Mercury - Quicksilver Starter or Power Trim Solenoid Electrical System Marine-Grade Construction 8M0185146. Overview. There's a certain comfort that comes from knowing your boat will answer the moment you ask it to. Whether you're trimming up to glide over a shallow flat or turning the key as the sun breaks across the water, you want that smooth, steady response every single time. This Mercury Marine part gives you exactly that feeling - the quiet trust that your system will work without a fuss.