 separate tech reps at Barry Controls--they said other installations people have used may work, but not as effectively as intended and designed for, and may not last as long. It's unfortunate that where I've located the 10mm and AN4 bolts, there's only 1/16" clearance between the heads--if I had it to do over again, I'd try something slightly different, like offsetting the AN4's away somewhat without violating 2D edge distance guidelines too badly. I maxxed the clearance as much as possible by using thin AN960-416L washers under the AN4 bolt heads, I used Lowe's thin "wave" washers under the 10mm bolt heads, I drilled the heads of the 10mm bolts for safety wire so I wouldn't need lock washers, and I added otherwise superfluous AN970-6 fender washers on top of the Barry bushings. If I have to later, I can add more of those washers as spacers.
Now I'm eager to get on to a new phase of the engine install on this same thread--the fuel system, probably. I figured out, btw, that I might as well get all these systems figured out and in place as much as possible before actually forking over big bucks for the engine. That way I can minimize wasting warranty time ticking down on me. Besides, that's a huge cash outlay that I'd rather postpone as long as I can because medical bills are killing me (is that ironic, or what?!).