Mercury - Quicksilver Prop Washer Propeller Hardware Cadmium-Plated Steel 27025. Overview. You might not think much about a prop washer - until it fails. The Mercury Marine 27025 Quicksilver Prop Washer keeps your propeller locked tight and your power delivery smooth. It's made for Mercury 39, 60, 65, and 110 outboards, and it does its job quietly, holding torque steady and keeping the prop seated just right. The cadmium-plated steel build stands up to salt, moisture, and years of hard use. It's