Mercury - Quicksilver 8M0175441 Automatic Transmission Fluid Marine Transmission Series Premium Fluid 8M0175441. Overview. If you've spent enough time on the water, you know that a transmission that shifts cleanly can make or break a day. There's something reassuring about feeling your boat slip into gear without hesitation, whether you're easing away from the dock in the morning or lining up for a pull with a Tow Sport boat full of riders. With Quicksilver Automatic Transmission Fluid 8M0175441