Either a cable saw or a garrot
Idk, I'd be nervous if I found a bone saw in my boat.Thanks for the answers!
l’m relieved that no one yet recognizes it as a Mercruiser part, it just appeared seemingly out of nowhere and I was starting to sweat it now that the boat is almost done!
I was thinking the same thing. I have a smaller similar one in my tool box from replacing Poulan cauel lines.It looks like part of the kit to pull a new fuel line and filter into a weed eater fuel tank.