Mercury – Quicksilver 5W-30 4-Stroke Full Synthetic Marine Engine Oil | Premium Marine Lubrication | Full Synthetic Protection | 8M0148475 Cooler Cushions That quiet reliability is why

That quiet reliability is why so many boaters trust Mercury Marine parts like the 991551 thermostat

Choosing OEM oil is a simple decision when you think about it

helps regulate airflow at idle so the engine can maintain a steady idle speed

• Restores Water Pump Efficiency – Replacing worn housings helps maintain proper cooling water flow and pump pressure

Engineered to meet Yamaha's stringent standards

Mercury – Quicksilver 5W-30 4-Stroke Full Synthetic Marine Engine Oil | Premium Marine Lubrication | Full Synthetic Protection | 8M0148475 Cooler Cushions That quiet reliability is whyMercury Quicksilver 5W 30 4 Stroke Full Synthetic Marine Engine Oil Premium Marine Lubrication Full Synthetic Protection 8M0148475 Overview If youve spent enough time on the water, you know how much trust you place in your engine every time you turn the key. It has to fire up cleanly, push through chop, idle smoothly through no wake zones and take you home without hesitation. The oil inside it plays a bigger role than most people realize, quietly