hart wrote: ↑Sun Feb 16, 2020 4:53 am
Tom, thanks for that link. Kinda hate to buy a tool I may only use once but $20 isn’t too bad I guess. I like the sling idea. I get the idea of the spreader bar (good idea) but I’m fuzzy on what you mean by choker.
I looked around and didn’t see any 5/8”-20 shouldered eye bolts (fine thread), but for $20 I don’t think you can go wrong. An alternative would be to simply drill a piece of plate or flat bar for a 5/8” clearance hole, put another hole in the other end, and bend it a little more than 90 degrees so the top of the top hole is centered over the bottom (flywheel) bolt hole. Then just use a common 5/8-20 bolt. Assuming that’s what the hole in the flywheel center is, of course.
That OB only weighs a couple or few hundred pounds, so it really doesn’t take much of a steel strap to make a lifting ring. You could put the bolt hole in the middle and bend both ends up for that matter, so it’s symmetrical. Just a little more work. Use a shackle to give the hook something to hold. But there are loads of commercial or OEM lifting lugs on lightweight items that are bolted on and are asymmetrical; I think the one on top of my OB is that way in fact.
As to the choker, I was envisioning a pair of lines with a Flemish eye on one end like a dock line, choked around the flared casting under the actual engine, so it’s gripped tightly. The other ends would have to be tied, possibly choked again to a spreader beam (like a short 4x4), so nothing can slip. But as a climber, I’m sure you could think of other ways to do the same thing. Just be careful about it trying to slip out of the rigging, which is what brought my mind to a twin choker arrangement at the engine, one on each side.