Mercury – Quicksilver Water Shutter | For Select MerCruiser Sterndrive Engines | 807166A1 Mercury Outboard Gear Lube Kits The MKA-21 features a sleek

The MKA-21 features a sleek black finish tailored for freshwater bass and aluminum fishing boats to match black trolling motor bases

A: Without them

Johnson Pump 10-24228-1

perfect for use under Mercury and Mariner paints

OEM Precision Fit – Manufactured to Yamaha’s exact specifications for seamless installation and long-lasting reliability

Mercury – Quicksilver Water Shutter | For Select MerCruiser Sterndrive Engines | 807166A1 Mercury Outboard Gear Lube Kits The MKA-21 features a sleekMercury Quicksilver Water Shutter For Select MerCruiser Sterndrive Engines 807166A1 Overview A small part with a big job, the Mercury Marine 807166A1 Quicksilver Water Shutter helps keep water where it belongs out of your engine. Designed for select MerCruiser sterndrive and inboard engines, this shutter sits inside the exhaust system and acts like a one way valve. When your engine is running, it allows exhaust gases to flow freely. When its idling,