Mercury - Thrust Holder Propulsion & Mounting Components Marine Alloy Finish 8M0143215. Overview. Anyone who runs small outboards knows how much character they have. They may be compact, but when they are dialed in, they push a skiff or dinghy with a confidence that feels bigger than their horsepower rating. A tight, steady prop setup is part of that magic. The Quicksilver 8M0143215 Thrust Holder gives you that same sense of certainty you get when everything on the boat just feels right - no rat